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firebird-mirror/src/gpre/sql.cpp

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//____________________________________________________________
//
// PROGRAM: C Preprocessor
// MODULE: sql.cpp
// DESCRIPTION: SQL parser
//
// The contents of this file are subject to the Interbase Public
// License Version 1.0 (the "License"); you may not use this file
// except in compliance with the License. You may obtain a copy
// of the License at http://www.Inprise.com/IPL.html
//
// Software distributed under the License is distributed on an
// "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express
// or implied. See the License for the specific language governing
// rights and limitations under the License.
//
// The Original Code was created by Inprise Corporation
// and its predecessors. Portions created by Inprise Corporation are
// Copyright (C) Inprise Corporation.
//
// All Rights Reserved.
// Contributor(s): ______________________________________.
// TMN (Mike Nordell) 11.APR.2001 - Reduce compiler warnings
//
//
//____________________________________________________________
//
// $Id: sql.cpp,v 1.48 2004-09-22 08:52:47 robocop Exp $
//
#include "firebird.h"
#include <stdlib.h>
#include <string.h>
#include "../gpre/gpre.h"
#include "../jrd/ibase.h"
#include "../jrd/intl.h"
#include "../jrd/constants.h"
#include "../gpre/cme_proto.h"
#include "../gpre/cmp_proto.h"
#include "../gpre/exp_proto.h"
#include "../gpre/gpre_proto.h"
#include "../gpre/hsh_proto.h"
#include "../gpre/gpre_meta.h"
#include "../gpre/msc_proto.h"
#include "../gpre/par_proto.h"
#include "../gpre/sqe_proto.h"
#include "../gpre/sql_proto.h"
const int ERROR_LENGTH = 128;
#ifdef FLINT_CACHE
const int MIN_CACHE_BUFFERS = 250;
const int DEF_CACHE_BUFFERS = 1000;
#endif
const int DEFAULT_BLOB_SEGMENT_LENGTH = 80; // bytes
static act* act_alter(void);
static act* act_alter_database(void);
static act* act_alter_domain(void);
static act* act_alter_index(void);
static act* act_alter_table(void);
static act* act_comment(void);
static act* act_connect(void);
static act* act_create(void);
static act* act_create_database(void);
static act* act_create_domain(void);
static act* act_create_generator(void);
static act* act_create_index(bool, bool);
static act* act_create_shadow(void);
static act* act_create_table(void);
static act* act_create_view(void);
static act* act_d_section(enum act_t);
static act* act_declare(void);
static act* act_declare_filter(void);
static act* act_declare_table(gpre_sym*, DBB);
static act* act_declare_udf(void);
static act* act_delete(void);
static act* act_describe(void);
static act* act_disconnect(void);
static act* act_drop(void);
static act* act_event(void);
static act* act_execute(void);
static act* act_fetch(void);
static act* act_grant_revoke(enum act_t);
static act* act_include(void);
static act* act_insert(void);
static act* act_insert_blob(const TEXT *);
static act* act_lock(void);
static act* act_openclose(enum act_t);
static act* act_open_blob(ACT_T, gpre_sym*);
static act* act_prepare(void);
static act* act_procedure(void);
static act* act_select(void);
static act* act_set(const TEXT*);
static act* act_set_dialect(void);
static act* act_set_generator(void);
static act* act_set_names(void);
static act* act_set_statistics(void);
static act* act_set_transaction(void);
static act* act_transaction(enum act_t);
static act* act_update(void);
static act* act_whenever(void);
static bool check_filename(const TEXT *);
static void connect_opts(TEXT **, TEXT **, TEXT **, TEXT **, USHORT *);
#ifdef FLINT_CACHE
static FIL define_cache(void);
#endif
static FIL define_file(void);
static FIL define_log_file(bool);
static dbb* dup_dbb(const dbb*);
static void error(const TEXT *, const TEXT *);
static TEXT* extract_string(bool);
static swe* gen_whenever(void);
static void into(gpre_req*, GPRE_NOD, GPRE_NOD);
static gpre_fld* make_field(gpre_rel*);
static IND make_index(gpre_req*, TEXT *);
static gpre_rel* make_relation(gpre_req*, const TEXT *);
static void pair(GPRE_NOD, GPRE_NOD);
static void par_array(gpre_fld*);
static SSHORT par_char_set(void);
static void par_computed(gpre_req*, gpre_fld*);
static gpre_req* par_cursor(gpre_sym**);
static DYN par_dynamic_cursor(void);
static gpre_fld* par_field(gpre_req*, gpre_rel*);
static CNSTRT par_field_constraint(gpre_req*, gpre_fld*, gpre_rel*);
static void par_fkey_extension(CNSTRT);
static bool par_into(DYN);
static void par_options(const TEXT**);
static int par_page_size(void);
static gpre_rel* par_relation(gpre_req*);
static DYN par_statement(void);
static CNSTRT par_table_constraint(gpre_req*, gpre_rel*);
static bool par_transaction_modes(gpre_tra*, bool);
static bool par_using(DYN);
static USHORT resolve_dtypes(KWWORDS, bool);
static bool tail_database(enum act_t, DBB);
static void to_upcase(const TEXT *, TEXT *);
static swe* global_whenever[SWE_max];
static swe* global_whenever_list;
static inline bool end_of_command(void)
{
return ((gpreGlob.sw_language != lang_cobol) &&
((int) gpreGlob.token_global.tok_keyword == (int) KW_SEMI_COLON)) ||
((gpreGlob.sw_language == lang_cobol) &&
((int) gpreGlob.token_global.tok_keyword == (int) KW_END_EXEC));
}
static inline bool range_short_integer(const SLONG x)
{
return (x < 32768 && x >= -32768);
}
static inline bool range_positive_short_integer(const SLONG x)
{
return (x < 32768 && x >= 0);
}
//____________________________________________________________
//
// Parse and return a sequel action.
//
act* SQL_action(const TEXT* base_directory)
{
act* action;
enum kwwords keyword;
switch (keyword = gpreGlob.token_global.tok_keyword) {
case KW_ALTER:
case KW_COMMENT:
case KW_CONNECT:
case KW_CREATE:
case KW_DROP:
case KW_EVENT:
case KW_GRANT:
case KW_REVOKE:
case KW_BEGIN:
case KW_CLOSE:
case KW_COMMIT:
case KW_DECLARE:
case KW_DELETE:
case KW_DESCRIBE:
case KW_DISCONNECT:
case KW_END:
case KW_EXECUTE:
case KW_FETCH:
case KW_INCLUDE:
case KW_INSERT:
case KW_LOCK:
case KW_OPEN:
case KW_PREPARE:
case KW_ROLLBACK:
case KW_SELECT:
case KW_SET:
case KW_UPDATE:
case KW_WHENEVER:
case KW_DATABASE:
PAR_get_token();
break;
default:
CPR_s_error("SQL operation");
}
switch (keyword) {
case KW_ALTER:
action = act_alter();
break;
case KW_BEGIN:
action = act_d_section(ACT_b_declare);
break;
case KW_CLOSE:
action = act_openclose(ACT_close);
break;
case KW_CONNECT:
action = act_connect();
break;
case KW_COMMENT:
action = act_comment();
break;
case KW_COMMIT:
action = act_transaction(ACT_commit);
break;
case KW_CREATE:
action = act_create();
break;
case KW_DATABASE:
action = PAR_database(true, base_directory);
break;
case KW_DROP:
action = act_drop();
break;
case KW_DECLARE:
action = act_declare();
break;
case KW_DELETE:
action = act_delete();
break;
case KW_DESCRIBE:
action = act_describe();
break;
case KW_DISCONNECT:
action = act_disconnect();
break;
case KW_EVENT:
action = act_event();
break;
case KW_END:
action = act_d_section(ACT_e_declare);
break;
case KW_EXECUTE:
action = act_execute();
break;
case KW_FETCH:
action = act_fetch();
break;
case KW_GRANT:
action = act_grant_revoke(ACT_dyn_grant);
break;
case KW_INCLUDE:
action = act_include();
break;
case KW_INSERT:
action = act_insert();
break;
case KW_LOCK:
action = act_lock();
break;
case KW_OPEN:
action = act_openclose(ACT_open);
break;
case KW_PREPARE:
action = act_prepare();
break;
case KW_REVOKE:
action = act_grant_revoke(ACT_dyn_revoke);
break;
case KW_ROLLBACK:
action = act_transaction(ACT_rollback);
break;
case KW_SELECT:
action = act_select();
break;
case KW_SET:
action = act_set(base_directory);
break;
case KW_UPDATE:
action = act_update();
break;
case KW_WHENEVER:
action = act_whenever();
break;
}
MSC_match(KW_END_EXEC);
PAR_end();
action->act_flags |= ACT_sql;
return action;
}
//____________________________________________________________
//
// Given a field datatype, remap it as needed to
// a user datatype, and set the length field.
//
void SQL_adjust_field_dtype( gpre_fld* field)
{
ULONG field_length;
if (field->fld_dtype <= dtype_any_text) {
// Adjust the string data types and their lengths
if (field->fld_collate) {
if (field->fld_char_length)
field_length = (ULONG) field->fld_char_length *
field->fld_collate->intlsym_bytes_per_char;
else
field_length = field->fld_length;
field->fld_collate_id = field->fld_collate->intlsym_collate_id;
field->fld_charset_id = field->fld_collate->intlsym_charset_id;
field->fld_ttype = field->fld_collate->intlsym_ttype;
}
else if (field->fld_character_set) {
if (field->fld_char_length)
field_length = (ULONG) field->fld_char_length *
field->fld_character_set->intlsym_bytes_per_char;
else
field_length = field->fld_length;
field->fld_collate_id =
field->fld_character_set->intlsym_collate_id;
field->fld_charset_id =
field->fld_character_set->intlsym_charset_id;
field->fld_ttype = field->fld_character_set->intlsym_ttype;
}
else {
if (field->fld_char_length)
field_length = (ULONG) field->fld_char_length * 1;
else
field_length = field->fld_length;
field->fld_collate_id = 0;
field->fld_charset_id = 0;
field->fld_ttype = 0;
}
if (!(field->fld_flags & FLD_meta)) { /* field for meta operation? */
/* Field isn't for meta-data operation, so adjust it's
* type definition for local use
*/
if (field->fld_dtype != dtype_cstring)
field->fld_dtype = (gpreGlob.sw_cstring
&& field->fld_sub_type != dsc_text_type_fixed) ?
dtype_cstring : dtype_text;
if (field->fld_dtype == dtype_cstring)
field_length++;
field->fld_length = (USHORT) field_length;
}
else {
field->fld_length = (USHORT) field_length;
if (field->fld_dtype == dtype_varying)
field_length += sizeof(USHORT);
if (field_length > MAX_COLUMN_SIZE)
error("Size of column %s exceeds implementation limit",
field->fld_symbol->sym_string);
}
}
else
switch (field->fld_dtype) {
case dtype_short:
field->fld_length = sizeof(SSHORT);
break;
case dtype_long:
field->fld_length = sizeof(SLONG);
break;
case dtype_real:
field->fld_length = sizeof(float);
break;
case dtype_double:
field->fld_length = sizeof(double);
break;
// ** Begin sql/date/time/timestamp *
case dtype_sql_date:
field->fld_length = sizeof(ISC_DATE);
break;
case dtype_sql_time:
field->fld_length = sizeof(ISC_TIME);
break;
case dtype_timestamp:
field->fld_length = sizeof(ISC_TIMESTAMP);
break;
// ** End sql/date/time/timestamp *
case dtype_int64:
field->fld_length = sizeof(ISC_INT64);
break;
case dtype_blob:
field->fld_length = sizeof(ISC_QUAD);
field->fld_flags |= FLD_blob;
if (field->fld_character_set) {
field->fld_charset_id =
field->fld_character_set->intlsym_charset_id;
field->fld_ttype = field->fld_character_set->intlsym_ttype;
}
break;
default:
CPR_bugcheck("datatype not recognized");
break;
}
}
//____________________________________________________________
//
// Initialize (or re-initialize) to process a module.
//
void SQL_init(void)
{
global_whenever_list = NULL;
for (int i = 0; i < SWE_max; i++)
global_whenever[i] = NULL;
gpreGlob.module_lc_ctype = gpreGlob.default_lc_ctype;
}
//____________________________________________________________
//
//
void SQL_par_field_collate( gpre_req* request, gpre_fld* field)
{
if (MSC_match(KW_COLLATE)) {
if ((field->fld_dtype != dtype_text) &&
(field->fld_dtype != dtype_cstring) &&
(field->fld_dtype != dtype_varying))
{
PAR_error("COLLATE applies only to character columns");
}
if (gpreGlob.token_global.tok_type != tok_ident)
CPR_s_error("<collation name>");
gpre_sym* symbol = MSC_find_symbol(gpreGlob.token_global.tok_symbol, SYM_collate);
if (!symbol)
PAR_error("The named COLLATION was not found");
field->fld_collate = (INTLSYM) symbol->sym_object;
/* Is the collation valid for declared character set?
* The character set is either declared (fld_character_set) or inferered
* from the global domain (fld_global & fld_charset_id)
*/
if ((field->fld_character_set &&
(field->fld_character_set->intlsym_charset_id !=
field->fld_collate->intlsym_charset_id))
|| (field->fld_global &&
(field->fld_charset_id != field->fld_collate->intlsym_charset_id)))
{
PAR_error
("Specified COLLATION is incompatible with column CHARACTER SET");
}
PAR_get_token();
}
}
//____________________________________________________________
//
// Handle an SQL field datatype definition for
// field CREATE, DECLARE or ALTER TABLE statement.
// Also for CAST statement
//
void SQL_par_field_dtype(gpre_req* request,
gpre_fld* field,
bool is_udf)
{
char s[ERROR_LENGTH];
bool sql_date = false;
enum kwwords keyword = gpreGlob.token_global.tok_keyword;
switch (keyword) {
case KW_SMALLINT:
case KW_INT:
case KW_INTEGER:
case KW_FLOAT:
case KW_REAL:
case KW_DOUBLE:
case KW_LONG:
// ** Begin sql/date/time/timestamp *
case KW_TIMESTAMP:
// ** End sql/date/time/timestamp *
case KW_CHAR:
case KW_NCHAR:
case KW_VARCHAR:
case KW_DECIMAL:
case KW_NUMERIC:
case KW_BLOB:
case KW_NATIONAL:
PAR_get_token();
break;
case KW_DATE:
if (gpreGlob.sw_sql_dialect == 2)
PAR_error
("DATE is ambiguous in dialect 2 use SQL DATE or TIMESTAMP");
PAR_get_token();
break;
case KW_TIME:
if (gpreGlob.sw_sql_dialect == 1)
CPR_s_error("<data type>");
PAR_get_token();
break;
case KW_SQL:
if (gpreGlob.sw_sql_dialect == 1)
CPR_s_error("<data type>");
PAR_get_token();
if (gpreGlob.token_global.tok_keyword == KW_DATE)
PAR_get_token();
else
CPR_s_error("<data type>");
keyword = KW_DATE;
sql_date = true;
break;
case KW_COMPUTED:
if (is_udf)
CPR_s_error("<data type>");
// just return - actual parse is done later
return;
default:
if (is_udf) {
if (keyword == KW_CSTRING)
PAR_get_token();
else
CPR_s_error("<data type>");
}
else {
SQL_resolve_identifier("<domain name>", s);
gpre_sym* symbol =
MSC_symbol(SYM_field, s, (USHORT) strlen(s), (gpre_ctx*) field);
field->fld_global = symbol;
if (!MET_domain_lookup(request, field, s))
PAR_error("Specified DOMAIN or source column not found");
PAR_get_token();
return;
}
}
switch (keyword) {
case KW_SMALLINT:
field->fld_dtype = dtype_short;
break;
case KW_INT:
case KW_INTEGER:
field->fld_dtype = dtype_long;
break;
case KW_REAL:
field->fld_dtype = dtype_real;
break;
case KW_FLOAT:
if (MSC_match(KW_LEFT_PAREN)) {
const int l = EXP_USHORT_ordinal(true);
EXP_match_paren();
if (l < 17)
field->fld_dtype = dtype_real;
else
field->fld_dtype = dtype_double;
}
else
field->fld_dtype = dtype_real;
break;
case KW_LONG:
if (!(gpreGlob.token_global.tok_keyword == KW_FLOAT))
CPR_s_error("FLOAT");
PAR_get_token();
field->fld_dtype = dtype_double;
break;
case KW_DOUBLE:
if (!(gpreGlob.token_global.tok_keyword == KW_PRECISION))
CPR_s_error("PRECISION");
PAR_get_token();
field->fld_dtype = dtype_double;
break;
// ** Begin sql/date/time/timestamp *
case KW_DATE:
case KW_TIME:
case KW_TIMESTAMP:
field->fld_dtype = resolve_dtypes(keyword, sql_date);
break;
// ** End sql/date/time/timestamp *
case KW_NCHAR:
field->fld_flags |= FLD_national;
field->fld_dtype = dtype_text;
if (MSC_match(KW_LEFT_PAREN)) {
field->fld_char_length = EXP_pos_USHORT_ordinal(true);
EXP_match_paren();
}
else
field->fld_char_length = 1;
break;
case KW_NATIONAL:
if (!(gpreGlob.token_global.tok_keyword == KW_CHAR))
CPR_s_error("CHARACTER");
PAR_get_token();
field->fld_flags |= FLD_national;
// Fall into KW_CHAR
case KW_CHAR:
if (MSC_match(KW_VARYING)) {
field->fld_dtype = dtype_varying;
EXP_left_paren(0);
field->fld_char_length = EXP_pos_USHORT_ordinal(true);
EXP_match_paren();
break;
}
case KW_CSTRING:
if (keyword == KW_CSTRING) {
field->fld_dtype = dtype_cstring;
field->fld_flags |= FLD_meta_cstring;
}
else
field->fld_dtype = dtype_text;
if (MSC_match(KW_LEFT_PAREN)) {
field->fld_char_length = EXP_pos_USHORT_ordinal(true);
EXP_match_paren();
}
else
field->fld_char_length = 1;
break;
case KW_VARCHAR:
field->fld_dtype = dtype_varying;
EXP_left_paren(0);
field->fld_char_length = EXP_pos_USHORT_ordinal(true);
EXP_match_paren();
break;
case KW_NUMERIC:
case KW_DECIMAL:
field->fld_dtype = dtype_long;
field->fld_scale = 0;
field->fld_precision = 9;
field->fld_sub_type = (keyword == KW_NUMERIC) ? 1 : 2;
if (MSC_match(KW_LEFT_PAREN)) {
const int p = EXP_USHORT_ordinal(true);
if ((p <= 0) || (p > 18))
PAR_error("Precision must be from 1 to 18");
if ((keyword == KW_NUMERIC) && (p < 5))
field->fld_dtype = dtype_short;
else if (p > 9) {
if (gpreGlob.sw_sql_dialect == SQL_DIALECT_V5)
field->fld_dtype = dtype_double;
else
field->fld_dtype = dtype_int64;
}
if (MSC_match(KW_COMMA)) {
const int q = EXP_USHORT_ordinal(true);
if (q > p)
PAR_error("Scale can not be greater than precision");
field->fld_scale = -q;
}
field->fld_precision = p;
EXP_match_paren();
}
break;
case KW_BLOB:
field->fld_dtype = dtype_blob;
field->fld_seg_length = DEFAULT_BLOB_SEGMENT_LENGTH;
if (MSC_match(KW_LEFT_PAREN)) {
if (MSC_match(KW_COMMA))
field->fld_sub_type = EXP_SSHORT_ordinal(true);
else {
field->fld_seg_length = EXP_USHORT_ordinal(true);
if (MSC_match(KW_COMMA))
field->fld_sub_type = EXP_SSHORT_ordinal(true);
}
EXP_match_paren();
}
else {
if (MSC_match(KW_SUB_TYPE)) {
field->fld_sub_type = PAR_blob_subtype(request->req_database);
}
if (MSC_match(KW_SEGMENT)) {
MSC_match(KW_SIZE);
field->fld_seg_length = EXP_USHORT_ordinal(true);
}
}
break;
default:
CPR_s_error("<data type>");
}
// Check for array declaration
if ((keyword != KW_BLOB) && !is_udf && (MSC_match(KW_L_BRCKET))) {
field->fld_array_info = (ary*) MSC_alloc(sizeof(ary));
par_array(field);
}
if (MSC_match(KW_CHAR)) {
gpre_sym* symbol2;
if ((field->fld_dtype != dtype_text) &&
(field->fld_dtype != dtype_cstring) &&
(field->fld_dtype != dtype_varying) &&
(field->fld_dtype != dtype_blob))
{
PAR_error("CHARACTER SET applies only to character columns");
}
if (field->fld_dtype == dtype_blob && field->fld_sub_type == isc_blob_untyped)
field->fld_sub_type = isc_blob_text;
if (field->fld_dtype == dtype_blob && field->fld_sub_type != isc_blob_text)
PAR_error("CHARACTER SET applies only to character columns");
if (field->fld_flags & FLD_national)
PAR_error("cannot specify CHARACTER SET with NATIONAL");
if (!MSC_match(KW_SET))
CPR_s_error("SET");
if (gpreGlob.token_global.tok_type != tok_ident)
CPR_s_error("<character set name>");
if (!(symbol2 = MSC_find_symbol(gpreGlob.token_global.tok_symbol, SYM_charset)))
PAR_error("The named CHARACTER SET was not found");
field->fld_character_set = (INTLSYM) symbol2->sym_object;
PAR_get_token();
}
if (field->fld_flags & FLD_national) {
gpre_sym* symbol = MSC_find_symbol(HSH_lookup(DEFAULT_CHARACTER_SET_NAME),
SYM_charset);
if (!symbol)
{
PAR_error("NATIONAL character set missing");
}
field->fld_character_set = (INTLSYM) symbol->sym_object;
}
else if ((field->fld_dtype <= dtype_any_text ||
(field->fld_dtype == dtype_blob
&& field->fld_sub_type == isc_blob_text))
&& !field->fld_character_set && !field->fld_collate && request
&& request->req_database
&& request->req_database->dbb_def_charset)
{
// Use database default character set
gpre_sym* symbol = MSC_find_symbol(HSH_lookup
(request->req_database->dbb_def_charset),
SYM_charset);
if (symbol)
{
field->fld_character_set = (INTLSYM) symbol->sym_object;
}
else
PAR_error("Could not find database default character set");
}
}
//____________________________________________________________
//
// Find procedure for request. If request already has a database,
// find the procedure in that database only.
//
gpre_prc* SQL_procedure(gpre_req* request,
const TEXT* prc_string,
const TEXT* db_string,
const TEXT* owner_string,
bool err_flag)
{
SCHAR s[ERROR_LENGTH];
if (db_string && db_string[0]) {
// a database was specified for the procedure
// search the known symbols for the database name
gpre_sym* symbol = MSC_find_symbol(HSH_lookup(db_string), SYM_database);
if (!symbol)
PAR_error("Unknown database specifier.");
if (request->req_database) {
if ((DBB) symbol->sym_object != request->req_database)
PAR_error("Inconsistent database specifier");
}
else
request->req_database = (DBB) symbol->sym_object;
}
gpre_prc* procedure = NULL;
if (request->req_database)
procedure = MET_get_procedure(request->req_database, prc_string,
owner_string);
else {
// no database was specified, check the metadata for all the databases
// for the existence of the procedure
procedure = NULL; // redundant
for (DBB db = gpreGlob.isc_databases; db; db = db->dbb_next)
{
gpre_prc* tmp_procedure = MET_get_procedure(db, prc_string,
owner_string);
if (tmp_procedure) {
if (procedure) {
// relation was found in more than one database
sprintf(s, "PROCEDURE %s is ambiguous", prc_string);
PAR_error(s);
}
else {
procedure = tmp_procedure;
request->req_database = db;
}
}
}
}
if (!procedure) {
if (!err_flag)
return NULL;
if (owner_string[0])
sprintf(s, "PROCEDURE %s.%s not defined", owner_string,
prc_string);
else
sprintf(s, "PROCEDURE %s not defined", prc_string);
PAR_error(s);
}
return procedure;
}
//____________________________________________________________
//
// Find relation for request. If request already has a database,
// find the relation in that database only.
//
gpre_rel* SQL_relation(gpre_req* request,
const TEXT* rel_string,
const TEXT* db_string,
const TEXT* owner_string,
bool err_flag)
{
SCHAR s[ERROR_LENGTH];
if (db_string && db_string[0]) {
/* a database was specified for the relation,
search the known symbols for the database name */
gpre_sym* symbol = MSC_find_symbol(HSH_lookup(db_string), SYM_database);
if (!symbol)
PAR_error("Unknown database specifier.");
if (request->req_database) {
if ((DBB) symbol->sym_object != request->req_database)
PAR_error("Inconsistent database specifier");
}
else
request->req_database = (DBB) symbol->sym_object;
}
gpre_rel* relation = NULL;
if (request->req_database)
relation = MET_get_relation(request->req_database, rel_string,
owner_string);
else {
/* no database was specified, check the metadata for all the databases
for the existence of the relation */
relation = NULL; // redundant
for (DBB db = gpreGlob.isc_databases; db; db = db->dbb_next)
{
gpre_rel* tmp_relation = MET_get_relation(db, rel_string, owner_string);
if (tmp_relation) {
if (relation) {
// relation was found in more than one database
sprintf(s, "TABLE %s is ambiguous", rel_string);
PAR_error(s);
}
else {
relation = tmp_relation;
request->req_database = db;
}
}
}
}
if (!relation) {
if (!err_flag)
return (NULL);
if (owner_string[0])
sprintf(s, "TABLE %s.%s not defined", owner_string, rel_string);
else
sprintf(s, "TABLE %s not defined", rel_string);
PAR_error(s);
}
return relation;
}
//____________________________________________________________
//
// Get a relation name (checking for database specifier)
//
void SQL_relation_name(TEXT* r_name,
TEXT* db_name,
TEXT* owner_name)
{
db_name[0] = 0;
owner_name[0] = 0;
// Why not TEXT t_str[NAME_SIZE + 1]; instead and avoid deallocation problem?
TEXT* t_str = (TEXT*) MSC_alloc(NAME_SIZE + 1);
SQL_resolve_identifier("<Table name>", t_str);
gpre_sym* symbol = MSC_find_symbol(gpreGlob.token_global.tok_symbol, SYM_database);
if (symbol) {
strcpy(db_name, symbol->sym_name);
PAR_get_token();
if (!MSC_match(KW_DOT))
CPR_s_error(". (period)");
}
SQL_resolve_identifier("<Table name>", t_str);
if (gpreGlob.token_global.tok_length > NAME_SIZE)
PAR_error("Table, owner, or database name too long");
strcpy(r_name, gpreGlob.token_global.tok_string);
PAR_get_token();
if (MSC_match(KW_DOT)) {
// the table name was really a owner specifier
if (gpreGlob.token_global.tok_length > NAME_SIZE)
PAR_error("TABLE name too long");
strcpy(owner_name, r_name);
SQL_resolve_identifier("<Table name>", t_str);
strcpy(r_name, gpreGlob.token_global.tok_string);
PAR_get_token();
}
#pragma FB_COMPILER_MESSAGE("Apparently, no safe way to deallocate t_str here.")
}
//____________________________________________________________
//
// Extract SQL var
//
TEXT* SQL_var_or_string(bool string_only)
{
if ((gpreGlob.token_global.tok_type != tok_sglquoted && gpreGlob.sw_sql_dialect == 3) ||
(!isQuoted(gpreGlob.token_global.tok_type) && gpreGlob.sw_sql_dialect == 1))
{
if (string_only)
CPR_s_error("<quoted string>");
if (!MSC_match(KW_COLON))
CPR_s_error("<colon> or <quoted string>");
}
return PAR_native_value(false, false);
}
//____________________________________________________________
//
// Handle an SQL alter statement.
//
static act* act_alter(void)
{
switch (gpreGlob.token_global.tok_keyword) {
case KW_DATABASE:
case KW_SCHEMA:
return act_alter_database();
case KW_DOMAIN:
return act_alter_domain();
case KW_INDEX:
PAR_get_token();
return act_alter_index();
case KW_STOGROUP:
PAR_error("ALTER STOGROUP not supported");
case KW_TABLE:
PAR_get_token();
return act_alter_table();
case KW_TABLESPACE:
PAR_error("ALTER TABLESPACE not supported");
default:
PAR_error("Invalid ALTER request");
}
return NULL; // silence compiler
}
//____________________________________________________________
//
// Handle an SQL alter database statement
//
static act* act_alter_database(void)
{
gpre_req* request = MSC_request(REQ_ddl);
if (gpreGlob.isc_databases && !gpreGlob.isc_databases->dbb_next)
request->req_database = gpreGlob.isc_databases;
else
PAR_error("Can only alter database in context of single database");
PAR_get_token();
// create action block
act* action = MSC_action(request, ACT_alter_database);
action->act_whenever = gen_whenever();
DBB database = (DBB) MSC_alloc(DBB_LEN);
action->act_object = (REF) database;
bool logdefined = false; // this var was undefined
while (true) {
if (MSC_match(KW_DROP)) {
if (MSC_match(KW_LOG_FILE))
; // ignore DROP LOG database->dbb_flags |= DBB_drop_log;
else if (MSC_match(KW_CASCADE))
database->dbb_flags |= DBB_cascade;
#ifdef FLINT_CACHE
else if (MSC_match(KW_CACHE))
database->dbb_flags |= DBB_drop_cache;
else
PAR_error("only log or cache can be dropped");
#else
else
PAR_error("only log file can be dropped");
#endif // FLINT_CACHE
}
else if (MSC_match(KW_ADD)) {
if (MSC_match(KW_FILE)) {
do {
FIL file = define_file();
file->fil_next = database->dbb_files;
database->dbb_files = file;
}
while (MSC_match(KW_FILE));
}
else if (MSC_match(KW_LOG_FILE)) {
if (logdefined)
PAR_error("log redefinition");
logdefined = true;
if (MSC_match(KW_LEFT_PAREN)) {
while (true) {
FIL logfile = define_log_file(false);
logfile->fil_next = database->dbb_logfiles;
database->dbb_logfiles = logfile;
if (!MSC_match(KW_COMMA)) {
EXP_match_paren();
break;
}
}
if (MSC_match(KW_OVERFLOW))
define_log_file(true); // skip
else
PAR_error
("Overflow log specification required for this configuration");
}
else if (MSC_match(KW_BASE_NAME)) {
database->dbb_flags |= DBB_log_serial;
database->dbb_logfiles = define_log_file(true);
}
}
#ifdef FLINT_CACHE
else if (MSC_match(KW_CACHE))
database->dbb_cache_file = define_cache();
#endif // FLINT_CACHE
}
else if (MSC_match(KW_SET)) {
while (true) {
if (MSC_match(KW_CHECK_POINT_LEN)) {
MSC_match(KW_EQUALS);
EXP_ULONG_ordinal(true); // skip
MSC_match(KW_COMMA);
}
else if (MSC_match(KW_NUM_LOG_BUFS)) {
MSC_match(KW_EQUALS);
EXP_USHORT_ordinal(true); // skip
MSC_match(KW_COMMA);
}
else if (MSC_match(KW_LOG_BUF_SIZE)) {
MSC_match(KW_EQUALS);
EXP_USHORT_ordinal(true); // skip
MSC_match(KW_COMMA);
}
else if (MSC_match(KW_GROUP_COMMIT_WAIT)) {
MSC_match(KW_EQUALS);
EXP_ULONG_ordinal(true); // skip
MSC_match(KW_COMMA);
}
else
break;
}
}
else
break;
}
return action;
}
//____________________________________________________________
//
// Handle altering of a domain (global field).
//
static act* act_alter_domain(void)
{
// create request block
gpre_req* request = MSC_request(REQ_ddl);
if (gpreGlob.isc_databases && !gpreGlob.isc_databases->dbb_next)
request->req_database = gpreGlob.isc_databases;
else
PAR_error("Can only ALTER a domain in context of single database");
// create action block
act* action = MSC_action(request, ACT_alter_domain);
PAR_get_token();
gpre_fld* field = make_field(0);
cnstrt** cnstrt_ptr = &field->fld_constraints;
// Check if default value was specified
while (!end_of_command()) {
if (MSC_match(KW_SET)) {
if (gpreGlob.token_global.tok_keyword == KW_DEFAULT) {
field->fld_default_source = CPR_start_text();
PAR_get_token();
}
else
CPR_s_error("DEFAULT");
if (MSC_match(KW_USER))
field->fld_default_value = MSC_node(nod_user_name, 0);
else if (MSC_match(KW_NULL))
field->fld_default_value = MSC_node(nod_null, 0);
else {
if (MSC_match(KW_MINUS)) {
if (gpreGlob.token_global.tok_type != tok_number)
CPR_s_error("<number>");
GPRE_NOD literal_node = EXP_literal();
field->fld_default_value = MSC_unary(nod_negate,
literal_node);
}
else if ((field->fld_default_value = EXP_literal()) == NULL)
CPR_s_error("<constant>");
}
CPR_end_text(field->fld_default_source);
}
else if (MSC_match(KW_ADD)) {
MSC_match(KW_CONSTRAINT);
if (gpreGlob.token_global.tok_keyword == KW_CHECK) {
cnstrt* cnstrt_str = par_field_constraint(request, field, 0);
*cnstrt_ptr = cnstrt_str;
cnstrt_ptr = &cnstrt_str->cnstrt_next;
}
else
PAR_error("Invalid constraint.");
}
else if (MSC_match(KW_DROP)) {
if (MSC_match(KW_CONSTRAINT)) {
cnstrt* cnstrt_str = (cnstrt*) MSC_alloc(CNSTRT_LEN);
cnstrt_str->cnstrt_flags |= CNSTRT_delete;
*cnstrt_ptr = cnstrt_str;
cnstrt_ptr = &cnstrt_str->cnstrt_next;
}
else if (MSC_match(KW_DEFAULT)) {
field->fld_default_value = MSC_node(nod_erase, 0);
}
else
PAR_error("Invalid attribute for DROP");
}
else
CPR_s_error("SET, ADD, or DROP");
}
action->act_whenever = gen_whenever();
action->act_object = (REF) field;
return action;
}
//____________________________________________________________
//
// Handle an SQL alter index statement.
//
static act* act_alter_index(void)
{
SCHAR i_name[NAME_SIZE + 1];
// create request block
gpre_req* request = MSC_request(REQ_ddl);
if (gpreGlob.token_global.tok_length > NAME_SIZE)
PAR_error("Index name too long");
SQL_resolve_identifier("<column name>", i_name);
PAR_get_token();
IND index = make_index(request, i_name);
if (MSC_match(KW_ACTIVE))
index->ind_flags |= IND_active;
else if (MSC_match(KW_INACTIVE))
index->ind_flags |= IND_inactive;
else
PAR_error("Unsupported ALTER INDEX option");
act* action = MSC_action(request, ACT_alter_index);
action->act_object = (REF) index;
action->act_whenever = gen_whenever();
return action;
}
//____________________________________________________________
//
// Handle an SQL alter table statement.
//
static act* act_alter_table(void)
{
// create request block
gpre_req* request = MSC_request(REQ_ddl);
// get table name and create relation block
gpre_rel* relation = par_relation(request);
// CHECK Constraints require the context to be set to the
// current relation
gpre_ctx* context = MSC_context(request);
request->req_contexts = context;
context->ctx_relation = relation;
// Reserve context 1 for relation on which constraint is
// being defined
context->ctx_internal++;
request->req_internal++;
// create action block
act* action = MSC_action(request, ACT_alter_table);
action->act_whenever = gen_whenever();
action->act_object = (REF) relation;
// parse action list and create corresponding field blocks
gpre_fld** ptr = &relation->rel_fields;
cnstrt** cnstrt_ptr = &relation->rel_constraints;
cnstrt* cnstrt_str;
gpre_fld* field;
while (!end_of_command()) {
if (MSC_match(KW_ADD)) {
switch (gpreGlob.token_global.tok_keyword) {
case KW_CONSTRAINT:
case KW_PRIMARY:
case KW_UNIQUE:
case KW_FOREIGN:
case KW_CHECK:
cnstrt_str = par_table_constraint(request, relation);
*cnstrt_ptr = cnstrt_str;
cnstrt_ptr = &cnstrt_str->cnstrt_next;
break;
default:
field = par_field(request, relation);
*ptr = field;
ptr = &field->fld_next;
}
}
else if (MSC_match(KW_DROP)) {
if (gpreGlob.token_global.tok_keyword == KW_CONSTRAINT) {
PAR_get_token();
cnstrt_str = (CNSTRT) MSC_alloc(CNSTRT_LEN);
cnstrt_str->cnstrt_flags |= CNSTRT_delete;
cnstrt_str->cnstrt_name = (STR) MSC_alloc(NAME_SIZE + 1);
SQL_resolve_identifier("<constraint name>",
cnstrt_str->cnstrt_name->str_string);
if (gpreGlob.token_global.tok_length > NAME_SIZE)
PAR_error("Constraint name too long");
*cnstrt_ptr = cnstrt_str;
cnstrt_ptr = &cnstrt_str->cnstrt_next;
PAR_get_token();
}
else {
field = make_field(relation);
field->fld_flags |= FLD_delete;
*ptr = field;
ptr = &field->fld_next;
/* Fix for bug 8054:
[CASCADE | RESTRICT] syntax is available in IB4.5, but not
required until v5.0.
Option CASCADE causes an error :
unsupported construct
Option RESTRICT is default behaviour.
*/
if (gpreGlob.token_global.tok_keyword == KW_CASCADE) {
PAR_error("Unsupported construct CASCADE");
PAR_get_token();
}
else if (gpreGlob.token_global.tok_keyword == KW_RESTRICT) {
PAR_get_token();
}
}
}
else
CPR_s_error("ADD or DROP");
if (!MSC_match(KW_COMMA))
break;
}
return action;
}
//____________________________________________________________
//
// Handle an SQL comment statement.
// Reject
//
static act* act_comment(void)
{
PAR_error("SQL COMMENT ON request not allowed");
return NULL; // silence compiler
}
//____________________________________________________________
//
// Parse a CONNECT statement.
//
static act* act_connect(void)
{
act* action = MSC_action(0, ACT_ready);
action->act_whenever = gen_whenever();
bool need_handle = false;
const USHORT default_buffers = 0; // useless?
MSC_match(KW_TO);
if (!MSC_match(KW_ALL) && !MSC_match(KW_DEFAULT))
while (true) {
rdy* ready = (rdy*) MSC_alloc(RDY_LEN);
ready->rdy_next = (rdy*) action->act_object;
action->act_object = (REF) ready;
gpre_sym* symbol = gpreGlob.token_global.tok_symbol;
if (!symbol || symbol->sym_type != SYM_database) {
ready->rdy_filename = SQL_var_or_string(false);
if (MSC_match(KW_AS))
need_handle = true;
}
symbol = gpreGlob.token_global.tok_symbol;
if (!symbol || symbol->sym_type != SYM_database) {
if (!gpreGlob.isc_databases || gpreGlob.isc_databases->dbb_next || need_handle) {
need_handle = false;
CPR_s_error("<database handle>");
}
ready->rdy_database = dup_dbb(gpreGlob.isc_databases);
}
need_handle = false;
if (!ready->rdy_database) {
ready->rdy_database = dup_dbb((DBB) symbol->sym_object);
PAR_get_token();
}
// pick up the possible parameters, in any order
USHORT buffers = 0;
dbb* db = ready->rdy_database;
connect_opts(&db->dbb_r_user, &db->dbb_r_password,
&db->dbb_r_sql_role, &db->dbb_r_lc_messages,
&buffers);
gpre_req* request = NULL;
if (buffers)
request = PAR_set_up_dpb_info(ready, action, buffers);
/* if there are any options that take host variables as arguments,
make sure that we generate variables for the request so that the
dpb can be extended at runtime */
if (db->dbb_r_user || db->dbb_r_password || db->dbb_r_sql_role
|| db->dbb_r_lc_messages || db->dbb_r_lc_ctype)
{
if (!request)
request =
PAR_set_up_dpb_info(ready, action, default_buffers);
request->req_flags |= REQ_extend_dpb;
}
/* ...and if there are compile time user or password specified,
make sure there will be a dpb generated for them */
if (!request && (db->dbb_c_user || db->dbb_c_password ||
db->dbb_c_sql_role ||
db->dbb_c_lc_messages || db->dbb_c_lc_ctype))
{
request =
PAR_set_up_dpb_info(ready, action, default_buffers);
}
if (!MSC_match(KW_COMMA))
break;
}
if (action->act_object)
return action;
// No explicit databases -- pick up all known
TEXT* lc_messages = NULL;
TEXT *user = NULL, *password = NULL, *sql_role = NULL;
// The original logic suggests that "buffers" should be shared between the
// two sections of code. However, if the loop above executes, action->act_object
// is not null and therefore, the function returns before this point.
// Furthermore, connect_opts() below refills the values.
USHORT buffers = 0;
connect_opts(&user, &password, &sql_role, &lc_messages, &buffers);
for (const dbb* db_iter = gpreGlob.isc_databases; db_iter; db_iter = db_iter->dbb_next)
if (db_iter->dbb_runtime || !(db_iter->dbb_flags & DBB_sqlca)) {
rdy* ready = (rdy*) MSC_alloc(RDY_LEN);
ready->rdy_next = (rdy*) action->act_object;
action->act_object = (REF) ready;
ready->rdy_database = dup_dbb(db_iter);
}
if (!action->act_object)
PAR_error("no database available to CONNECT");
else
for (rdy* ready = (rdy*) action->act_object; ready; ready = ready->rdy_next)
{
gpre_req* request;
if (buffers)
request = PAR_set_up_dpb_info(ready, action, buffers);
else
request = ready->rdy_request;
/* if there are any options that take host variables as arguments,
make sure that we generate variables for the request so that the
dpb can be extended at runtime */
dbb* db = ready->rdy_database;
if (user || password || lc_messages || db->dbb_r_lc_ctype) {
db->dbb_r_user = user;
db->dbb_r_password = password;
db->dbb_r_lc_messages = lc_messages;
if (!request)
request =
PAR_set_up_dpb_info(ready, action, default_buffers);
request->req_flags |= REQ_extend_dpb;
}
/* ...and if there are compile time user or password specified,
make sure there will be a dpb generated for them */
if (!request && (db->dbb_c_user || db->dbb_c_password ||
db->dbb_c_sql_role ||
db->dbb_c_lc_ctype || db->dbb_c_lc_messages))
{
request =
PAR_set_up_dpb_info(ready, action, default_buffers);
}
}
return action;
}
//____________________________________________________________
//
// Handle an SQL create statement.
//
static act* act_create(void)
{
if (MSC_match(KW_DATABASE) || MSC_match(KW_SCHEMA))
return act_create_database();
if (MSC_match(KW_DOMAIN))
return act_create_domain();
if (MSC_match(KW_GENERATOR))
return act_create_generator();
if (MSC_match(KW_SHADOW))
return act_create_shadow();
if (MSC_match(KW_STOGROUP))
PAR_error("CREATE STOGROUP not supported");
if (MSC_match(KW_SYNONYM))
PAR_error("CREATE SYNONYM not supported");
if (MSC_match(KW_TABLE))
return act_create_table();
if (MSC_match(KW_TABLESPACE))
PAR_error("CREATE TABLESPACE not supported");
if (MSC_match(KW_VIEW))
return (act_create_view());
if (gpreGlob.token_global.tok_keyword == KW_UNIQUE || gpreGlob.token_global.tok_keyword == KW_ASCENDING ||
gpreGlob.token_global.tok_keyword == KW_DESCENDING || gpreGlob.token_global.tok_keyword == KW_INDEX)
{
bool descending = false;
bool unique = false;
while (true) {
if (MSC_match(KW_UNIQUE))
unique = true;
else if (MSC_match(KW_ASCENDING))
descending = false;
else if (MSC_match(KW_DESCENDING))
descending = true;
else if (MSC_match(KW_INDEX))
return act_create_index(unique, descending);
else
break;
}
}
PAR_error("Invalid CREATE request");
return NULL; // silence compiler
}
//____________________________________________________________
//
// Handle an SQLish create database statement.
//
static act* act_create_database(void)
{
bool dummy;
if (gpreGlob.isc_databases && gpreGlob.isc_databases->dbb_next)
PAR_error
("CREATE DATABASE only allowed in context of a single database");
if (!gpreGlob.isc_databases) {
// generate a dummy db
dummy = true;
gpreGlob.isc_databases = (DBB) MSC_alloc_permanent(DBB_LEN);
// allocate symbol block
gpre_sym* symbol = (gpre_sym*) MSC_alloc_permanent(SYM_LEN);
// make it the default database
symbol->sym_type = SYM_database;
symbol->sym_object = (gpre_ctx*) gpreGlob.isc_databases;
symbol->sym_string = gpreGlob.database_name;
// database block points to the symbol block
gpreGlob.isc_databases->dbb_name = symbol;
gpreGlob.isc_databases->dbb_filename = NULL;
gpreGlob.isc_databases->dbb_c_lc_ctype = gpreGlob.module_lc_ctype;
}
else
dummy = false;
// get database name
DBB db = NULL;
if (isQuoted(gpreGlob.token_global.tok_type)) {
db = dup_dbb(gpreGlob.isc_databases);
TEXT* string = (TEXT*) MSC_alloc(gpreGlob.token_global.tok_length + 1);
db->dbb_filename = string;
MSC_copy(gpreGlob.token_global.tok_string, gpreGlob.token_global.tok_length, string);
if (!gpreGlob.isc_databases->dbb_filename)
gpreGlob.isc_databases->dbb_filename = string;
PAR_get_token();
}
else
CPR_s_error("<quoted database name>");
// Create a request for generating DYN to add files to database.
// gpre_req* request = MSC_request (REQ_create_database);
gpre_req* request = MSC_request(REQ_ddl);
request->req_flags |= REQ_sql_database_dyn;
request->req_database = db;
// create action block
act* action = MSC_action(request, ACT_create_database);
mdbb* mdb = (mdbb*) MSC_alloc(sizeof(mdbb));
mdb->mdbb_database = db;
action->act_object = (REF) mdb;
action->act_whenever = gen_whenever();
if (dummy) {
// Create a ACT_database action
action->act_rest = MSC_action(0, ACT_database);
action->act_rest->act_flags |= ACT_mark;
}
// Get optional specifications
bool extend_dpb = tail_database(ACT_create_database, db);
// Create a request to generate dpb
gpreGlob.ada_flags |= gpreGlob.ADA_create_database;
request = MSC_request(REQ_create_database);
request->req_actions = action;
mdb->mdbb_dpb_request = request;
request->req_database = db;
if (extend_dpb)
request->req_flags |= REQ_extend_dpb;
return action;
}
//____________________________________________________________
//
// Handle creation of a domain (global field).
//
static act* act_create_domain(void)
{
// create request block
gpre_req* request = MSC_request(REQ_ddl);
if (gpreGlob.isc_databases && !gpreGlob.isc_databases->dbb_next)
request->req_database = gpreGlob.isc_databases;
else
PAR_error("Can only CREATE DOMAIN in context of single database");
// create action block
act* action = MSC_action(request, ACT_create_domain);
gpre_fld* field = make_field(0);
MSC_match(KW_AS);
SQL_par_field_dtype(request, field, false);
// Check if default value was specified
if (gpreGlob.token_global.tok_keyword == KW_DEFAULT) {
field->fld_default_source = CPR_start_text();
PAR_get_token();
if (MSC_match(KW_USER))
field->fld_default_value = MSC_node(nod_user_name, 0);
else if (MSC_match(KW_NULL))
field->fld_default_value = MSC_node(nod_null, 0);
else {
if (MSC_match(KW_MINUS)) {
if (gpreGlob.token_global.tok_type != tok_number)
CPR_s_error("<number>");
GPRE_NOD literal_node = EXP_literal();
field->fld_default_value = MSC_unary(nod_negate,
literal_node);
}
else if ((field->fld_default_value = EXP_literal()) == NULL)
CPR_s_error("<constant>");
}
CPR_end_text(field->fld_default_source);
}
// Check for any column level constraints
cnstrt** cnstrt_ptr = &field->fld_constraints;
bool in_constraints = true;
while (in_constraints) {
switch (gpreGlob.token_global.tok_keyword) {
case KW_CONSTRAINT:
case KW_CHECK:
case KW_NOT:
*cnstrt_ptr = par_field_constraint(request, field, 0);
cnstrt_ptr = &(*cnstrt_ptr)->cnstrt_next;
break;
default:
in_constraints = false;
break;
}
}
SQL_par_field_collate(request, field);
SQL_adjust_field_dtype(field);
action->act_whenever = gen_whenever();
action->act_object = (REF) field;
return action;
}
//____________________________________________________________
//
// Handle an SQL create generator statement
//
static act* act_create_generator(void)
{
TEXT* generator_name = (TEXT*) MSC_alloc(NAME_SIZE + 1);
SQL_resolve_identifier("<identifier>", generator_name);
gpre_req* request = MSC_request(REQ_ddl);
if (gpreGlob.isc_databases && !gpreGlob.isc_databases->dbb_next)
request->req_database = gpreGlob.isc_databases;
else
PAR_error("Can only CREATE GENERATOR in context of single database");
if (gpreGlob.token_global.tok_length > NAME_SIZE)
PAR_error("Generator name too long");
// create action block
act* action = MSC_action(request, ACT_create_generator);
action->act_whenever = gen_whenever();
action->act_object = (REF) generator_name;
PAR_get_token();
return action;
}
//____________________________________________________________
//
// Handle an SQL create index statement.
//
static act* act_create_index(bool dups,
bool descending)
{
// create request block
gpre_req* request = MSC_request(REQ_ddl);
// get index and table names and create index and relation blocks
if (gpreGlob.token_global.tok_length > NAME_SIZE)
PAR_error("Index name too long");
SCHAR i_name[NAME_SIZE + 1];
SQL_resolve_identifier("<column name>", i_name);
PAR_get_token();
if (!MSC_match(KW_ON))
CPR_s_error("ON");
gpre_rel* relation = par_relation(request);
IND index = make_index(request, i_name);
index->ind_relation = relation;
index->ind_flags |= dups ? IND_dup_flag : 0;
index->ind_flags |= descending ? IND_descend : 0;
// create action block
act* action = MSC_action(request, ACT_create_index);
action->act_whenever = gen_whenever();
action->act_object = (REF) index;
// parse field list and create corresponding field blocks
EXP_left_paren(0);
gpre_fld** ptr = &index->ind_fields;
for (;;) {
*ptr = make_field(relation);
ptr = &(*ptr)->fld_next;
if (!MSC_match(KW_COMMA))
break;
}
EXP_match_paren();
return action;
}
//____________________________________________________________
//
// Handle an SQL create shadow statement
//
static act* act_create_shadow(void)
{
gpre_req* request = MSC_request(REQ_ddl);
if (gpreGlob.isc_databases && !gpreGlob.isc_databases->dbb_next)
request->req_database = gpreGlob.isc_databases;
else
PAR_error("Can only CREATE SHADOW in context of single database");
act* action = MSC_action(request, ACT_create_shadow);
action->act_whenever = gen_whenever();
SLONG shadow_number = EXP_USHORT_ordinal(true);
USHORT file_flags = 0;
if (!range_positive_short_integer(shadow_number))
PAR_error("Shadow number out of range");
if (MSC_match(KW_MANUAL))
file_flags |= FIL_manual;
else
MSC_match(KW_AUTO);
if (MSC_match(KW_CONDITIONAL))
file_flags |= FIL_conditional;
FIL file_list, file;
file_list = file = define_file();
if (file->fil_start)
PAR_error("Can not specify file start for first file");
SLONG length = file->fil_length;
file->fil_flags = file_flags;
file->fil_shadow_number = (SSHORT) shadow_number;
while (MSC_match(KW_FILE)) {
file = define_file();
if (!length && !file->fil_start) {
TEXT err_string[1024];
sprintf(err_string,
"Preceding file did not specify length, so %s must include starting page number",
file->fil_name);
PAR_error(err_string);
}
length = file->fil_length;
file->fil_flags = file_flags;
file->fil_next = file_list;
file_list = file;
}
action->act_object = (REF) file_list;
return action;
}
//____________________________________________________________
//
// Handle an SQL create table statement.
//
static act* act_create_table(void)
{
gpre_req* request = MSC_request(REQ_ddl);
gpre_rel* relation = par_relation(request);
if (MSC_match(KW_EXTERNAL)) {
TEXT* string = NULL;
MSC_match(KW_FILE);
if (isQuoted(gpreGlob.token_global.tok_type)) {
string = (TEXT*) MSC_alloc(gpreGlob.token_global.tok_length + 1);
relation->rel_ext_file = string;
MSC_copy(gpreGlob.token_global.tok_string, gpreGlob.token_global.tok_length, string);
PAR_get_token();
}
else
CPR_s_error("<quoted filename>");
if (!check_filename(string))
PAR_error("node name not permitted"); // a node name is not permitted in external file name
}
// CHECK Constraints require the context to be set to the
// current relation
gpre_ctx* context = MSC_context(request);
request->req_contexts = context;
context->ctx_relation = relation;
// Reserve context 1 for relation on which constraint is
// being defined
context->ctx_internal++;
request->req_internal++;
// create action block
act* action = MSC_action(request, ACT_create_table);
action->act_whenever = gen_whenever();
action->act_object = (REF) relation;
EXP_left_paren(0);
gpre_fld** ptr = &relation->rel_fields;
cnstrt** cnstrt_ptr = &relation->rel_constraints;
for (;;) {
switch (gpreGlob.token_global.tok_keyword) {
case KW_CONSTRAINT:
case KW_PRIMARY:
case KW_UNIQUE:
case KW_FOREIGN:
case KW_CHECK:
*cnstrt_ptr = par_table_constraint(request, relation);
cnstrt_ptr = &(*cnstrt_ptr)->cnstrt_next;
break;
default:
// parse field list and create corresponding field blocks
*ptr = par_field(request, relation);
ptr = &(*ptr)->fld_next;
}
if (!MSC_match(KW_COMMA))
break;
}
EXP_match_paren();
return action;
}
//____________________________________________________________
//
// Handle an SQL create view statement.
//
static act* act_create_view(void)
{
gpre_req* request = MSC_request(REQ_ddl);
gpre_rel* relation = par_relation(request);
// create action block
act* action = MSC_action(request, ACT_create_view);
action->act_whenever = gen_whenever();
action->act_object = (REF) relation;
// if field list is present parse it and create corresponding field blocks
if (MSC_match(KW_LEFT_PAREN)) {
gpre_fld** ptr = &relation->rel_fields;
for (;;) {
*ptr = make_field(relation);
ptr = &(*ptr)->fld_next;
if (MSC_match(KW_RIGHT_PAREN))
break;
MSC_match(KW_COMMA);
}
}
// skip 'AS SELECT'
if (!MSC_match(KW_AS))
CPR_s_error("AS");
relation->rel_view_text = CPR_start_text();
if (!MSC_match(KW_SELECT))
CPR_s_error("SELECT");
// reserve context variable 0 for view
request->req_internal++;
// parse the view SELECT
gpre_rse* select = SQE_select(request, true);
relation->rel_view_rse = select;
EXP_rse_cleanup(select);
if (MSC_match(KW_WITH)) {
if (!MSC_match(KW_CHECK))
CPR_s_error("CHECK");
if (!MSC_match(KW_OPTION))
CPR_s_error("OPTION");
relation->rel_flags |= REL_view_check;
}
CPR_end_text(relation->rel_view_text);
return action;
}
//____________________________________________________________
//
// Recognize BEGIN/END DECLARE SECTION,
// and mark it as a good place to put miscellaneous
// global routine stuff.
//
static act* act_d_section( enum act_t type)
{
if (!MSC_match(KW_DECLARE))
CPR_s_error("DECLARE SECTION");
if (!MSC_match(KW_SECTION))
CPR_s_error("SECTION");
MSC_match(KW_SEMI_COLON);
act* action = (act*) MSC_alloc(ACT_LEN);
action->act_type = type;
if (type == ACT_b_declare)
gpreGlob.cur_routine = action; // Hmm, global var.
if (!gpreGlob.isc_databases) {
// allocate database block and link to db chain
gpreGlob.isc_databases = (DBB) MSC_alloc_permanent(DBB_LEN);
// allocate symbol block
gpre_sym* symbol = (gpre_sym*) MSC_alloc_permanent(SYM_LEN);
// make it a database, specifically this one
symbol->sym_type = SYM_database;
symbol->sym_object = (gpre_ctx*) gpreGlob.isc_databases;
symbol->sym_string = gpreGlob.database_name;
// database block points to the symbol block
gpreGlob.isc_databases->dbb_name = symbol;
gpreGlob.isc_databases->dbb_filename = NULL;
gpreGlob.isc_databases->dbb_flags = DBB_sqlca;
gpreGlob.isc_databases->dbb_c_lc_ctype = gpreGlob.module_lc_ctype;
if (gpreGlob.sw_external)
gpreGlob.isc_databases->dbb_scope = DBB_EXTERN;
}
else {
/* Load up the symbol (hash) table with relation names from this database */
MET_load_hash_table(gpreGlob.isc_databases);
}
HSH_insert(gpreGlob.isc_databases->dbb_name);
if (MSC_match(KW_SQL)) {
if (!MSC_match(KW_NAMES))
CPR_s_error("NAMES ARE");
if (!MSC_match(KW_ARE))
CPR_s_error("NAMES ARE");
gpre_sym* symbol = MSC_find_symbol(gpreGlob.token_global.tok_symbol, SYM_charset);
if (!symbol)
PAR_error("The named CHARACTER SET was not found");
if (gpreGlob.module_lc_ctype && !strcmp(gpreGlob.module_lc_ctype, symbol->sym_string))
PAR_error("Duplicate specification of module CHARACTER SET.");
gpreGlob.module_lc_ctype = symbol->sym_string;
gpreGlob.isc_databases->dbb_c_lc_ctype = symbol->sym_string;
CPR_token();
}
return action;
}
//____________________________________________________________
//
// Parse the SQL cursor declaration.
//
static act* act_declare(void)
{
act* action = NULL;
DBB db = NULL;
if (gpreGlob.token_global.tok_symbol && (gpreGlob.token_global.tok_symbol->sym_type == SYM_database)) {
// must be a database specifier in a DECLARE TABLE statement
db = (DBB) gpreGlob.token_global.tok_symbol->sym_object;
PAR_get_token();
if (!MSC_match(KW_DOT))
CPR_s_error(". (period)");
gpre_sym* symbol = PAR_symbol(SYM_dummy);
if (gpreGlob.token_global.tok_keyword != KW_TABLE)
CPR_s_error("TABLE");
return (act_declare_table(symbol, db));
}
switch (gpreGlob.token_global.tok_keyword) {
case KW_FILTER:
return (act_declare_filter());
break;
case KW_EXTERNAL:
PAR_get_token();
if (MSC_match(KW_FUNCTION))
return (act_declare_udf());
else
CPR_s_error("FUNCTION");
break;
}
bool delimited = false;
#ifdef SCROLLABLE_CURSORS
bool scroll = false;
#endif
TEXT t_str[132]; // CVC: is it always enough?
SQL_resolve_identifier("<Cursor Name>", t_str);
if (gpreGlob.token_global.tok_type == tok_dblquoted)
delimited = true;
else {
gpre_sym* symb = HSH_lookup2(gpreGlob.token_global.tok_string);
if (symb &&
(symb->sym_type == SYM_cursor ||
symb->sym_type == SYM_delimited_cursor))
{
char s[64];
sprintf(s, "symbol %s is already in use", t_str);
PAR_error(s);
}
}
gpre_sym* symbol = PAR_symbol(SYM_cursor);
switch (gpreGlob.token_global.tok_keyword) {
case KW_TABLE:
return (act_declare_table(symbol, 0));
#ifdef SCROLLABLE_CURSORS
case KW_SCROLL:
PAR_get_token();
scroll = true;
if (gpreGlob.token_global.tok_keyword != KW_CURSOR)
CPR_s_error("CURSOR");
#endif
case KW_CURSOR:
PAR_get_token();
if (!MSC_match(KW_FOR))
CPR_s_error("FOR");
if (MSC_match(KW_SELECT)) {
gpre_req* request = MSC_request(REQ_cursor);
request->req_flags |= REQ_sql_cursor | REQ_sql_declare_cursor;
#ifdef SCROLLABLE_CURSORS
if (scroll)
request->req_flags |= REQ_scroll;
#endif
symbol->sym_object = (gpre_ctx*) request;
action = MSC_action(request, ACT_cursor);
action->act_object = (REF) symbol;
symbol->sym_type =
(delimited) ? SYM_delimited_cursor : SYM_cursor;
request->req_rse = SQE_select(request, false);
if (MSC_match(KW_FOR)) {
if (!MSC_match(KW_UPDATE))
CPR_s_error("UPDATE");
if (!MSC_match(KW_OF))
CPR_s_error("OF");
do {
CPR_token();
} while (MSC_match(KW_COMMA));
}
EXP_rse_cleanup(request->req_rse);
}
else if (MSC_match(KW_READ)) {
action = act_open_blob(ACT_blob_open, symbol);
symbol->sym_type =
(delimited) ? SYM_delimited_cursor : SYM_cursor;
}
else if (MSC_match(KW_INSERT)) {
action = act_open_blob(ACT_blob_create, symbol);
symbol->sym_type =
(delimited) ? SYM_delimited_cursor : SYM_cursor;
}
else {
DYN statement = par_statement();
symbol->sym_object = (gpre_ctx*) statement;
if (MSC_match(KW_FOR)) {
if (!MSC_match(KW_UPDATE))
CPR_s_error("UPDATE");
if (!MSC_match(KW_OF))
CPR_s_error("OF");
do {
CPR_token();
} while (MSC_match(KW_COMMA));
}
symbol->sym_type = SYM_dyn_cursor;
statement->dyn_cursor_name = symbol;
action = (act*) MSC_alloc(ACT_LEN);
action->act_type = ACT_dyn_cursor;
action->act_object = (REF) statement;
action->act_whenever = gen_whenever();
}
HSH_insert(symbol);
return action;
default:
while (MSC_match(KW_COMMA))
; // empty loop body
if (MSC_match(KW_STATEMENT)) {
action = (act*) MSC_alloc(ACT_LEN);
action->act_type = ACT_dyn_statement;
return action;
}
CPR_s_error("CURSOR, STATEMENT or TABLE");
}
return NULL; // silence compiler
}
//____________________________________________________________
//
// Handle an SQL declare filter statement
//
static act* act_declare_filter(void)
{
gpre_req* request = MSC_request(REQ_ddl);
if (gpreGlob.isc_databases && !gpreGlob.isc_databases->dbb_next)
request->req_database = gpreGlob.isc_databases;
else
PAR_error("Can only DECLARE FILTER in context of single database");
PAR_get_token();
FLTR filter = (FLTR) MSC_alloc(FLTR_LEN);
filter->fltr_name = (TEXT*) MSC_alloc(NAME_SIZE + 1);
SQL_resolve_identifier("<identifier>", filter->fltr_name);
if (gpreGlob.token_global.tok_length > NAME_SIZE)
PAR_error("Filter name too long");
PAR_get_token();
// create action block
act* action = MSC_action(request, ACT_declare_filter);
action->act_whenever = gen_whenever();
action->act_object = (REF) filter;
SLONG input_type;
if (MSC_match(KW_INPUT_TYPE))
input_type = EXP_SSHORT_ordinal(true);
else
CPR_s_error("INPUT_TYPE");
SLONG output_type;
if (MSC_match(KW_OUTPUT_TYPE))
output_type = EXP_SSHORT_ordinal(true);
else
CPR_s_error("OUTPUT_TYPE");
if (!range_short_integer(input_type) || !range_short_integer(output_type))
PAR_error("Blob sub_type out of range");
filter->fltr_input_type = (SSHORT) input_type;
filter->fltr_output_type = (SSHORT) output_type;
if (MSC_match(KW_ENTRY_POINT))
filter->fltr_entry_point = extract_string(true);
else
CPR_s_error("ENTRY_POINT");
if (MSC_match(KW_MODULE_NAME))
filter->fltr_module_name = extract_string(true);
else
CPR_s_error("MODULE_NAME");
return action;
}
//____________________________________________________________
//
// Handle an SQL declare table statement.
//
static act* act_declare_table( gpre_sym* symbol, DBB db)
{
// create a local request block
gpre_req* request = (gpre_req*) MSC_alloc(REQ_LEN);
request->req_type = REQ_ddl;
// create relation block
gpre_rel* relation = make_relation(0, symbol->sym_string);
if (!db)
db = relation->rel_database;
request->req_database = db;
relation->rel_next = db->dbb_relations;
db->dbb_relations = relation;
gpre_fld* dbkey = MET_make_field("rdb$db_key", dtype_text, 8, false);
relation->rel_dbkey = dbkey;
dbkey->fld_flags |= FLD_dbkey | FLD_text | FLD_charset;
dbkey->fld_ttype = ttype_binary;
// if relation name already in incore metadata, remove it & its fields
gpre_sym* old_symbol = HSH_lookup(relation->rel_symbol->sym_string);
while (old_symbol)
{
if (old_symbol->sym_type == SYM_relation) {
gpre_rel* tmp_relation = (gpre_rel*) old_symbol->sym_object;
if (tmp_relation->rel_meta)
PAR_error("Multiple DECLARE TABLE statements for table");
gpre_sym* tmp_symbol = old_symbol->sym_homonym;
HSH_remove(old_symbol);
for (gpre_fld* field = tmp_relation->rel_fields; field;
field = field->fld_next)
{
HSH_remove(field->fld_symbol);
}
old_symbol = tmp_symbol;
}
else
old_symbol = old_symbol->sym_homonym;
}
// add new symbol to incore metadata
HSH_insert(relation->rel_symbol);
// create action block
act* action = (act*) MSC_alloc(ACT_LEN);
action->act_type = ACT_noop;
action->act_object = (REF) relation;
// parse field list and create corresponding field blocks
// include size information for message length calculations
PAR_get_token();
EXP_left_paren(0);
USHORT count = 0;
gpre_fld** ptr = &relation->rel_fields;
for (;;) {
gpre_fld* field = par_field(request, relation);
*ptr = field;
ptr = &field->fld_next;
HSH_insert(field->fld_symbol);
field->fld_position = count++;
field->fld_flags &= ~FLD_meta;
SQL_adjust_field_dtype(field);
if (!MSC_match(KW_COMMA))
break;
}
EXP_match_paren();
return action;
}
//____________________________________________________________
//
// Handle an SQL declare external statement
//
static act* act_declare_udf(void)
{
gpre_req* request = MSC_request(REQ_ddl);
if (gpreGlob.isc_databases && !gpreGlob.isc_databases->dbb_next)
request->req_database = gpreGlob.isc_databases;
else
PAR_error
("Can only DECLARE EXTERNAL FUNCTION in context of single database");
decl_udf* udf_declaration = (decl_udf*) MSC_alloc(DECL_UDF_LEN);
udf_declaration->decl_udf_name = (TEXT*) MSC_alloc(NAME_SIZE + 1);
SQL_resolve_identifier("<identifier>", udf_declaration->decl_udf_name);
if (gpreGlob.token_global.tok_length > NAME_SIZE)
PAR_error("external function name too long");
PAR_get_token();
// create action block
act* action = MSC_action(request, ACT_declare_udf);
action->act_whenever = gen_whenever();
action->act_object = (REF) udf_declaration;
gpre_fld** ptr = &udf_declaration->decl_udf_arg_list;
while (true) {
if (MSC_match(KW_RETURNS)) {
if (MSC_match(KW_PARAMETER)) {
const SLONG return_parameter = EXP_pos_USHORT_ordinal(true);
if (return_parameter > 10)
PAR_error("return parameter not in range");
fb_assert(return_parameter <= MAX_SSHORT);
udf_declaration->decl_udf_return_parameter = (SSHORT) return_parameter;
}
else {
gpre_fld* field = (gpre_fld*) MSC_alloc(FLD_LEN);
field->fld_flags |= (FLD_meta | FLD_meta_cstring);
SQL_par_field_dtype(request, field, true);
SQL_adjust_field_dtype(field);
udf_declaration->decl_udf_return_type = field;
MSC_match(KW_BY);
if (MSC_match(KW_VALUE))
udf_declaration->decl_udf_return_mode = FUN_value;
else
udf_declaration->decl_udf_return_mode = FUN_reference;
}
break;
}
else {
gpre_fld* field = (gpre_fld*) MSC_alloc(FLD_LEN);
field->fld_flags |= (FLD_meta | FLD_meta_cstring);
SQL_par_field_dtype(request, field, true);
SQL_adjust_field_dtype(field);
*ptr = field;
ptr = &(field->fld_next);
MSC_match(KW_COMMA);
}
}
if (MSC_match(KW_ENTRY_POINT))
udf_declaration->decl_udf_entry_point = extract_string(true);
else
CPR_s_error("ENTRY_POINT");
if (MSC_match(KW_MODULE_NAME))
udf_declaration->decl_udf_module_name = extract_string(true);
else
CPR_s_error("MODULE_NAME");
return action;
}
//____________________________________________________________
//
// Parse an update action. This is a little more complicated
// because SQL confuses the update of a cursor with a mass update.
// The syntax, and therefor the code, I fear, is a mess.
//
static act* act_delete(void)
{
const TEXT* transaction;
par_options(&transaction);
if (!MSC_match(KW_FROM))
CPR_s_error("FROM");
// First comes the relation. Unfortunately, there is no way to identify
// its database until the cursor is known. Sigh. Save the token.
TEXT r_name[NAME_SIZE + 1], db_name[NAME_SIZE + 1], owner_name[NAME_SIZE + 1];
SQL_relation_name(r_name, db_name, owner_name);
// Parse the optional alias (context variable)
gpre_sym* alias = (gpreGlob.token_global.tok_symbol) ? NULL : PAR_symbol(SYM_dummy);
// Now the moment of truth. If the next few tokens are WHERE CURRENT OF
// then this is a sub-action of an existing request. If not, then it is
// a free standing request
gpre_req* request = MSC_request(REQ_mass_update);
upd* update = (upd*) MSC_alloc(UPD_LEN);
const bool where = MSC_match(KW_WITH);
if (where && MSC_match(KW_CURRENT)) {
if (!MSC_match(KW_OF))
CPR_s_error("OF <cursor>");
gpreGlob.requests = request->req_next;
gpreGlob.cur_routine->act_object = (REF) request->req_routine; // Beware global var
MSC_free((UCHAR *) request);
request = par_cursor(NULL);
if ((transaction || request->req_trans) &&
(!transaction || !request->req_trans ||
strcmp(transaction, request->req_trans)))
{
if (transaction)
PAR_error("different transaction for select and delete");
else { // does not specify transaction clause in
// "delete ... where cuurent of cursor" stmt
SSHORT trans_nm_len = strlen(request->req_trans);
SCHAR* str_2 = (SCHAR*) MSC_alloc(trans_nm_len + 1);
transaction = str_2;
const SCHAR* str_1 = request->req_trans;
do {
*str_2++ = *str_1++;
} while (--trans_nm_len);
}
}
request->req_trans = transaction;
gpre_rel* relation = SQL_relation(request, r_name, db_name, owner_name, true);
gpre_rse* selection = request->req_rse;
gpre_ctx* context = NULL;
SSHORT i;
for (i = 0; i < selection->rse_count; i++) {
context = selection->rse_context[i];
if (context->ctx_relation == relation)
break;
}
if (i == selection->rse_count)
PAR_error("table not in request");
update->upd_request = request;
update->upd_source = context;
act* action = MSC_action(request, ACT_erase);
action->act_object = (REF) update;
action->act_whenever = gen_whenever();
return action;
}
request->req_trans = transaction;
// How amusing. After all that work, it wasn't a sub-action at all.
// Neat. Take the pieces and build a complete request. Start by
// figuring out what database is involved.
gpre_rel* relation = SQL_relation(request, r_name, db_name, owner_name, true);
gpre_rse* selection = (gpre_rse*) MSC_alloc(RSE_LEN(1));
request->req_rse = selection;
selection->rse_count = 1;
gpre_ctx* context = MSC_context(request);
selection->rse_context[0] = context;
context->ctx_relation = relation;
bool hsh_rm = false;
if (alias && !gpreGlob.token_global.tok_symbol) {
alias->sym_type = SYM_context;
alias->sym_object = context;
context->ctx_symbol = alias;
gpreGlob.token_global.tok_symbol = alias;
HSH_insert(alias);
hsh_rm = true;
}
if (where)
selection->rse_boolean = SQE_boolean(request, 0);
request->req_node = MSC_node(nod_erase, 0);
act* action = MSC_action(request, ACT_loop);
action->act_whenever = gen_whenever();
if (hsh_rm)
HSH_remove(alias);
return action;
}
//____________________________________________________________
//
// Handle an SQL describe statement.
// Reject
//
static act* act_describe(void)
{
bool in_sqlda;
if (MSC_match(KW_INPUT))
in_sqlda = true;
else {
MSC_match(KW_OUTPUT);
in_sqlda = false;
}
DYN statement = par_statement();
if (!MSC_match(KW_INTO)) {
/* check for SQL2 syntax
"USING SQL DESCRIPTOR sqlda" */
if (!MSC_match(KW_USING) || !MSC_match(KW_SQL) || !MSC_match(KW_DESCRIPTOR))
CPR_s_error("INTO or USING SQL DESCRIPTOR sqlda");
}
else if (MSC_match(KW_SQL) && !MSC_match(KW_DESCRIPTOR))
CPR_s_error("INTO SQL DESCRIPTOR sqlda");
statement->dyn_sqlda = PAR_native_value(false, false);
act* action = (act*) MSC_alloc(ACT_LEN);
if (in_sqlda)
action->act_type = ACT_dyn_describe_input;
else
action->act_type = ACT_dyn_describe;
action->act_object = (REF) statement;
action->act_whenever = gen_whenever();
return action;
}
//____________________________________________________________
//
// Parse a FINISH statement.
//
static act* act_disconnect(void)
{
act* action = MSC_action(0, ACT_disconnect);
action->act_whenever = gen_whenever();
bool all = MSC_match(KW_ALL) || MSC_match(KW_DEFAULT);
if (!all) {
if (MSC_match(KW_CURRENT))
PAR_error("DISCONNECT CURRENT not supported");
gpre_sym* test_symbol = gpreGlob.token_global.tok_symbol;
if (!(test_symbol && test_symbol->sym_type == SYM_database))
{
CPR_s_error("ALL, DEFAULT, or <database handle>");
}
while (true) {
gpre_sym* symbol = gpreGlob.token_global.tok_symbol;
if (symbol && symbol->sym_type == SYM_database) {
rdy* ready = (rdy*) MSC_alloc(RDY_LEN);
ready->rdy_next = (rdy*) action->act_object;
action->act_object = (REF) ready;
ready->rdy_database = (DBB) symbol->sym_object;
PAR_get_token();
}
else
CPR_s_error("<database handle>");
if (!MSC_match(KW_COMMA))
break;
}
}
if (gpreGlob.sw_language == lang_ada)
MSC_match(KW_SEMI_COLON);
return action;
}
//____________________________________________________________
//
// Handle an SQL drop statement.
//
static act* act_drop(void)
{
act* action = NULL;
dbb* db = NULL;
gpre_req* request = NULL;
gpre_rel* relation = NULL;
SCHAR* db_string;
TEXT* identifier_name; // it's not deallocated.
switch (gpreGlob.token_global.tok_keyword) {
case KW_DATABASE:
{
PAR_error("DROP DATABASE not supported");
request = MSC_request(REQ_ddl);
PAR_get_token();
if (!isQuoted(gpreGlob.token_global.tok_type))
CPR_s_error("<quoted database name>");
db = (DBB) MSC_alloc(DBB_LEN);
db->dbb_filename = db_string = (TEXT*) MSC_alloc(gpreGlob.token_global.tok_length + 1);
MSC_copy(gpreGlob.token_global.tok_string, gpreGlob.token_global.tok_length, db_string);
gpre_sym* symbol = PAR_symbol(SYM_dummy);
db->dbb_name = symbol;
symbol->sym_type = SYM_database;
symbol->sym_object = (gpre_ctx*) db;
action = MSC_action(request, ACT_drop_database);
action->act_whenever = gen_whenever();
action->act_object = (REF) db;
PAR_get_token();
}
return action;
case KW_DOMAIN:
request = MSC_request(REQ_ddl);
if (gpreGlob.isc_databases && !gpreGlob.isc_databases->dbb_next)
request->req_database = gpreGlob.isc_databases;
else
PAR_error("Can only DROP DOMAIN in context of single database");
PAR_get_token();
identifier_name = (TEXT*) MSC_alloc(NAME_SIZE + 1);
SQL_resolve_identifier("<identifier>", identifier_name);
action = MSC_action(request, ACT_drop_domain);
action->act_whenever = gen_whenever();
action->act_object = (REF) identifier_name;
PAR_get_token();
return action;
case KW_FILTER:
request = MSC_request(REQ_ddl);
if (gpreGlob.isc_databases && !gpreGlob.isc_databases->dbb_next)
request->req_database = gpreGlob.isc_databases;
else
PAR_error("Can only DROP FILTER in context of single database");
PAR_get_token();
identifier_name = (TEXT*) MSC_alloc(NAME_SIZE + 1);
SQL_resolve_identifier("<identifier>", identifier_name);
action = MSC_action(request, ACT_drop_filter);
action->act_whenever = gen_whenever();
action->act_object = (REF) identifier_name;
PAR_get_token();
return action;
case KW_EXTERNAL:
PAR_get_token();
if (!MSC_match(KW_FUNCTION))
CPR_s_error("FUNCTION");
request = MSC_request(REQ_ddl);
if (gpreGlob.isc_databases && !gpreGlob.isc_databases->dbb_next)
request->req_database = gpreGlob.isc_databases;
else
PAR_error
("Can only DROP EXTERNAL FUNCTION in context of a single database");
identifier_name = (TEXT*) MSC_alloc(NAME_SIZE + 1);
SQL_resolve_identifier("<identifier>", identifier_name);
action = MSC_action(request, ACT_drop_udf);
action->act_whenever = gen_whenever();
action->act_object = (REF) identifier_name;
PAR_get_token();
return action;
case KW_INDEX:
{
request = MSC_request(REQ_ddl);
PAR_get_token();
identifier_name = (TEXT*) MSC_alloc(NAME_SIZE + 1);
SQL_resolve_identifier("<identifier>", identifier_name);
IND index = make_index(request, gpreGlob.token_global.tok_string);
action = MSC_action(request, ACT_drop_index);
action->act_whenever = gen_whenever();
action->act_object = (REF) index;
PAR_get_token();
}
return action;
case KW_STOGROUP:
PAR_error("DROP STOGROUP not supported");
case KW_TABLESPACE:
PAR_error("DROP TABLESPACE not supported");
case KW_SYNONYM:
PAR_error("DROP SYNONYM request not allowed");
case KW_SHADOW:
{
request = MSC_request(REQ_ddl);
if (gpreGlob.isc_databases && !gpreGlob.isc_databases->dbb_next)
request->req_database = gpreGlob.isc_databases;
else
PAR_error("Can only DROP SHADOW in context of a single database");
PAR_get_token();
action = MSC_action(request, ACT_drop_shadow);
action->act_whenever = gen_whenever();
SLONG num = EXP_USHORT_ordinal(true);
if (!range_positive_short_integer(num))
PAR_error("Shadow number out of range");
action->act_object = (REF)(IPTR)num;
}
return action;
case KW_TABLE:
request = MSC_request(REQ_ddl);
PAR_get_token();
relation = par_relation(request);
action = MSC_action(request, ACT_drop_table);
action->act_whenever = gen_whenever();
action->act_object = (REF) relation;
return action;
case KW_VIEW:
request = MSC_request(REQ_ddl);
PAR_get_token();
relation = par_relation(request);
action = MSC_action(request, ACT_drop_view);
action->act_whenever = gen_whenever();
action->act_object = (REF) relation;
return action;
default:
PAR_error("Invalid DROP request");
}
return NULL; // silence compiler
}
//____________________________________________________________
//
// Handle an SQL event statement
//
static act* act_event(void)
{
act* action = NULL;
if (MSC_match(KW_INIT))
action = PAR_event_init(true);
else if (MSC_match(KW_WAIT))
action = PAR_event_wait(true);
else
CPR_s_error("INIT or WAIT");
action->act_whenever = gen_whenever();
return action;
}
//____________________________________________________________
//
// Handle an SQL execute statement.
// Reject
//
static act* act_execute(void)
{
if (MSC_match(KW_PROCEDURE))
return act_procedure();
// EXECUTE IMMEDIATE is a different sort of duck
if (MSC_match(KW_IMMEDIATE)) {
if (gpreGlob.isc_databases && gpreGlob.isc_databases->dbb_next) {
TEXT s[ERROR_LENGTH];
sprintf(s,
"Executing dynamic SQL statement in context of database %s",
gpreGlob.isc_databases->dbb_name->sym_string);
CPR_warn(s);
}
DYN statement = (DYN) MSC_alloc(DYN_LEN);
par_options(&statement->dyn_trans);
switch (gpreGlob.sw_sql_dialect) {
case 1:
if ((!isQuoted(gpreGlob.token_global.tok_type)) && (!MSC_match(KW_COLON)))
CPR_s_error(": <string expression>");
break;
default:
if (gpreGlob.token_global.tok_type != tok_sglquoted && (!MSC_match(KW_COLON)))
CPR_s_error(": <string expression>");
break;
}
statement->dyn_string = PAR_native_value(false, false);
par_using(statement);
if (statement->dyn_using)
PAR_error("Using host-variable list not supported.");
par_into(statement);
statement->dyn_database = gpreGlob.isc_databases;
act* action = (act*) MSC_alloc(ACT_LEN);
action->act_type = ACT_dyn_immediate;
action->act_object = (REF) statement;
action->act_whenever = gen_whenever();
return action;
}
// Ordinary form of EXECUTE
const TEXT* transaction;
par_options(&transaction);
DYN statement = par_statement();
statement->dyn_trans = transaction;
par_using(statement);
if (statement->dyn_using)
PAR_error("Using host-variable list not supported.");
par_into(statement);
act* action = (act*) MSC_alloc(ACT_LEN);
action->act_type = ACT_dyn_execute;
action->act_object = (REF) statement;
action->act_whenever = gen_whenever();
return action;
}
//____________________________________________________________
//
// Parse the SQL fetch statement.
//
static act* act_fetch(void)
{
// Handle dynamic SQL statement, if appropriate
DYN cursor = par_dynamic_cursor();
if (cursor) {
DYN statement = (DYN) MSC_alloc(DYN_LEN);
statement->dyn_statement_name = cursor->dyn_statement_name;
statement->dyn_cursor_name = cursor->dyn_cursor_name;
if (MSC_match(KW_USING) || MSC_match(KW_INTO)) {
MSC_match(KW_SQL); // optional for backward compatibility
if (MSC_match(KW_DESCRIPTOR))
statement->dyn_sqlda = PAR_native_value(false, false);
else
statement->dyn_using = (GPRE_NOD) SQE_list(SQE_variable, NULL, false);
if (statement->dyn_using)
PAR_error("Using host-variable list not supported.");
}
act* action = (act*) MSC_alloc(ACT_LEN);
action->act_type = ACT_dyn_fetch;
action->act_object = (REF) statement;
action->act_whenever = gen_whenever();
return action;
}
// Statement is static SQL
#ifdef SCROLLABLE_CURSORS
// parse the fetch orientation
USHORT direction = blr_forward;
const TEXT* direction_string = NULL;
GPRE_NOD offset_node = NULL;
if (!MSC_match(KW_NEXT)) {
if (MSC_match(KW_PRIOR)) {
direction = blr_backward;
direction_string = "1";
}
else if (MSC_match(KW_FIRST)) {
direction = blr_bof_forward;
direction_string = "2";
}
else if (MSC_match(KW_LAST)) {
direction = blr_eof_backward;
direction_string = "3";
}
else if (MSC_match(KW_RELATIVE)) {
direction = blr_forward;
direction_string = "0";
offset_node = SQE_value(0, false, NULL, NULL);
PAR_get_token();
}
else if (MSC_match(KW_ABSOLUTE)) {
direction = blr_bof_forward;
direction_string = "2";
offset_node = SQE_value(0, false, NULL, NULL);
PAR_get_token();
}
}
MSC_match(KW_FROM);
#endif
gpre_req* request = par_cursor(NULL);
#ifdef SCROLLABLE_CURSORS
// if scrolling is required, set up the offset and direction parameters
// to be passed to the running request via the asynchronous message--
// there could be multiple FETCH statements, so we need to store multiple
// value blocks, one for each FETCH statement
if (direction != blr_forward) {
if (!(request->req_flags & REQ_scroll))
PAR_error
("Must use SCROLL modifier for DECLARE CURSOR to enable scrolling.");
// create a literal for the direction parameter
REF reference = request->req_avalues;
if (!reference)
reference = request->req_avalues = (REF) MSC_alloc(REF_LEN);
VAL value = reference->ref_values;
if (!value)
reference->ref_values = value = (VAL) MSC_alloc(VAL_LEN);
else {
while (value->val_next) {
value = value->val_next;
}
value->val_next = (VAL) MSC_alloc(VAL_LEN);
value = value->val_next;
}
TEXT* string = (TEXT*) MSC_alloc(2);
value->val_value = string;
MSC_copy(direction_string, 1, string);
// create a reference to the offset variable or literal
if (!reference->ref_next)
reference->ref_next = (REF) MSC_alloc(REF_LEN);
reference = reference->ref_next;
value = reference->ref_values;
if (!value)
reference->ref_values = value = (VAL) MSC_alloc(VAL_LEN);
else {
while (value->val_next) {
value = value->val_next;
}
value->val_next = (VAL) MSC_alloc(VAL_LEN);
value = value->val_next;
}
if (offset_node)
value->val_value = ((REF) offset_node->nod_arg[0])->ref_value;
else {
const TEXT* offset_string = "1";
string = (TEXT*) MSC_alloc(2);
value->val_value = string;
MSC_copy(offset_string, 1, string);
}
}
#endif
if (request->req_flags & REQ_sql_blob_create)
PAR_error("Fetching from a blob being created is not allowed.");
act* action = MSC_action(request, ACT_fetch);
action->act_whenever = gen_whenever();
if (request->req_flags & REQ_sql_blob_open) {
if (!MSC_match(KW_INTO))
CPR_s_error("INTO");
action->act_object = (REF) SQE_variable(NULL, false, NULL, NULL);
action->act_type = ACT_get_segment;
}
else if (MSC_match(KW_INTO)) {
action->act_object = (REF) SQE_list(SQE_variable, request, false);
gpre_rse* select = request->req_rse;
into(request, select->rse_fields, (GPRE_NOD) action->act_object);
}
return action;
}
//____________________________________________________________
//
// Parse an SQL grant or revoke statement. Set up grant/revoke
// blocks, fill in all of the privilege information, and
// attach them to an action block of type GRANT or REVOKE.
//
static act* act_grant_revoke( enum act_t type)
{
gpre_req* request = MSC_request(REQ_ddl);
PRV priv_block = MSC_privilege_block();
// if it is revoke action, parse the optional grant option for
if (type == ACT_dyn_revoke) {
if (MSC_match(KW_GRANT)) {
if (!MSC_match(KW_OPTION))
CPR_s_error("OPTION");
if (!MSC_match(KW_FOR))
CPR_s_error("FOR");
priv_block->prv_privileges |= PRV_grant_option;
}
}
bool execute_priv = false;
if (MSC_match(KW_ALL)) {
MSC_match(KW_PRIVILEGES); // Keyword 'privileges' is optional
priv_block->prv_privileges = PRV_all;
}
else if (MSC_match(KW_EXECUTE)) {
priv_block->prv_privileges |= PRV_execute;
execute_priv = true;
}
else {
gpre_lls** fields = &priv_block->prv_fields;
while (true) {
if (MSC_match(KW_SELECT))
priv_block->prv_privileges |= PRV_select;
else if (MSC_match(KW_INSERT))
priv_block->prv_privileges |= PRV_insert;
else if (MSC_match(KW_DELETE))
priv_block->prv_privileges |= PRV_delete;
else if (MSC_match(KW_UPDATE)) {
priv_block->prv_privileges |= PRV_update;
if (MSC_match(KW_LEFT_PAREN)) {
SCHAR col_name[NAME_SIZE + 1];
do {
SQL_resolve_identifier("<column name>", col_name);
STR field_name = (STR) MSC_string(col_name);
MSC_push((GPRE_NOD) field_name, fields);
fields = &(*fields)->lls_next;
CPR_token();
} while (MSC_match(KW_COMMA));
if (!MSC_match(KW_RIGHT_PAREN))
CPR_s_error("<right parenthesis>");
}
}
if (!MSC_match(KW_COMMA))
break;
}
}
if (!MSC_match(KW_ON))
CPR_s_error("ON");
STR relation_name = NULL;
SCHAR r_name[NAME_SIZE + 1], db_name[NAME_SIZE + 1], owner_name[NAME_SIZE + 1];
if (execute_priv) {
if (!MSC_match(KW_PROCEDURE))
CPR_s_error("PROCEDURE");
SQL_relation_name(r_name, db_name, owner_name);
gpre_prc* procedure = SQL_procedure(request, r_name, db_name, owner_name, true);
relation_name = (STR) MSC_string(r_name);
priv_block->prv_relation = relation_name;
priv_block->prv_object_dyn = isc_dyn_prc_name;
}
else {
MSC_match(KW_TABLE); // filler word
SQL_relation_name(r_name, db_name, owner_name);
gpre_rel* relation = SQL_relation(request, r_name, db_name, owner_name, true);
relation_name = (STR) MSC_string(r_name);
priv_block->prv_relation = relation_name;
priv_block->prv_object_dyn = isc_dyn_rel_name;
}
if (type == ACT_dyn_grant) {
if (!MSC_match(KW_TO))
CPR_s_error("TO");
}
else { /* type == ACT_dyn_revoke */
if (!MSC_match(KW_FROM))
CPR_s_error("FROM");
}
bool grant_option_legal = true;
gpre_usn* usernames = 0;
gpre_usn* user = 0;
USHORT user_dyn = 0;
SCHAR s[ERROR_LENGTH];
while (true) {
if (MSC_match(KW_PROCEDURE)) {
SQL_relation_name(r_name, db_name, owner_name);
gpre_prc* procedure =
SQL_procedure(request, r_name, db_name, owner_name, true);
user_dyn = isc_dyn_grant_proc;
grant_option_legal = false;
}
else if (MSC_match(KW_TRIGGER)) {
SQL_relation_name(r_name, db_name, owner_name);
if (!MET_trigger_exists(request->req_database, r_name)) {
sprintf(s, "TRIGGER %s not defined", r_name);
PAR_error(s);
}
user_dyn = isc_dyn_grant_trig;
grant_option_legal = false;
}
else if (MSC_match(KW_VIEW)) {
SQL_relation_name(r_name, db_name, owner_name);
if (!MET_get_view_relation
(request, r_name, relation_name->str_string, 0))
{
sprintf(s, "VIEW %s not defined on table %s", r_name,
relation_name->str_string);
PAR_error(s);
}
user_dyn = isc_dyn_grant_view;
grant_option_legal = false;
}
else if (MSC_match(KW_PUBLIC)) {
strcpy(r_name, "PUBLIC");
user_dyn = isc_dyn_grant_user;
}
else {
MSC_match(KW_USER);
if (gpreGlob.token_global.tok_type != tok_ident)
CPR_s_error("<user name identifier>");
else
to_upcase(gpreGlob.token_global.tok_string, r_name);
user_dyn = isc_dyn_grant_user;
CPR_token();
}
if (!usernames) {
usernames = MSC_username(r_name, user_dyn);
user = usernames;
}
else {
user->usn_next = MSC_username(r_name, user_dyn);
user = user->usn_next;
}
if (!MSC_match(KW_COMMA))
break;
}
// If this is a grant, do we have the optional WITH GRANT OPTION specification?
if ((type == ACT_dyn_grant) && grant_option_legal)
if (MSC_match(KW_WITH)) {
if (!MSC_match(KW_GRANT))
CPR_s_error("GRANT");
if (!MSC_match(KW_OPTION))
CPR_s_error("OPTION");
priv_block->prv_privileges |= PRV_grant_option;
}
// create action block
act* action = MSC_action(request, type);
action->act_next = 0;
PRV last_priv_block = priv_block;
bool first = true;
for (user = usernames; user; user = user->usn_next) {
// create and fill privilege block
priv_block = MSC_privilege_block();
priv_block->prv_username = user->usn_name;
priv_block->prv_user_dyn = user->usn_dyn;
priv_block->prv_privileges = last_priv_block->prv_privileges;
priv_block->prv_relation = last_priv_block->prv_relation;
priv_block->prv_object_dyn = last_priv_block->prv_object_dyn;
priv_block->prv_fields = last_priv_block->prv_fields;
if (first) {
action->act_object = (REF) priv_block;
first = false;
}
else
last_priv_block->prv_next = priv_block;
last_priv_block = priv_block;
}
action->act_request = request;
action->act_whenever = gen_whenever();
return action;
}
//____________________________________________________________
//
//
static act* act_include(void)
{
PAR_get_token();
MSC_match(KW_SEMI_COLON);
act* action = (act*) MSC_alloc(ACT_LEN);
action->act_type = ACT_b_declare;
gpreGlob.cur_routine = action; // Hmm, global var
if (!gpreGlob.isc_databases) {
// allocate database block and link to db chain
gpreGlob.isc_databases = (DBB) MSC_alloc_permanent(DBB_LEN);
// allocate symbol block
gpre_sym* symbol = (gpre_sym*) MSC_alloc_permanent(SYM_LEN);
// make it a database, specifically this one
symbol->sym_type = SYM_database;
symbol->sym_object = (gpre_ctx*) gpreGlob.isc_databases;
symbol->sym_string = gpreGlob.database_name;
// database block points to the symbol block
gpreGlob.isc_databases->dbb_name = symbol;
gpreGlob.isc_databases->dbb_filename = NULL;
gpreGlob.isc_databases->dbb_flags = DBB_sqlca;
gpreGlob.isc_databases->dbb_c_lc_ctype = gpreGlob.module_lc_ctype;
if (gpreGlob.sw_external)
gpreGlob.isc_databases->dbb_scope = DBB_EXTERN;
}
else
/* Load the symbol (hash) table with relation names from this database. */
MET_load_hash_table(gpreGlob.isc_databases);
HSH_insert(gpreGlob.isc_databases->dbb_name);
return action;
}
//____________________________________________________________
//
// Process SQL INSERT statement.
//
static act* act_insert(void)
{
const TEXT* transaction = NULL;
par_options(&transaction);
if (MSC_match(KW_CURSOR))
return act_insert_blob(transaction);
if (!MSC_match(KW_INTO))
CPR_s_error("INTO");
gpre_req* request = MSC_request(REQ_insert);
request->req_trans = transaction;
gpre_ctx* context = SQE_context(request);
int count = 0, count2 = 0;
gpre_lls* fields = NULL;
// Pick up a field list
if (!MSC_match(KW_LEFT_PAREN)) {
GPRE_NOD list = MET_fields(context);
count = list->nod_count;
for (int i = 0; i < count; i++)
MSC_push(list->nod_arg[i], &fields);
}
else {
do {
GPRE_NOD node = SQE_field(request, false);
if (node->nod_type == nod_array) {
node->nod_type = nod_field;
// Make sure no subscripts are specified
if (node->nod_arg[1]) {
PAR_error("Partial insert of arrays not permitted");
}
}
// Dialect 1 program may not insert new datatypes
if ((SQL_DIALECT_V5 == gpreGlob.sw_sql_dialect) &&
(nod_field == node->nod_type))
{
const USHORT field_dtype =
((REF) (node->nod_arg[0]))->ref_field->fld_dtype;
if ((dtype_sql_date == field_dtype)
|| (dtype_sql_time == field_dtype)
|| (dtype_int64 == field_dtype))
{
SQL_dialect1_bad_type(field_dtype);
}
}
MSC_push(node, &fields);
count++;
} while (MSC_match(KW_COMMA));
EXP_match_paren();
}
gpre_lls* values = NULL;
if (MSC_match(KW_VALUES)) {
// Now pick up a value list
EXP_left_paren(0);
for (;;) {
if (MSC_match(KW_NULL))
MSC_push(MSC_node(nod_null, 0), &values);
else
MSC_push(SQE_value(request, false, NULL, NULL), &values);
count2++;
if (!(MSC_match(KW_COMMA)))
break;
}
EXP_match_paren();
// Make an assignment list
if (count != count2)
PAR_error("count of values doesn't match count of columns");
GPRE_NOD vlist = MSC_node(nod_list, (SSHORT) count);
request->req_node = vlist;
GPRE_NOD* ptr = &vlist->nod_arg[count];
while (values) {
GPRE_NOD assignment = MSC_node(nod_assignment, 2);
assignment->nod_arg[0] = (GPRE_NOD) MSC_pop(&values);
assignment->nod_arg[1] = (GPRE_NOD) MSC_pop(&fields);
pair(assignment->nod_arg[0], assignment->nod_arg[1]);
*--ptr = assignment;
}
if (context->ctx_symbol)
HSH_remove(context->ctx_symbol);
act* action = MSC_action(request, ACT_insert);
action->act_whenever = gen_whenever();
return action;
}
if (!MSC_match(KW_SELECT))
CPR_s_error("VALUES or SELECT");
// OK, we've got a mass insert on our hands. Start by picking
// up the select statement. First, however, remove the INSERT
// context to avoid resolving SELECT fields to the insert relation.
request->req_type = REQ_mass_update;
request->req_contexts = NULL;
request->req_update = context;
gpre_rse* select = SQE_select(request, false);
request->req_rse = select;
context->ctx_next = request->req_contexts;
request->req_contexts = context;
// Build an assignment list from select expressions into target list
GPRE_NOD select_list = select->rse_fields;
if (count != select_list->nod_count)
PAR_error("count of values doesn't match count of columns");
GPRE_NOD alist = MSC_node(nod_list, (SSHORT) count);
request->req_node = alist;
GPRE_NOD* ptr = &alist->nod_arg[count];
GPRE_NOD* ptr2 = &select_list->nod_arg[count];
while (fields) {
GPRE_NOD assignment = MSC_node(nod_assignment, 2);
assignment->nod_arg[0] = *--ptr2;
assignment->nod_arg[1] = (GPRE_NOD) MSC_pop(&fields);
pair(assignment->nod_arg[0], assignment->nod_arg[1]);
*--ptr = assignment;
}
GPRE_NOD store = MSC_binary(nod_store, (GPRE_NOD) context, alist);
request->req_node = store;
EXP_rse_cleanup(select);
if (context->ctx_symbol)
HSH_remove(context->ctx_symbol);
act* action = MSC_action(request, ACT_loop);
action->act_whenever = gen_whenever();
return action;
}
//____________________________________________________________
//
// Process SQL INSERT statement.
//
// Do I miss anything here? The parameter is not used!
// TEXT is supposedly to be transaction.
static act* act_insert_blob(const TEXT* transaction)
{
// Handle dynamic SQL statement, if appropriate
DYN cursor = par_dynamic_cursor();
if (cursor) {
DYN statement = (DYN) MSC_alloc(DYN_LEN);
statement->dyn_statement_name = cursor->dyn_statement_name;
statement->dyn_cursor_name = cursor->dyn_cursor_name;
par_using(statement);
if (statement->dyn_using)
PAR_error("Using host-variable list not supported.");
act* action = (act*) MSC_alloc(ACT_LEN);
action->act_type = ACT_dyn_insert;
action->act_object = (REF) statement;
action->act_whenever = gen_whenever();
return action;
}
// Statement is static SQL
gpre_req* request = par_cursor(NULL);
if (request->req_flags & REQ_sql_blob_open)
PAR_error("Inserting into a blob being opened is not allowed.");
act* action = MSC_action(request, ACT_put_segment);
action->act_whenever = gen_whenever();
if (!MSC_match(KW_VALUES))
CPR_s_error("VALUES");
EXP_left_paren(0);
action->act_object = (REF) SQE_variable(NULL, false, NULL, NULL);
if (!action->act_object->ref_null_value)
PAR_error("A segment length is required.");
EXP_match_paren();
return action;
}
//____________________________________________________________
//
// Handle an SQL lock statement.
// Reject
//
static act* act_lock(void)
{
PAR_error("SQL LOCK TABLE request not allowed");
return NULL; // silence compiler
}
//____________________________________________________________
//
// Handle the SQL actions OPEN and CLOSE cursors.
//
static act* act_openclose( enum act_t type)
{
const TEXT* transaction = 0;
if (type == ACT_open)
par_options(&transaction);
// Handle dynamic SQL statement, if appropriate
DYN cursor = par_dynamic_cursor();
if (cursor) {
DYN statement = (DYN) MSC_alloc(DYN_LEN);
statement->dyn_statement_name = cursor->dyn_statement_name;
statement->dyn_cursor_name = cursor->dyn_cursor_name;
act* action = (act*) MSC_alloc(ACT_LEN);
action->act_object = (REF) statement;
action->act_whenever = gen_whenever();
if (type == ACT_open) {
action->act_type = ACT_dyn_open;
statement->dyn_trans = transaction;
par_using(statement);
if (statement->dyn_using)
PAR_error("Using host-variable list not supported.");
par_into(statement);
}
else
action->act_type = ACT_dyn_close;
return action;
}
// Statement is static SQL
gpre_sym* symbol = NULL;
gpre_req* request = par_cursor(&symbol);
act* action = MSC_action(request, type);
if (type == ACT_open) {
open_cursor* open = (open_cursor*) MSC_alloc(OPN_LEN);
open->opn_trans = transaction;
open->opn_cursor = symbol;
action->act_object = (REF) open;
if (transaction != NULL)
request->req_trans = transaction;
if (request->req_flags & (REQ_sql_blob_open | REQ_sql_blob_create)) {
if (request->req_flags & REQ_sql_blob_open) {
if (!MSC_match(KW_USING))
CPR_s_error("USING");
}
else if (!MSC_match(KW_INTO))
CPR_s_error("INTO");
REF opn_using = (REF) SQE_variable(NULL, false, NULL, NULL);
open->opn_using = opn_using;
opn_using->ref_next = request->req_blobs->blb_reference;
request->req_blobs->blb_reference = opn_using;
opn_using->ref_context = request->req_contexts;
opn_using->ref_field = request->req_references->ref_field;
}
}
else
action->act_object = (REF) symbol;
action->act_whenever = gen_whenever();
if (request->req_flags & (REQ_sql_blob_open | REQ_sql_blob_create))
action->act_type = (type == ACT_close) ? ACT_blob_close :
(request->
req_flags & REQ_sql_blob_open) ? ACT_blob_open : ACT_blob_create;
return action;
}
//____________________________________________________________
//
// Parse an "open blob" type statement.
// These include READ BLOB and INSERT BLOB.
//
static act* act_open_blob( ACT_T act_op, gpre_sym* symbol)
{
if (!MSC_match(KW_BLOB))
CPR_s_error("BLOB");
// if the token isn't an identifier, complain
TOK f_token = (TOK) MSC_alloc(TOK_LEN);
f_token->tok_length = gpreGlob.token_global.tok_length;
SQL_resolve_identifier("<column_name>", f_token->tok_string);
CPR_token();
if (act_op == ACT_blob_open) {
if (!MSC_match(KW_FROM))
CPR_s_error("FROM");
}
else if (!MSC_match(KW_INTO))
CPR_s_error("INTO");
gpre_req* request = MSC_request(REQ_cursor);
request->req_flags =
(act_op == ACT_blob_open) ? REQ_sql_blob_open : REQ_sql_blob_create;
SCHAR r_name[NAME_SIZE + 1], db_name[NAME_SIZE + 1], owner_name[NAME_SIZE + 1];
SQL_relation_name(r_name, db_name, owner_name);
SCHAR s[128];
gpre_rel* relation = SQL_relation(request, r_name, db_name, owner_name, true);
gpre_fld* field = MET_field(relation, f_token->tok_string);
if (!field) {
sprintf(s, "column \"%s\" not in context", f_token->tok_string);
PAR_error(s);
}
if (!(field->fld_flags & FLD_blob)) {
sprintf(s, "column %s is not a BLOB", field->fld_symbol->sym_string);
PAR_error(s);
}
if (field->fld_array_info) {
sprintf(s, "column %s is an array and can not be opened as a BLOB",
field->fld_symbol->sym_string);
PAR_error(s);
}
REF reference = MSC_reference(0);
reference->ref_field = field;
gpre_ctx* context = MSC_context(request);
context->ctx_relation = relation;
blb* blob = (blb*) MSC_alloc(BLB_LEN);
blob->blb_symbol = symbol;
blob->blb_request = request;
blob->blb_next = request->req_blobs;
symbol->sym_object = (gpre_ctx*) request;
symbol->sym_type = SYM_cursor;
request->req_references = reference;
request->req_blobs = blob;
if (MSC_match(KW_FILTER)) {
if (MSC_match(KW_FROM)) {
blob->blb_const_from_type =
PAR_blob_subtype(request->req_database);
if (gpreGlob.token_global.tok_keyword == KW_CHAR)
if (blob->blb_const_from_type == isc_blob_text) {
blob->blb_from_charset = par_char_set();
if (act_op == ACT_blob_open
&& blob->blb_from_charset != field->fld_charset_id)
{
PAR_error
("Specified CHARACTER SET does not match BLOB column declaration.");
}
}
else
PAR_error("Only text BLOBS can specify CHARACTER SET");
else if (blob->blb_const_from_type == isc_blob_text)
if (act_op == ACT_blob_create)
blob->blb_from_charset = CS_dynamic;
else
blob->blb_from_charset = field->fld_charset_id;
}
else {
blob->blb_const_from_type = field->fld_sub_type;
if (blob->blb_const_from_type == isc_blob_text)
if (act_op == ACT_blob_create)
blob->blb_from_charset = CS_dynamic;
else
blob->blb_from_charset = field->fld_charset_id;
}
if (!MSC_match(KW_TO))
CPR_s_error("TO");
blob->blb_const_to_type = PAR_blob_subtype(request->req_database);
if (gpreGlob.token_global.tok_keyword == KW_CHAR)
if (blob->blb_const_to_type == isc_blob_text) {
blob->blb_to_charset = par_char_set();
if (act_op == ACT_blob_create
&& blob->blb_to_charset != field->fld_charset_id)
{
PAR_error
("Specified CHARACTER SET does not match BLOB column declaration.");
}
}
else
PAR_error("Only text BLOBS can specify CHARACTER SET");
else if (blob->blb_const_to_type == isc_blob_text)
if (act_op == ACT_blob_create)
blob->blb_to_charset = field->fld_charset_id;
else
blob->blb_to_charset = CS_dynamic;
}
else { // No FILTER keyword seen
/*
* Even if no FILTER was specified, we set one up for the special
* case of InterBase TEXT blobs, in order to do character set
* transliteration from the column-declared character set of the
* blob to the process character set (CS_dynamic).
*
* It is necessary to pass this information in the bpb as blob
* operations are done using blob_ids, and we cannot determine
* this information from the blob_id within the engine.
*/
if (field->fld_sub_type == isc_blob_text
&& (field->fld_charset_id != CS_NONE))
{
blob->blb_const_from_type = isc_blob_text;
blob->blb_const_to_type = isc_blob_text;
if (act_op == ACT_blob_create) {
blob->blb_from_charset = CS_dynamic;
blob->blb_to_charset = field->fld_charset_id;
}
else {
blob->blb_from_charset = field->fld_charset_id;
blob->blb_to_charset = CS_dynamic;
}
}
}
if (MSC_match(KW_MAX_SEGMENT))
blob->blb_seg_length = EXP_USHORT_ordinal(true);
else
blob->blb_seg_length = field->fld_seg_length;
if (!blob->blb_seg_length)
blob->blb_seg_length = 512;
act* action = MSC_action(request, ACT_cursor);
action->act_object = (REF) blob;
return action;
}
//____________________________________________________________
//
// Handle an SQL prepare statement.
//
static act* act_prepare(void)
{
if (gpreGlob.isc_databases && gpreGlob.isc_databases->dbb_next) {
TEXT s[ERROR_LENGTH];
sprintf(s,
"Executing dynamic SQL statement in context of database %s",
gpreGlob.isc_databases->dbb_name->sym_string);
CPR_warn(s);
}
const TEXT* transaction = NULL;
par_options(&transaction);
DYN statement = par_statement();
statement->dyn_database = gpreGlob.isc_databases;
statement->dyn_trans = transaction;
if (MSC_match(KW_INTO)) {
if (MSC_match(KW_SQL) && !MSC_match(KW_DESCRIPTOR))
CPR_s_error("INTO SQL DESCRIPTOR sqlda");
statement->dyn_sqlda = PAR_native_value(false, false);
}
if (!MSC_match(KW_FROM))
CPR_s_error("FROM");
switch (gpreGlob.sw_sql_dialect) {
case 1:
if ((!isQuoted(gpreGlob.token_global.tok_type)) && (!MSC_match(KW_COLON)))
CPR_s_error(": <string expression>");
break;
default:
if (gpreGlob.token_global.tok_type != tok_sglquoted && (!MSC_match(KW_COLON)))
CPR_s_error(": <string expression>");
break;
}
statement->dyn_string = PAR_native_value(false, false);
act* action = (act*) MSC_alloc(ACT_LEN);
action->act_type = ACT_dyn_prepare;
action->act_object = (REF) statement;
action->act_whenever = gen_whenever();
return action;
}
//____________________________________________________________
//
// Handle the EXECUTE PROCEDURE statement.
//
static act* act_procedure(void)
{
gpre_req* request = MSC_request(REQ_procedure);
par_options(&request->req_trans);
SCHAR p_name[NAME_SIZE + 1], db_name[NAME_SIZE + 1],
owner_name[NAME_SIZE + 1];
SQL_relation_name(p_name, db_name, owner_name);
gpre_prc* procedure = SQL_procedure(request, p_name, db_name, owner_name, true);
gpre_lls* values = NULL;
SSHORT inputs = 0;
if (!(gpreGlob.token_global.tok_keyword == KW_RETURNING) && !(gpreGlob.token_global.tok_keyword == KW_SEMI_COLON))
{
// parse input references
bool paren = MSC_match(KW_LEFT_PAREN);
gpre_fld* field = procedure->prc_inputs;
REF *ref_ptr = &request->req_values;
do {
if (MSC_match(KW_NULL))
MSC_push(MSC_node(nod_null, 0), &values);
else {
REF reference = SQE_parameter(request, false);
*ref_ptr = reference;
reference->ref_field = field;
MSC_push(MSC_unary(nod_value, (GPRE_NOD) reference), &values);
ref_ptr = &reference->ref_next;
}
if (field)
field = field->fld_next;
inputs++;
} while (MSC_match(KW_COMMA));
if (paren)
EXP_match_paren();
}
SSHORT outputs = 0;
if (MSC_match(KW_RETURNING)) {
// parse output references
bool paren = MSC_match(KW_LEFT_PAREN);
gpre_fld* field = procedure->prc_outputs;
REF *ref_ptr = &request->req_references;
do {
REF reference = (REF) SQE_variable(request, false, NULL, NULL);
*ref_ptr = reference;
if (reference->ref_field = field)
field = field->fld_next;
ref_ptr = &reference->ref_next;
outputs++;
} while (MSC_match(KW_COMMA));
if (paren)
EXP_match_paren();
}
if (procedure->prc_in_count != inputs)
PAR_error("count of input values doesn't match count of parameters");
if (procedure->prc_out_count != outputs)
PAR_error("count of output values doesn't match count of parameters");
GPRE_NOD list = MSC_node(nod_list, inputs);
request->req_node = list;
GPRE_NOD* ptr = &list->nod_arg[inputs];
while (values)
*--ptr = (GPRE_NOD) MSC_pop(&values);
act* action = MSC_action(request, ACT_procedure);
action->act_object = (REF) procedure;
action->act_whenever = gen_whenever();
return action;
}
//____________________________________________________________
//
// Handle the stand alone SQL select statement.
//
static act* act_select(void)
{
gpre_req* request = MSC_request(REQ_for);
par_options(&request->req_trans);
gpre_rse* select = SQE_select(request, false);
request->req_rse = select;
if (!MSC_match(KW_SEMI_COLON)) {
TEXT s[ERROR_LENGTH];
sprintf(s, "Expected ';', got %s.", gpreGlob.token_global.tok_string);
CPR_warn(s);
}
if (select->rse_into)
into(request, select->rse_fields, select->rse_into);
act* action = MSC_action(request, ACT_select);
action->act_object = (REF) select->rse_into;
action->act_whenever = gen_whenever();
EXP_rse_cleanup(select);
return action;
}
//____________________________________________________________
//
// Parse a SET <something>
//
static act* act_set(const TEXT* base_directory)
{
if (MSC_match(KW_TRANSACTION))
return act_set_transaction();
if (MSC_match(KW_NAMES))
return act_set_names();
if (MSC_match(KW_STATISTICS))
return act_set_statistics();
if (MSC_match(KW_SCHEMA) || MSC_match(KW_DATABASE))
return PAR_database(true, base_directory);
if (MSC_match(KW_GENERATOR))
return act_set_generator();
if (MSC_match(KW_SQL)) {
if (MSC_match(KW_DIALECT))
return act_set_dialect();
}
CPR_s_error
("TRANSACTION, NAMES, SCHEMA, DATABASE, GENERATOR, DIALECT or STATISTICS");
return NULL; // silence compiler
}
//____________________________________________________________
//
// Parse a SET SQL DIALECT
//
static act* act_set_dialect(void)
{
act* action = (act*) MSC_alloc(ACT_LEN);
action->act_type = ACT_sql_dialect;
USHORT dialect = EXP_USHORT_ordinal(false);
if ((dialect < 1) || (dialect > 3))
CPR_s_error("SQL DIALECT 1,2 or 3");
if (gpreGlob.isc_databases && dialect != gpreGlob.compiletime_db_dialect
&& gpreGlob.sw_ods_version < 10)
{
char warn_mesg[100];
sprintf(warn_mesg,
"Pre 6.0 database. Cannot use dialect %d, Resetting to %d\n",
dialect, SQL_DIALECT_V5);
dialect = SQL_DIALECT_V5;
CPR_warn(warn_mesg);
}
else if (gpreGlob.isc_databases && dialect != gpreGlob.compiletime_db_dialect) {
char warn_mesg[100];
sprintf(warn_mesg,
"Client dialect set to %d. Compiletime database dialect is %d\n",
dialect, gpreGlob.compiletime_db_dialect);
CPR_warn(warn_mesg);
}
action->act_object = (REF) MSC_alloc(SDT_LEN);
((SDT) action->act_object)->sdt_dialect = dialect;
// Needed because subsequent parsing pass1 looks at sw_Sql_dialect value
gpreGlob.sw_sql_dialect = dialect;
gpreGlob.dialect_specified = true;
PAR_get_token();
return action;
}
//____________________________________________________________
//
// Parse a SET generator
//
static act* act_set_generator(void)
{
gpre_req* request = MSC_request(REQ_set_generator);
if (gpreGlob.isc_databases && !gpreGlob.isc_databases->dbb_next)
request->req_database = gpreGlob.isc_databases;
else
PAR_error("Can SET GENERATOR in context of single database only");
if (gpreGlob.token_global.tok_length > NAME_SIZE)
PAR_error("Generator name too long");
SGEN setgen = (SGEN) MSC_alloc(SGEN_LEN);
setgen->sgen_name = (TEXT*) MSC_alloc(gpreGlob.token_global.tok_length + 1);
SQL_resolve_identifier("<identifier>", setgen->sgen_name);
if (!MET_generator(setgen->sgen_name, request->req_database)) {
SCHAR s[128];
sprintf(s, "generator %s not found", gpreGlob.token_global.tok_string);
PAR_error(s);
}
PAR_get_token();
MSC_match(KW_TO);
if ((gpreGlob.sw_sql_dialect == SQL_DIALECT_V5) || (gpreGlob.sw_server_version < 6))
{
setgen->sgen_value = EXP_SLONG_ordinal(true);
setgen->sgen_dialect = SQL_DIALECT_V5;
}
else {
// ** dialect is > 1. Server can handle int64 *
setgen->sgen_int64value = EXP_SINT64_ordinal(true);
setgen->sgen_dialect = SQL_DIALECT_V5 + 1;
}
act* action = (act*) MSC_action(request, ACT_s_start);
action->act_whenever = gen_whenever();
action->act_object = (REF) setgen;
return action;
}
//____________________________________________________________
//
// Parse a SET NAMES <charset>;
//
static act* act_set_names(void)
{
if (gpreGlob.sw_auto)
CPR_warn("SET NAMES requires -manual switch to gpre.");
act* action = (act*) MSC_alloc(ACT_LEN);
action->act_type = ACT_noop;
if (MSC_match(KW_COLON)) {
/* User is specifying a host variable or string as
* the character set. Make this the run-time set.
*/
TEXT* value = PAR_native_value(false, false);
for (dbb* db = gpreGlob.isc_databases; db; db = db->dbb_next) {
if (db->dbb_r_lc_ctype) {
char buffer[256];
sprintf(buffer,
"Supersedes runtime character set for database %s",
(db->dbb_filename) ?
db->dbb_filename : db->dbb_name->sym_string);
CPR_warn(buffer);
}
db->dbb_r_lc_ctype = value;
}
}
else if (gpreGlob.token_global.tok_type == tok_ident) {
// User is specifying the name of a character set
// Make this the compile time character set
TEXT* value = (TEXT*) MSC_alloc(gpreGlob.token_global.tok_length + 1);
MSC_copy(gpreGlob.token_global.tok_string, gpreGlob.token_global.tok_length, value);
value[gpreGlob.token_global.tok_length] = '\0';
/* Due to the ambiguities involved in having modules expressed
* in multiple compile-time character sets, we disallow it.
*/
if (gpreGlob.module_lc_ctype && strcmp(gpreGlob.module_lc_ctype, value) != 0)
PAR_error("Duplicate declaration of module CHARACTER SET");
gpreGlob.module_lc_ctype = value;
for (dbb* db = gpreGlob.isc_databases; db; db = db->dbb_next) {
if (db->dbb_c_lc_ctype) {
char buffer[256];
sprintf(buffer, "Supersedes character set for database %s",
(db->dbb_filename) ?
db->dbb_filename : db->dbb_name->sym_string);
CPR_warn(buffer);
}
db->dbb_c_lc_ctype = value;
if (!(db->dbb_flags & DBB_sqlca)) {
/* Verify that character set name is valid,
* this requires a database to be previously declared
* so we can resolve against it.
* So what if we go through this code once for each database...
*/
if (!(MSC_find_symbol(gpreGlob.token_global.tok_symbol, SYM_charset)))
PAR_error("The named CHARACTER SET was not found");
}
}
CPR_token();
}
else
CPR_s_error("<character set name> or :<hostvar>");
return action;
}
//____________________________________________________________
//
// Parse a SET statistics
//
static act* act_set_statistics(void)
{
gpre_req* request = MSC_request(REQ_ddl);
STS stats = (STS) MSC_alloc(STS_LEN);
if (gpreGlob.isc_databases && !gpreGlob.isc_databases->dbb_next)
request->req_database = gpreGlob.isc_databases;
else
PAR_error("Can SET STATISTICS in context of single database only");
if (MSC_match(KW_INDEX)) {
stats->sts_flags = STS_index;
stats->sts_name = (STR) MSC_alloc(NAME_SIZE + 1);
SQL_resolve_identifier("<index name>", stats->sts_name->str_string);
if (gpreGlob.token_global.tok_length > NAME_SIZE)
PAR_error("Index name too long");
PAR_get_token();
}
else
CPR_s_error("INDEX");
act* action = (act*) MSC_action(request, ACT_statistics);
action->act_object = (REF) stats;
return action;
}
//____________________________________________________________
//
// Generate a set transaction
//
static act* act_set_transaction(void)
{
gpre_tra* trans = (gpre_tra*) MSC_alloc(TRA_LEN);
if (MSC_match(KW_NAME))
trans->tra_handle = PAR_native_value(false, true);
// Get all the transaction parameters
while (true) {
if (MSC_match(KW_ISOLATION)) {
MSC_match(KW_LEVEL);
if (!par_transaction_modes(trans, true))
CPR_s_error("SNAPSHOT");
continue;
}
if (par_transaction_modes(trans, false))
continue;
if (MSC_match(KW_NO)) {
if (MSC_match(KW_WAIT)) {
trans->tra_flags |= TRA_nw;
continue;
}
CPR_s_error("WAIT");
}
if (MSC_match(KW_WAIT))
continue;
#ifdef DEV_BUILD
if (MSC_match(KW_AUTOCOMMIT)) {
trans->tra_flags |= TRA_autocommit;
continue;
}
#endif
if (MSC_match(KW_NO_AUTO_UNDO)) {
trans->tra_flags |= TRA_no_auto_undo;
continue;
}
break;
}
// send out for the list of reserved relations
if (MSC_match(KW_RESERVING)) {
trans->tra_flags |= TRA_rrl;
PAR_reserving(trans->tra_flags, true);
}
else if (MSC_match(KW_USING)) {
trans->tra_flags |= TRA_inc;
PAR_using_db();
}
CMP_t_start(trans);
act* action = (act*) MSC_alloc(ACT_LEN);
action->act_type = ACT_start;
action->act_object = (REF) trans;
action->act_whenever = gen_whenever();
return action;
}
//____________________________________________________________
//
// Generate a COMMIT, FINISH, or ROLLBACK.
//
static act* act_transaction( enum act_t type)
{
const TEXT* transaction = NULL;
par_options(&transaction);
MSC_match(KW_WORK);
act* action = (act*) MSC_alloc(ACT_LEN);
action->act_type = type;
action->act_whenever = gen_whenever();
action->act_object = (REF) transaction;
if (MSC_match(KW_RELEASE)) {
type = (type == ACT_commit) ? ACT_finish : ACT_rfinish;
if (transaction) {
action->act_rest = (act*) MSC_alloc(ACT_LEN);
action->act_rest->act_type = type;
}
else
action->act_type = type;
}
else if ((type == ACT_commit) && (MSC_match(KW_RETAIN))) {
MSC_match(KW_SNAPSHOT);
action->act_type = type = ACT_commit_retain_context;
}
return action;
}
//____________________________________________________________
//
// Parse an update action. This is a little more complicated
// because SQL confuses the update of a cursor with a mass update.
// The syntax, and therefor the code, I fear, is a mess.
//
static act* act_update(void)
{
const TEXT* transaction = NULL;
par_options(&transaction);
// First comes the relation. Unfortunately, there is no way to identify
// its database until the cursor is known. Sigh. Save the token.
SCHAR r_name[NAME_SIZE + 1], db_name[NAME_SIZE + 1], owner_name[NAME_SIZE + 1];
SQL_relation_name(r_name, db_name, owner_name);
// Parse the optional alias (context variable)
gpre_sym* alias = (gpreGlob.token_global.tok_symbol) ? NULL : PAR_symbol(SYM_dummy);
// Now we need the SET list list. Do this thru a linked list stack
if (!MSC_match(KW_SET))
CPR_s_error("SET");
gpre_req* request = MSC_request(REQ_mass_update);
gpre_rel* relation = SQL_relation(request, r_name, db_name, owner_name, true);
gpre_ctx* input_context = MSC_context(request);
input_context->ctx_relation = relation;
if (alias) {
alias->sym_type = SYM_context;
alias->sym_object = input_context;
HSH_insert(alias);
gpreGlob.token_global.tok_symbol = HSH_lookup(gpreGlob.token_global.tok_string);
}
gpre_lls* stack = NULL;
SSHORT count = 0;
do {
GPRE_NOD set_item = MSC_node(nod_assignment, 2);
set_item->nod_arg[1] = SQE_field(NULL, false);
if (!MSC_match(KW_EQUALS))
CPR_s_error("assignment operator");
if (MSC_match(KW_NULL))
set_item->nod_arg[0] = MSC_node(nod_null, 0);
else
set_item->nod_arg[0] = SQE_value(request, false, NULL, NULL);
MSC_push(set_item, &stack);
count++;
} while (MSC_match(KW_COMMA));
GPRE_NOD set_list = MSC_node(nod_list, count);
GPRE_NOD* end_list = set_list->nod_arg + count;
GPRE_NOD* ptr = end_list;
while (stack)
*--ptr = (GPRE_NOD) MSC_pop(&stack);
// Now the moment of truth. If the next few tokens are WHERE CURRENT OF
// then this is a sub-action of an existing request. If not, then it is
// a free standing request
const bool where = MSC_match(KW_WITH);
if (where && MSC_match(KW_CURRENT)) {
if (!MSC_match(KW_OF))
CPR_s_error("OF cursor");
/* Allocate update block, flush old request block, then
find the right request block, and the target relation */
upd* update = (upd*) MSC_alloc(UPD_LEN);
update->upd_references = request->req_values;
MSC_free_request(request);
request = par_cursor(NULL);
if (request->req_flags == REQ_sql_blob_create)
PAR_error("expected a TABLE cursor, got a BLOB cursor");
if ((transaction || request->req_trans) &&
(!transaction || !request->req_trans ||
strcmp(transaction, request->req_trans)))
{
if (transaction)
PAR_error("different transaction for select and update");
else { // does not specify transaction clause in
// "update ... where cuurent of cursor" stmt
SSHORT trans_nm_len = strlen(request->req_trans);
SCHAR* str_2 = (SCHAR *) MSC_alloc(trans_nm_len + 1);
transaction = str_2;
const SCHAR* str_1 = request->req_trans;
do {
*str_2++ = *str_1++;
} while (--trans_nm_len);
}
}
request->req_trans = transaction;
relation = SQL_relation(request, r_name, db_name, owner_name, true);
// Given the target relation, find the input context for the modify
gpre_rse* select = request->req_rse;
SSHORT i;
for (i = 0; i < select->rse_count; i++) {
input_context = select->rse_context[i];
if (input_context->ctx_relation == relation)
break;
}
if (i == select->rse_count)
PAR_error("table not in request");
// Resolve input fields first
if (alias) {
alias->sym_type = SYM_context;
alias->sym_object = input_context;
HSH_insert(alias);
}
for (ptr = set_list->nod_arg; ptr < end_list; ptr++) {
GPRE_NOD set_item = *ptr;
SQE_resolve(set_item->nod_arg[0], request, 0);
pair(set_item->nod_arg[0], set_item->nod_arg[1]);
}
update->upd_request = request;
update->upd_source = input_context;
gpre_ctx* update_context = MSC_context(request);
update->upd_update = update_context;
update_context->ctx_relation = relation;
update->upd_assignments = set_list;
act* action = MSC_action(request, ACT_update);
// Resolve update fields next
if (alias)
alias->sym_object = update_context;
for (ptr = set_list->nod_arg; ptr < end_list; ptr++) {
GPRE_NOD set_item = *ptr;
SQE_resolve(set_item->nod_arg[1], request, 0);
REF field_ref = (REF) ((set_item->nod_arg[1])->nod_arg[0]);
slc* slice = NULL;
act* slice_action = (act*) field_ref->ref_slice;
if (slice_action &&
(slice = (slc*) slice_action->act_object))
{
// These gpreGlob.requests got lost in freeing the main request
gpre_req* slice_request = slice_action->act_request;
slice_request->req_next = gpreGlob.requests;
gpreGlob.requests = slice_request;
slice->slc_field_ref = field_ref;
slice->slc_array = (GPRE_NOD) set_item->nod_arg[0];
slice->slc_parent_request = request;
slice_action->act_type = ACT_put_slice;
/* If slice ref is not yet posted, post it.
This is required to receive the handle for the
array being updated */
bool found = false;
for (REF req_ref = request->req_references; req_ref;
req_ref = req_ref->ref_next)
{
if (req_ref == field_ref) {
set_item->nod_arg[1]->nod_arg[0] = (GPRE_NOD) req_ref;
found = true;
break;
}
if ((req_ref->ref_field == field_ref->ref_field) &&
(req_ref->ref_context == field_ref->ref_context))
{
PAR_error
("Can't update multiple slices of same column");
}
}
if (!found) {
field_ref->ref_next = request->req_references;
request->req_references = field_ref;
}
}
pair(set_item->nod_arg[0], set_item->nod_arg[1]);
}
action->act_whenever = gen_whenever();
action->act_object = (REF) update;
if (alias)
HSH_remove(alias);
return action;
}
request->req_trans = transaction;
// How amusing. After all that work, it wasn't a sub-action at all.
// Neat. Take the pieces and build a complete request. Start by
// figuring out what database is involved.
// Generate record select expression, then resolve input values
gpre_rse* select = (gpre_rse*) MSC_alloc(RSE_LEN(1));
request->req_rse = select;
select->rse_count = 1;
select->rse_context[0] = input_context;
if (!alias && !gpreGlob.token_global.tok_symbol)
// may have a relation name put parser didn't know it when it parsed it
gpreGlob.token_global.tok_symbol = HSH_lookup(gpreGlob.token_global.tok_string);
for (ptr = set_list->nod_arg; ptr < end_list; ptr++) {
GPRE_NOD set_item = *ptr;
SQE_resolve(set_item->nod_arg[0], request, select);
}
// Process boolean, if any
if (where)
select->rse_boolean = SQE_boolean(request, 0);
// Resolve update fields to update context
gpre_ctx* update_context = MSC_context(request);
request->req_update = update_context;
update_context->ctx_relation = relation;
if (alias)
alias->sym_object = update_context;
for (ptr = set_list->nod_arg; ptr < end_list; ptr++) {
GPRE_NOD set_item = *ptr;
SQE_resolve(set_item->nod_arg[1], request, 0);
REF field_ref = (REF) ((set_item->nod_arg[1])->nod_arg[0]);
act* slice_action = (act*) field_ref->ref_slice;
if (slice_action) {
// Slices not allowed in searched updates
PAR_error("Updates of slices not allowed in searched updates");
}
/* In dialect 1, neither the value being assigned (nod_arg[0])
nor the field to which it is being assigned (nod_arg[1]) may
be of a data type added in V6. */
if (SQL_DIALECT_V5 == gpreGlob.sw_sql_dialect) {
for (int arg_num = 0; arg_num <= 1; arg_num++)
if (nod_field == set_item->nod_arg[arg_num]->nod_type) {
const USHORT field_dtype = ((REF)
(set_item->nod_arg[arg_num]->
nod_arg[0]))->ref_field->fld_dtype;
if ((dtype_sql_date == field_dtype)
|| (dtype_sql_time == field_dtype)
|| (dtype_int64 == field_dtype))
{
SQL_dialect1_bad_type(field_dtype);
}
}
}
pair(set_item->nod_arg[0], set_item->nod_arg[1]);
}
GPRE_NOD modify = MSC_node(nod_modify, 1);
request->req_node = modify;
modify->nod_arg[0] = set_list;
act* action = MSC_action(request, ACT_loop);
action->act_whenever = gen_whenever();
if (alias)
HSH_remove(alias);
return action;
}
//____________________________________________________________
//
// Handle an SQL whenever statement. This is declaratory,
// rather than a significant action.
//
static act* act_whenever(void)
{
global_whenever_list = NULL; // global var
// Pick up condition
USHORT condition;
if (MSC_match(KW_SQLERROR))
condition = SWE_error;
else if (MSC_match(KW_SQLWARNING))
condition = SWE_warning;
else if (MSC_match(KW_NOT) && MSC_match(KW_FOUND))
condition = SWE_not_found;
else
CPR_s_error("WHENEVER condition");
// Pick up action
swe* label;
if (MSC_match(KW_CONTINUE))
label = NULL;
else if ((MSC_match(KW_GO) && MSC_match(KW_TO)) || MSC_match(KW_GOTO)) {
MSC_match(KW_COLON);
USHORT l = gpreGlob.token_global.tok_length;
label = (swe*) MSC_alloc(sizeof(swe) + l);
label->swe_condition = condition;
label->swe_length = l;
if (label->swe_length) {
TEXT* p = label->swe_label;
const TEXT* q = gpreGlob.token_global.tok_string;
do {
*p++ = *q++;
} while (--l);
}
PAR_get_token();
label->swe_condition = condition;
}
else
CPR_s_error("GO TO or CONTINUE");
// Set up condition vector
global_whenever[condition] = label;
act* action = (act*) MSC_alloc(ACT_LEN);
action->act_type = ACT_noop;
MSC_match(KW_SEMI_COLON);
return action;
}
//____________________________________________________________
//
// Make sure that a file path doesn't contain a
// Decnet node name.
//
static bool check_filename(const TEXT * name)
{
const USHORT l = strlen(name);
if (!l)
return true;
for (const TEXT* p = name; *p; p++)
{
if (p[0] == ':' && p[1] == ':')
return false;
}
// CVC: what's this crap? It's totally useless! Maybe a copy/paste?
//TEXT file_name[256];
//l = MIN(l, sizeof(file_name) - 1);
//strncpy(file_name, name, l);
//file_name[l] = '\0';
return true;
}
//____________________________________________________________
//
// Parse connect options
//
static void connect_opts(
TEXT ** user,
TEXT ** password,
TEXT ** sql_role,
TEXT ** lc_messages,
USHORT * buffers)
{
for (;;) {
if (MSC_match(KW_CACHE)) {
*buffers = atoi(gpreGlob.token_global.tok_string);
PAR_get_token();
MSC_match(KW_BUFFERS);
}
else if (MSC_match(KW_USER))
*user = SQL_var_or_string(false);
else if (MSC_match(KW_PASSWORD))
*password = SQL_var_or_string(false);
else if (MSC_match(KW_ROLE)) {
if (gpreGlob.token_global.tok_type == tok_ident) {
// reserve extra bytes for quotes and NULL
TEXT* s = (TEXT*) MSC_alloc(gpreGlob.token_global.tok_length + 3);
SQL_resolve_identifier("<Role Name>", s);
s[0] = '\"';
strcpy(s + 1, gpreGlob.token_global.tok_string);
strcat(s, "\"");
*sql_role = s;
}
else
*sql_role = SQL_var_or_string(false);
}
else if (MSC_match(KW_LC_MESSAGES))
*lc_messages = SQL_var_or_string(false);
else
break;
}
}
#ifdef FLINT_CACHE
//____________________________________________________________
//
// Add a shared cache to an existing database.
//
static FIL define_cache(void)
{
FIL file = (FIL) MSC_alloc(sizeof(fil));
if (isQuoted(gpreGlob.token_global.tok_type)) {
TEXT* string = (TEXT*) MSC_alloc(gpreGlob.token_global.tok_length + 1);
file->fil_name = string;
MSC_copy(gpreGlob.token_global.tok_string, gpreGlob.token_global.tok_length, string);
PAR_get_token();
}
else
CPR_s_error("<quoted filename>");
if (!check_filename(file->fil_name))
PAR_error("node name not permitted"); // a node name is not permitted in a shared cache file name
if (MSC_match(KW_LENGTH)) {
file->fil_length = EXP_ULONG_ordinal(true);
if (file->fil_length < MIN_CACHE_BUFFERS) {
TEXT err_string[256];
sprintf(err_string, "Minimum of %d cache pages required",
MIN_CACHE_BUFFERS);
PAR_error(err_string);
}
MSC_match(KW_PAGES);
}
else
file->fil_length = DEF_CACHE_BUFFERS; // default cache buffers
return file;
}
#endif
//____________________________________________________________
//
// Add a new file to an existing database.
//
static FIL define_file(void)
{
FIL file = (FIL) MSC_alloc(sizeof(fil));
if (isQuoted(gpreGlob.token_global.tok_type)) {
TEXT* string = (TEXT*) MSC_alloc(gpreGlob.token_global.tok_length + 1);
file->fil_name = string;
MSC_copy(gpreGlob.token_global.tok_string, gpreGlob.token_global.tok_length, string);
gpreGlob.token_global.tok_length += 2;
PAR_get_token();
}
else
CPR_s_error("<quoted filename>");
if (!check_filename(file->fil_name))
PAR_error("node name not permitted"); // A node name is not permitted in a shadow or secondary file name
while (true) {
if (MSC_match(KW_LENGTH)) {
MSC_match(KW_EQUALS);
file->fil_length = EXP_ULONG_ordinal(true);
MSC_match(KW_PAGES);
MSC_match(KW_PAGE);
}
else if (MSC_match(KW_STARTS) || MSC_match(KW_STARTING)) {
MSC_match(KW_AT);
MSC_match(KW_PAGE);
file->fil_start = EXP_ULONG_ordinal(true);
}
else
break;
}
return file;
}
//____________________________________________________________
//
// define a log file
//
static FIL define_log_file(bool log_serial)
{
FIL file = (FIL) MSC_alloc(sizeof(fil));
if (isQuoted(gpreGlob.token_global.tok_type)) {
TEXT* string = (TEXT*) MSC_alloc(gpreGlob.token_global.tok_length + 1);
file->fil_name = string;
MSC_copy(gpreGlob.token_global.tok_string, gpreGlob.token_global.tok_length, string);
PAR_get_token();
}
else
CPR_s_error("<quoted filename>");
if (!check_filename(file->fil_name))
PAR_error("node name not permitted"); // A node name is not permitted in a shadow or secondary file name
while (true) {
if (MSC_match(KW_SIZE)) {
MSC_match(KW_EQUALS);
file->fil_length = EXP_ULONG_ordinal(true);
}
else
break;
}
return file;
}
static dbb* dup_dbb(const dbb* db)
{
// ****************************************
//
// d u p _ d b b
//
// ****************************************
//
// dirty duplication of a dbb.
// just memcpy as no memory
// is freed in gpre.
//
// *************************************
if (!db)
return NULL;
dbb* newdb = (dbb*) MSC_alloc(DBB_LEN);
// CVC: the casts here should be tested and removed.
memcpy((SCHAR*) newdb, (const SCHAR*) db, DBB_LEN);
return newdb;
}
//____________________________________________________________
//
// Report an error with parameter
//
static void error(const TEXT * format, const TEXT * string2)
{
TEXT buffer[256];
sprintf(buffer, format, string2);
PAR_error(buffer);
}
//____________________________________________________________
//
// Extract string from "string" in
// token.
//
static TEXT* extract_string(bool advance_token)
{
switch (gpreGlob.sw_sql_dialect) {
case 1:
if (!isQuoted(gpreGlob.token_global.tok_type))
CPR_s_error("<string>");
break;
default:
if (gpreGlob.token_global.tok_type != tok_sglquoted)
CPR_s_error("<string>");
break;
}
TEXT* string = (TEXT*) MSC_alloc(gpreGlob.token_global.tok_length + 1);
MSC_copy(gpreGlob.token_global.tok_string, gpreGlob.token_global.tok_length, string);
if (advance_token)
PAR_get_token();
return string;
}
//____________________________________________________________
//
// Generate a linked list of SQL WHENEVER items for error
// handling.
//
static swe* gen_whenever(void)
{
if (global_whenever_list)
return global_whenever_list;
global_whenever_list = NULL; // redundant
swe* label = NULL;
for (int i = 0; i < SWE_max; i++)
{
const swe* proto = global_whenever[i];
if (proto) {
swe* prior = label;
USHORT l = proto->swe_length;
label = (swe*) MSC_alloc(sizeof(swe) + l);
label->swe_next = prior;
label->swe_condition = proto->swe_condition;
if (l) {
TEXT* p = label->swe_label;
const TEXT* q = proto->swe_label;
do {
*p++ = *q++;
} while (--l);
}
}
}
return label;
}
//____________________________________________________________
//
// Correlate the into list with the select expression list
// to form full references (post same against request).
//
static void into( gpre_req* request, GPRE_NOD field_list, GPRE_NOD var_list)
{
if (!var_list)
PAR_error("INTO list is required");
if (!field_list || field_list->nod_count != var_list->nod_count)
PAR_error
("column count and number of INTO list host-variables unequal");
GPRE_NOD* var_ptr = var_list->nod_arg;
GPRE_NOD* fld_ptr = field_list->nod_arg;
for (GPRE_NOD* end = fld_ptr + var_list->nod_count; fld_ptr < end;
fld_ptr++, var_ptr++)
{
REF var_ref = (REF) *var_ptr;
REF field_ref = NULL;
gpre_req* slice_req = NULL;
if (((*fld_ptr)->nod_type == nod_field)
|| ((*fld_ptr)->nod_type == nod_array))
{
field_ref = (REF) (*fld_ptr)->nod_arg[0];
slice_req = (gpre_req*) (*fld_ptr)->nod_arg[2];
}
REF reference = NULL;
gpre_fld* field;
if (field_ref && slice_req && (field = field_ref->ref_field)
&& field->fld_array)
{
EXP_post_array(field_ref);
// If field ref not posted yet, post it
bool found = false;
for (reference = request->req_references; reference;
reference = reference->ref_next)
{
if (reference == field_ref) {
found = true;
break;
}
}
if (!found) {
field_ref->ref_next = request->req_references;
request->req_references = field_ref;
}
reference = field_ref;
}
else
reference = SQE_post_reference(request, 0, 0, *fld_ptr);
var_ref->ref_friend = reference;
reference->ref_null_value = var_ref->ref_null_value;
}
}
//____________________________________________________________
//
// Create field in a relation for a metadata request.
//
static gpre_fld* make_field( gpre_rel* relation)
{
char s[ERROR_LENGTH];
SQL_resolve_identifier("<column name>", s);
gpre_fld* field = MET_make_field(s, 0, 0, true);
field->fld_relation = relation;
field->fld_flags |= FLD_meta;
PAR_get_token();
return field;
}
//____________________________________________________________
//
// Create index for metadata request.
//
static IND make_index( gpre_req* request, TEXT * string)
{
IND index = NULL;
TEXT s[ERROR_LENGTH];
if ((gpreGlob.isc_databases) && (!(gpreGlob.isc_databases->dbb_next))) {
strcpy(s, string);
index = MET_make_index(s);
if (request)
request->req_database = gpreGlob.isc_databases;
index->ind_flags |= IND_meta;
}
else
PAR_error("Can only reference INDEX in context of single database");
return index;
}
//____________________________________________________________
//
// Create relation for a metadata request.
//
static gpre_rel* make_relation( gpre_req* request, const TEXT * relation_name)
{
gpre_rel* relation = NULL;
TEXT r[ERROR_LENGTH];
if (gpreGlob.isc_databases && !gpreGlob.isc_databases->dbb_next) {
strcpy(r, relation_name);
relation = MET_make_relation(r);
relation->rel_database = gpreGlob.isc_databases;
relation->rel_meta = true;
if (request)
request->req_database = gpreGlob.isc_databases;
}
else
PAR_error("Can only reference TABLE in context of single database");
return relation;
}
//____________________________________________________________
//
// Given two value expressions associated in a relational
// expression, see if one is a field reference and the other
// is a host language variable.. If so, match the field to the
// host language variable.
// In other words, here we are guessing what the datatype is
// of a host language variable.
//
static void pair( GPRE_NOD expr, GPRE_NOD field_expr)
{
REF ref1, ref2;
if (field_expr->nod_type != nod_field)
return;
switch (expr->nod_type) {
case nod_value:
ref1 = (REF) field_expr->nod_arg[0];
ref2 = (REF) expr->nod_arg[0];
/* We're done if we've already determined the type of this reference
* (if, for instance, it's a parameter to a udf or PROCEDURE)
*/
if (ref2->ref_field)
return;
ref2->ref_field = ref1->ref_field;
if (ref1->ref_field->fld_array) {
ref2->ref_context = ref1->ref_context;
ref2->ref_friend = ref1;
EXP_post_array(ref1);
EXP_post_array(ref2);
}
return;
case nod_map_ref:
{
MEL element = (MEL) expr->nod_arg[0];
pair(element->mel_expr, field_expr);
}
return;
case nod_field:
case nod_literal:
return;
}
gpre_nod** ptr = expr->nod_arg;
const gpre_nod* const* const end_ptr = ptr + expr->nod_count;
for (; ptr < end_ptr; ptr++)
pair(*ptr, field_expr);
}
//____________________________________________________________
//
// Parse the multi-dimensional array specification.
//
static void par_array( gpre_fld* field)
{
SSHORT i = 0;
// Pick up ranges
ary* array_info = field->fld_array_info;
while (true) {
SLONG rangel = EXP_SSHORT_ordinal(true);
SLONG rangeh;
if (MSC_match(KW_COLON))
rangeh = EXP_SSHORT_ordinal(true);
else {
if (rangel < 1)
rangeh = 1;
else {
rangeh = rangel;
rangel = 1;
}
}
if (rangel >= rangeh)
PAR_error("Start of array range must be less than end of range");
if (i > MAX_ARRAY_DIMENSIONS)
PAR_error("Array has too many dimensions");
array_info->ary_rpt[i].ary_lower = rangel;
array_info->ary_rpt[i++].ary_upper = rangeh;
if (MSC_match(KW_R_BRCKET))
break;
if (!MSC_match(KW_COMMA))
CPR_s_error(", (comma)");
}
array_info->ary_dimension_count = i;
}
//____________________________________________________________
//
//
// Read in the specified character set on
// a READ BLOB or an INSERT BLOB.
//
static SSHORT par_char_set(void)
{
if (!MSC_match(KW_CHAR))
CPR_s_error("CHARACTER SET");
if (!MSC_match(KW_SET))
CPR_s_error("CHARACTER SET");
if (gpreGlob.token_global.tok_type != tok_ident)
CPR_s_error("<character set name>");
gpre_sym* symbol = MSC_find_symbol(gpreGlob.token_global.tok_symbol, SYM_charset);
if (!symbol)
PAR_error("The named CHARACTER SET was not found");
PAR_get_token();
return (((INTLSYM) symbol->sym_object)->intlsym_charset_id);
}
//____________________________________________________________
//
// Create a computed field
//
static void par_computed( gpre_req* request, gpre_fld* field)
{
MSC_match(KW_BY);
// If field size has been specified, save it. Then NULL it
// till the new size is calculated from the specified expression.
// This will catch self references.
//
// The user specified values will be restored to override calculated
// values.
//
// Don't move this initialization below.
const gpre_fld save_fld = *field;
CMPF cmp = (CMPF) MSC_alloc(CMPF_LEN);
cmp->cmpf_text = CPR_start_text();
cmp->cmpf_boolean = SQE_value(request, false, NULL, NULL);
CPR_end_text(cmp->cmpf_text);
field->fld_computed = cmp;
field->fld_flags |= FLD_computed;
CME_get_dtype(field->fld_computed->cmpf_boolean, field);
// If there was user specified data type/size, restore it
if (save_fld.fld_dtype) {
field->fld_dtype = save_fld.fld_dtype;
field->fld_length = save_fld.fld_length;
field->fld_scale = save_fld.fld_scale;
field->fld_sub_type = save_fld.fld_sub_type;
field->fld_ttype = save_fld.fld_ttype;
field->fld_charset_id = save_fld.fld_charset_id;
field->fld_collate_id = save_fld.fld_collate_id;
field->fld_char_length = save_fld.fld_char_length;
}
}
//____________________________________________________________
//
// Parse the next token as a cursor name.
// If it is, return the request associated with the cursor. If
// not, produce an error and return NULL.
//
static gpre_req* par_cursor( gpre_sym** symbol_ptr)
{
// **
// par_cursor() is called to use a previously declared cursor.
// tok_symbol == NULL means one of the two things.
// a) The name does not belong to a cursor. OR
// b) get_token() function in gpre.c was not able to find the cursor
// in hash table.
//
// case a) is an error condition.
// case b) Could have resulted because the cursor name was upcased and
// inserted into hash table since it was not quoted and it is
// now being refered as it was declared.
//
// Hence, Try and lookup the cursor name after resolving it once more. If
// it still cannot be located, Its an error
//*
TEXT t_cur[128];
SQL_resolve_identifier("<cursor name>", t_cur);
gpre_sym* symbol = HSH_lookup(gpreGlob.token_global.tok_string);
gpreGlob.token_global.tok_symbol = symbol;
if (symbol && symbol->sym_type == SYM_keyword)
gpreGlob.token_global.tok_keyword = (KWWORDS) symbol->sym_keyword;
else
gpreGlob.token_global.tok_keyword = KW_none;
symbol = MSC_find_symbol(gpreGlob.token_global.tok_symbol, SYM_cursor);
if (!symbol)
symbol = MSC_find_symbol(gpreGlob.token_global.tok_symbol, SYM_delimited_cursor);
if (symbol) {
PAR_get_token();
if (symbol_ptr)
*symbol_ptr = symbol;
return (gpre_req*) symbol->sym_object;
}
else {
symbol = MSC_find_symbol(gpreGlob.token_global.tok_symbol, SYM_dyn_cursor);
if (symbol)
PAR_error("DSQL cursors require DSQL update & delete statements");
}
CPR_s_error("<cursor name>");
return NULL; // silence compiler
}
//____________________________________________________________
//
// If this is a dynamic curser, return dynamic statement block.
//
static DYN par_dynamic_cursor(void)
{
gpre_sym* symbol = NULL;
if (gpreGlob.token_global.tok_symbol == NULL) {
TEXT t_cur[128];
SQL_resolve_identifier("<cursor name>", t_cur);
gpreGlob.token_global.tok_symbol = symbol = HSH_lookup(gpreGlob.token_global.tok_string);
if (symbol && symbol->sym_type == SYM_keyword)
gpreGlob.token_global.tok_keyword = (KWWORDS) symbol->sym_keyword;
else
gpreGlob.token_global.tok_keyword = KW_none;
}
if (symbol = MSC_find_symbol(gpreGlob.token_global.tok_symbol, SYM_dyn_cursor)) {
PAR_get_token();
return (DYN) symbol->sym_object;
}
return NULL;
}
//____________________________________________________________
//
// Handle an SQL field definition in CREATE, DECLARE or
// ALTER TABLE statement.
//
static gpre_fld* par_field( gpre_req* request, gpre_rel* relation)
{
gpre_fld* field = make_field(relation);
SQL_par_field_dtype(request, field, false);
if (MSC_match(KW_COMPUTED)) {
if (field->fld_global)
PAR_error("Cannot use domains to override computed column size");
if (field->fld_array_info)
PAR_error("Computed columns cannot be arrays");
par_computed(request, field);
}
// Check if default value was specified
if (gpreGlob.token_global.tok_keyword == KW_DEFAULT) {
field->fld_default_source = CPR_start_text();
PAR_get_token();
if (MSC_match(KW_USER))
field->fld_default_value = MSC_node(nod_user_name, 0);
// ** Begin sql/date/time/timestamp *
else if (MSC_match(KW_CURRENT_DATE))
field->fld_default_value = MSC_node(nod_current_date, 0);
else if (MSC_match(KW_CURRENT_TIME))
field->fld_default_value = MSC_node(nod_current_time, 0);
else if (MSC_match(KW_CURRENT_TIMESTAMP))
field->fld_default_value = MSC_node(nod_current_timestamp, 0);
// ** End sql/date/time/timestamp *
else if (MSC_match(KW_NULL))
field->fld_default_value = MSC_node(nod_null, 0);
else {
if (MSC_match(KW_MINUS)) {
if (gpreGlob.token_global.tok_type != tok_number)
CPR_s_error("<number>");
GPRE_NOD literal_node = EXP_literal();
field->fld_default_value = MSC_unary(nod_negate, literal_node);
}
else if ((field->fld_default_value = EXP_literal()) == NULL)
CPR_s_error("<constant>");
}
CPR_end_text(field->fld_default_source);
}
// Check for any column level constraints
cnstrt** constraint_ref = &field->fld_constraints;
bool in_constraints = true;
while (in_constraints) {
switch (gpreGlob.token_global.tok_keyword) {
case KW_CONSTRAINT:
case KW_PRIMARY:
case KW_UNIQUE:
case KW_REFERENCES:
case KW_CHECK:
case KW_NOT:
*constraint_ref = par_field_constraint(request, field, relation);
constraint_ref = &(*constraint_ref)->cnstrt_next;
break;
default:
in_constraints = false;
break;
}
}
// if (MSC_match (KW_NOT))
// if (MSC_match (KW_NULL))
// {
// field->fld_flags |= FLD_not_null;
// if (MSC_match (KW_UNIQUE))
// {
// index = (IND) MSC_alloc (IND_LEN);
// index->ind_relation = relation;
// index->ind_fields = field;
// index->ind_flags |= IND_dup_flag | IND_meta;
// index->ind_flags &= ~IND_descend;
// field->fld_index = index;
// }
// }
// else
// CPR_s_error ("NULL");
SQL_par_field_collate(request, field);
SQL_adjust_field_dtype(field);
return field;
}
//____________________________________________________________
//
// Create a field level constraint as part of CREATE TABLE or
// ALTER TABLE statement. Constraint maybe table or column level.
//
static CNSTRT par_field_constraint( gpre_req* request, gpre_fld* for_field,
gpre_rel* relation)
{
STR field_name;
cnstrt* new_constraint = (cnstrt*) MSC_alloc(CNSTRT_LEN);
if (gpreGlob.token_global.tok_keyword == KW_CONSTRAINT) {
PAR_get_token();
new_constraint->cnstrt_name = (STR) MSC_alloc(NAME_SIZE + 1);
SQL_resolve_identifier("<constraint name>",
new_constraint->cnstrt_name->str_string);
if (gpreGlob.token_global.tok_length > NAME_SIZE)
PAR_error("Constraint name too long");
PAR_get_token();
}
const enum kwwords keyword = gpreGlob.token_global.tok_keyword;
switch (keyword) {
case KW_NOT:
PAR_get_token();
if (!MSC_match(KW_NULL))
CPR_s_error("NULL");
new_constraint->cnstrt_type = CNSTRT_NOT_NULL;
for_field->fld_flags |= FLD_not_null;
break;
case KW_PRIMARY:
case KW_UNIQUE:
case KW_REFERENCES:
PAR_get_token();
if (keyword == KW_PRIMARY) {
if (!MSC_match(KW_KEY))
CPR_s_error("KEY");
new_constraint->cnstrt_type = CNSTRT_PRIMARY_KEY;
}
else if (keyword == KW_REFERENCES) {
new_constraint->cnstrt_type = CNSTRT_FOREIGN_KEY;
}
else
new_constraint->cnstrt_type = CNSTRT_UNIQUE;
// Set field for PRIMARY KEY or FOREIGN KEY or UNIQUE constraint
field_name = (STR) MSC_alloc(NAME_SIZE + 1);
strcpy(field_name->str_string, for_field->fld_symbol->sym_string);
MSC_push((GPRE_NOD) field_name, &new_constraint->cnstrt_fields);
if (keyword == KW_REFERENCES) {
// Relation name for foreign key
new_constraint->cnstrt_referred_rel = (STR) MSC_alloc(NAME_SIZE + 1);
SQL_resolve_identifier("referred <table name>",
new_constraint->cnstrt_referred_rel->str_string);
if (gpreGlob.token_global.tok_length > NAME_SIZE)
PAR_error("Referred table name too long");
PAR_get_token();
if (MSC_match(KW_LEFT_PAREN)) {
// Field specified for referred relation
field_name = (STR) MSC_alloc(NAME_SIZE + 1);
SQL_resolve_identifier("<column name>", field_name->str_string);
MSC_push((GPRE_NOD) field_name, &new_constraint->cnstrt_referred_fields);
CPR_token();
EXP_match_paren();
}
if (gpreGlob.token_global.tok_keyword == KW_ON) {
par_fkey_extension(new_constraint);
PAR_get_token();
if (gpreGlob.token_global.tok_keyword == KW_ON) {
par_fkey_extension(new_constraint);
PAR_get_token();
}
}
}
break;
case KW_CHECK:
PAR_get_token();
new_constraint->cnstrt_type = CNSTRT_CHECK;
new_constraint->cnstrt_text = CPR_start_text();
new_constraint->cnstrt_boolean = SQE_boolean(request, 0);
CPR_end_text(new_constraint->cnstrt_text);
break;
default:
PAR_error("Invalid constraint type");
}
return new_constraint;
}
//____________________________________________________________
//
// Parse the INTO clause for a dynamic SQL statement.
// Nobody uses its returned value currently.
static bool par_into( DYN statement)
{
if (!MSC_match(KW_INTO))
return false;
MSC_match(KW_SQL);
// "SQL" keyword is optional for backward compatibility
if (!MSC_match(KW_DESCRIPTOR))
CPR_s_error("DESCRIPTOR");
statement->dyn_sqlda2 = PAR_native_value(false, false);
return true;
}
//____________________________________________________________
//
// Parse request options.
//
static void par_options(const TEXT** transaction)
{
*transaction = NULL;
if (!MSC_match(KW_TRANSACTION))
return;
*transaction = PAR_native_value(false, true);
}
//____________________________________________________________
//
// parse the page_size clause of a
// create database statement
//
static int par_page_size(void)
{
MSC_match(KW_EQUALS);
const int n1 = EXP_USHORT_ordinal(false);
int n2 = n1;
if (n1 <= 1024)
n2 = 1024;
else if (n1 <= 2048)
n2 = 2048;
else if (n1 <= 4096)
n2 = 4096;
else if (n1 <= 8192)
n2 = 8192;
else if (n1 <= 16384)
n2 = 16384;
else
CPR_s_error("<page size> in range 1024 to 8096");
PAR_get_token();
return n2;
}
//____________________________________________________________
//
// Parse the next thing as a relation.
//
static gpre_rel* par_relation( gpre_req* request)
{
SCHAR r_name[NAME_SIZE + 1], db_name[NAME_SIZE + 1],
owner_name[NAME_SIZE + 1];
SQL_relation_name(r_name, db_name, owner_name);
return make_relation(request, r_name);
}
//____________________________________________________________
//
// Parse a dynamic statement name returning a dynamic
// statement block.
//
static DYN par_statement(void)
{
DYN statement = (DYN) MSC_alloc(DYN_LEN);
statement->dyn_statement_name = PAR_symbol(SYM_dummy);
statement->dyn_database = gpreGlob.isc_databases;
return statement;
}
//____________________________________________________________
//
// Handle an extended foreign key definition as part of CREATE TABLE
// or ALTER TABLE statements.
//
static void par_fkey_extension(cnstrt* cnstrt_val)
{
//
// Extended foreign key definition could be as follows :
//
// [ON DELETE { NO ACTION | CASCADE | SET DEFAULT | SET NULL } ]
// [ON UPDATE { NO ACTION | CASCADE | SET DEFAULT | SET NULL } ]
//
fb_assert(gpreGlob.token_global.tok_keyword == KW_ON);
fb_assert(cnstrt_val != NULL);
PAR_get_token();
const enum kwwords keyword = gpreGlob.token_global.tok_keyword;
switch (keyword) {
case KW_DELETE:
// NOTE: action must be defined only once
if (cnstrt_val->cnstrt_fkey_def_type & REF_DELETE_ACTION)
CPR_s_error("UPDATE");
else
cnstrt_val->cnstrt_fkey_def_type |= REF_DELETE_ACTION;
break;
case KW_UPDATE:
// NOTE: action must be defined only once
if (cnstrt_val->cnstrt_fkey_def_type & REF_UPDATE_ACTION)
CPR_s_error("DELETE");
else
cnstrt_val->cnstrt_fkey_def_type |= REF_UPDATE_ACTION;
break;
default:
// unexpected keyword
CPR_s_error("UPDATE or DELETE");
break;
}
PAR_get_token();
switch (gpreGlob.token_global.tok_keyword) {
case KW_NO:
PAR_get_token();
if (gpreGlob.token_global.tok_keyword != KW_ACTION)
CPR_s_error("ACTION");
else if (keyword == KW_DELETE)
cnstrt_val->cnstrt_fkey_def_type |= REF_DEL_NONE;
else
cnstrt_val->cnstrt_fkey_def_type |= REF_UPD_NONE;
break;
case KW_CASCADE:
if (keyword == KW_DELETE)
cnstrt_val->cnstrt_fkey_def_type |= REF_DEL_CASCADE;
else
cnstrt_val->cnstrt_fkey_def_type |= REF_UPD_CASCADE;
break;
case KW_SET:
PAR_get_token();
switch (gpreGlob.token_global.tok_keyword) {
case KW_DEFAULT:
if (keyword == KW_DELETE)
cnstrt_val->cnstrt_fkey_def_type |= REF_DEL_SET_DEFAULT;
else
cnstrt_val->cnstrt_fkey_def_type |= REF_UPD_SET_DEFAULT;
break;
case KW_NULL:
if (keyword == KW_DELETE)
cnstrt_val->cnstrt_fkey_def_type |= REF_DEL_SET_NULL;
else
cnstrt_val->cnstrt_fkey_def_type |= REF_UPD_SET_NULL;
break;
default:
// unexpected keyword
CPR_s_error("NULL or DEFAULT");
break;
}
break;
default:
// unexpected keyword
CPR_s_error("NO ACTION or CASCADE or SET DEFAULT or SET NULL");
break;
}
}
//____________________________________________________________
//
// Handle a create constraint verb as part of CREATE TABLE or
// ALTER TABLE statement. Constraint maybe table or column level.
//
static CNSTRT par_table_constraint( gpre_req* request, gpre_rel* relation)
{
cnstrt* constraint = (cnstrt*) MSC_alloc(CNSTRT_LEN);
if (gpreGlob.token_global.tok_keyword == KW_CONSTRAINT) {
PAR_get_token();
constraint->cnstrt_name = (STR) MSC_alloc(NAME_SIZE + 1);
SQL_resolve_identifier("<constraint name>",
constraint->cnstrt_name->str_string);
if (gpreGlob.token_global.tok_length > NAME_SIZE)
PAR_error("Constraint name too long");
PAR_get_token();
}
gpre_lls** fields;
USHORT num_for_key_flds = 0, num_prim_key_flds = 0;
const enum kwwords keyword = gpreGlob.token_global.tok_keyword;
switch (keyword) {
case KW_PRIMARY:
case KW_UNIQUE:
case KW_FOREIGN:
PAR_get_token();
if (keyword == KW_PRIMARY) {
if (!MSC_match(KW_KEY))
CPR_s_error("KEY");
constraint->cnstrt_type = CNSTRT_PRIMARY_KEY;
}
else if (keyword == KW_FOREIGN) {
if (!MSC_match(KW_KEY))
CPR_s_error("KEY");
constraint->cnstrt_type = CNSTRT_FOREIGN_KEY;
}
else
constraint->cnstrt_type = CNSTRT_UNIQUE;
EXP_left_paren(0);
/* Get list of fields for PRIMARY KEY or FOREIGN KEY or UNIQUE
constraint */
fields = &constraint->cnstrt_fields;
do {
STR field_name = (STR) MSC_alloc(NAME_SIZE + 1);
SQL_resolve_identifier("<column name>", field_name->str_string);
MSC_push((GPRE_NOD) field_name, fields);
fields = &(*fields)->lls_next;
++num_for_key_flds;
CPR_token();
} while (MSC_match(KW_COMMA));
if (keyword != KW_FOREIGN)
num_for_key_flds = 0;
EXP_match_paren();
if (keyword == KW_FOREIGN) {
if (!MSC_match(KW_REFERENCES))
CPR_s_error("REFERENCES");
// Relation name for foreign key
constraint->cnstrt_referred_rel = (STR) MSC_alloc(NAME_SIZE + 1);
SQL_resolve_identifier("referred <table name>",
constraint->cnstrt_referred_rel->str_string);
if (gpreGlob.token_global.tok_length > NAME_SIZE)
PAR_error("Referred table name too long");
PAR_get_token();
constraint->cnstrt_referred_fields = NULL;
if (MSC_match(KW_LEFT_PAREN)) {
// Fields specified for referred relation
fields = &constraint->cnstrt_referred_fields;
do {
STR field_name = (STR) MSC_alloc(NAME_SIZE + 1);
SQL_resolve_identifier("<column name>",
field_name->str_string);
MSC_push((GPRE_NOD) field_name, fields);
fields = &(*fields)->lls_next;
++num_prim_key_flds;
CPR_token();
} while (MSC_match(KW_COMMA));
EXP_match_paren();
}
/* Don't print error message in case if <referenced column list>
is not specified. Try to catch them in cmd.c[create_constraint]
later on */
if (constraint->cnstrt_referred_fields != NULL &&
num_prim_key_flds != num_for_key_flds)
{
PAR_error
("FOREIGN KEY column count does not match PRIMARY KEY");
}
if (gpreGlob.token_global.tok_keyword == KW_ON) {
par_fkey_extension(constraint);
PAR_get_token();
if (gpreGlob.token_global.tok_keyword == KW_ON) {
par_fkey_extension(constraint);
PAR_get_token();
}
}
} // if KW_FOREIGN
break;
case KW_CHECK:
PAR_get_token();
constraint->cnstrt_type = CNSTRT_CHECK;
constraint->cnstrt_text = CPR_start_text();
constraint->cnstrt_boolean = SQE_boolean(request, 0);
CPR_end_text(constraint->cnstrt_text);
break;
default:
PAR_error("Invalid constraint type");
}
return constraint;
}
//____________________________________________________________
//
// Parse the isolation level part.
// If expect_iso is true, an isolation level is required.
// Returns true if found a match else false.
//
static bool par_transaction_modes(gpre_tra* trans,
bool expect_iso)
{
if (MSC_match(KW_READ)) {
if (MSC_match(KW_ONLY)) {
if (expect_iso)
CPR_s_error("SNAPSHOT");
trans->tra_flags |= TRA_ro;
return true;
}
else if (MSC_match(KW_WRITE)) {
if (expect_iso)
CPR_s_error("SNAPSHOT");
return true;
}
if (!(MSC_match(KW_COMMITTED) || MSC_match(KW_UNCOMMITTED)))
CPR_s_error("COMMITTED");
trans->tra_flags |= TRA_read_committed;
if (MSC_match(KW_NO)) {
if (MSC_match(KW_VERSION))
return true;
else if (MSC_match(KW_WAIT)) {
trans->tra_flags |= TRA_nw;
return true;
}
else
CPR_s_error("WAIT or VERSION");
}
if (MSC_match(KW_VERSION))
trans->tra_flags |= TRA_rec_version;
return true;
}
else if (MSC_match(KW_SNAPSHOT)) {
if (MSC_match(KW_TABLE)) {
trans->tra_flags |= TRA_con;
MSC_match(KW_STABILITY);
return true;
}
else
return true;
}
return false;
}
//____________________________________________________________
//
// Parse the USING clause for a dynamic SQL statement.
//
static bool par_using( DYN statement)
{
if (!MSC_match(KW_USING))
return false;
MSC_match(KW_SQL);
// keyword "SQL" is optional for backward compatibility
if (MSC_match(KW_DESCRIPTOR))
statement->dyn_sqlda = PAR_native_value(false, false);
else
statement->dyn_using = (GPRE_NOD) SQE_list(SQE_variable, NULL, false);
return true;
}
//____________________________________________________________
//
// Figure out the correct dtypes
//
static USHORT resolve_dtypes(KWWORDS typ,
bool sql_date)
{
TEXT err_mesg[128];
switch (typ) {
case KW_DATE:
if ((gpreGlob.sw_ods_version < 10) || (gpreGlob.sw_server_version < 6))
switch (gpreGlob.sw_sql_dialect) {
case 1:
return dtype_timestamp;
case 2:
sprintf(err_mesg,
"Encountered column type DATE which is ambiguous in dialect %d\n",
gpreGlob.sw_sql_dialect);
PAR_error(err_mesg);
return dtype_unknown; // TMN: FIX FIX
/* return; */
default:
sprintf(err_mesg,
"Encountered column type DATE which is not supported in ods version %d\n",
gpreGlob.sw_ods_version);
PAR_error(err_mesg);
}
else {
/** column definition SQL DATE is unambiguous in any dialect **/
if (sql_date)
return dtype_sql_date;
switch (gpreGlob.sw_sql_dialect) {
case 1:
return dtype_timestamp;
case 2:
sprintf(err_mesg,
"Encountered column type DATE which is ambiguous in dialect %d\n",
gpreGlob.sw_sql_dialect);
PAR_error(err_mesg);
return dtype_unknown; // TMN: FIX FIX
/* return; */
default:
return dtype_sql_date;
}
}
break;
case KW_TIME:
if ((gpreGlob.sw_ods_version < 10) || (gpreGlob.sw_server_version < 6)) {
sprintf(err_mesg,
"Encountered column type TIME which is not supported by pre 6.0 Servers\n");
PAR_error(err_mesg);
return dtype_unknown; // TMN: FIX FIX
/* return; */
}
else
return dtype_sql_time;
break;
case KW_TIMESTAMP:
return dtype_timestamp;
break;
default:
sprintf(err_mesg, "resolve_dtypes(): Unknown dtype %d\n", typ);
PAR_error(err_mesg);
break;
}
//
// TMN: FIX FIX Added "return dtype_unknown;" to silence compiler, but
// this is really a logic error we have to fix.
//
return dtype_unknown;
}
//____________________________________________________________
//
// Parse the tail of a CREATE DATABASE statement.
//
static bool tail_database(enum act_t action_type,
DBB database)
{
TEXT* string = NULL;
// parse options for the database parameter block
bool logdefined = false;
bool extend_dpb = false;
while (true) {
if (MSC_match(KW_LENGTH)) {
database->dbb_length = EXP_ULONG_ordinal(true);
MSC_match(KW_PAGES);
}
else if (MSC_match(KW_USER)) {
if (isQuoted(gpreGlob.token_global.tok_type)) {
database->dbb_c_user = string =
(TEXT*) MSC_alloc(gpreGlob.token_global.tok_length + 1);
MSC_copy(gpreGlob.token_global.tok_string, gpreGlob.token_global.tok_length, string);
string[gpreGlob.token_global.tok_length - 2] = '\0';
PAR_get_token();
}
else
/* Some non-C languages (such as Fortran) have problems
* with extending the static DPB to add the runtime options
* needed for a runtime user name or password.
* 11 April 1995
*/
if (gpreGlob.sw_language == lang_c) {
if (!MSC_match(KW_COLON))
CPR_s_error("<colon> or <quoted string>");
/** Should I bother about dialects here ?? **/
if (isQuoted(gpreGlob.token_global.tok_type))
CPR_s_error("<host variable>");
database->dbb_r_user = PAR_native_value(false, false);
extend_dpb = true;
}
else
CPR_s_error("<quoted string>");
}
else if (MSC_match(KW_PASSWORD)) {
if (isQuoted(gpreGlob.token_global.tok_type)) {
database->dbb_c_password = string =
(TEXT*) MSC_alloc(gpreGlob.token_global.tok_length + 1);
MSC_copy(gpreGlob.token_global.tok_string, gpreGlob.token_global.tok_length, string);
string[gpreGlob.token_global.tok_length] = '\0';
PAR_get_token();
}
else
/* Some non-C languages (such as Fortran) have problems
* with extending the static DPB to add the runtime options
* needed for a runtime user name or password.
* 11 April 1995
*/
if (gpreGlob.sw_language == lang_c) {
if (!MSC_match(KW_COLON))
CPR_s_error("<colon> or <quoted string>");
if (isQuoted(gpreGlob.token_global.tok_type))
CPR_s_error("<host variable>");
database->dbb_r_password = PAR_native_value(false, false);
extend_dpb = true;
}
else
CPR_s_error("<quoted string>");
}
else if (MSC_match(KW_DEFAULT)) {
if (!MSC_match(KW_CHAR) || !MSC_match(KW_SET))
CPR_s_error("CHARACTER SET");
database->dbb_def_charset = PAR_native_value(false, false);
}
else
break;
}
if (action_type == ACT_drop_database) {
if (MSC_match(KW_CASCADE))
database->dbb_flags |= DBB_cascade;
/* TMN: ERROR ERROR we cant return _nothing* from a function returning */
// a bool. I changed this to false to flag an error, but we have to
// look into this.
return false;
/* return; */
}
// parse add/drop items
while (true) {
MSC_match(KW_ADD);
if (MSC_match(KW_DROP)) {
if (MSC_match(KW_LOG_FILE))
; // Ignore DROP LOG database->dbb_flags |= DBB_drop_log;
else if (MSC_match(KW_CASCADE))
database->dbb_flags |= DBB_cascade;
#ifdef FLINT_CACHE
else if (MSC_match(KW_CACHE))
database->dbb_flags |= DBB_drop_cache;
else
PAR_error("only log files or shared cache can be dropped"); // msg 121 only SECURITY_CLASS, DESCRIPTION and CACHE can be dropped
#else
else
PAR_error("only log files can be dropped"); // msg 121 only SECURITY_CLASS, DESCRIPTION and CACHE can be dropped
#endif // FLINT_CACHE
// ****
// else if (MSC_match (KW_DESCRIP))
// database->dbb_flags |= DBB_null_description;
// else if (MSC_match (KW_SECURITY_CLASS))
// database->dbb_flags |= DBB_null_security_class;
//***
}
// ****
// else if (gpreGlob.token_global.tok_keyword == KW_DESCRIPTION)
// database->dbb_description = parse_description();
// else if (MSC_match (KW_SECURITY_CLASS))
// database->dbb_security_class = PARSE_symbol (tok_ident);
//***
else if (MSC_match(KW_FILE)) {
FIL file = define_file();
file->fil_next = database->dbb_files;
database->dbb_files = file;
}
else if (MSC_match(KW_PAGE_SIZE) || MSC_match(KW_PAGESIZE)) {
if (action_type == ACT_alter_database)
PAR_error("PAGE SIZE can not be modified");
database->dbb_pagesize = par_page_size();
}
else if (MSC_match(KW_CHECK_POINT_LEN)) {
MSC_match(KW_EQUALS);
EXP_ULONG_ordinal(true); // skip
}
else if (MSC_match(KW_NUM_LOG_BUFS)) {
MSC_match(KW_EQUALS);
EXP_USHORT_ordinal(true); // skip
}
else if (MSC_match(KW_LOG_BUF_SIZE)) {
MSC_match(KW_EQUALS);
EXP_USHORT_ordinal(true); // skip
}
else if (MSC_match(KW_GROUP_COMMIT_WAIT)) {
MSC_match(KW_EQUALS);
EXP_ULONG_ordinal(true); // skip
}
else if (MSC_match(KW_LOG_FILE)) {
if (logdefined)
PAR_error("log redefinition");
logdefined = true;
if (MSC_match(KW_LEFT_PAREN)) {
while (true) {
FIL logfile = define_log_file(false);
logfile->fil_next = database->dbb_logfiles;
database->dbb_logfiles = logfile;
if (!MSC_match(KW_COMMA)) {
EXP_match_paren();
break;
}
}
if (MSC_match(KW_OVERFLOW))
define_log_file(true); // skip
else
PAR_error
("Overflow log specification required for this configuration");
}
else if (MSC_match(KW_BASE_NAME)) {
database->dbb_flags |= DBB_log_serial;
database->dbb_logfiles = define_log_file(true);
}
}
#ifdef FLINT_CACHE
else if (MSC_match(KW_CACHE))
database->dbb_cache_file = define_cache();
#endif // FLINT_CACHE
else
break;
}
return extend_dpb;
}
//____________________________________________________________
//
// Upcase a string into another string.
//
static void to_upcase(const TEXT * p, TEXT * q)
{
UCHAR c;
USHORT l = 0;
while ((c = *p++) && (++l <= NAME_SIZE)) {
*q++ = UPPER(c);
}
*q = 0;
}
//____________________________________________________________
//
// To do: move these to the correct position in the file.
void SQL_resolve_identifier( const TEXT* err_mesg, TEXT* str)
{
switch (gpreGlob.sw_sql_dialect) {
case 2:
if (gpreGlob.token_global.tok_type == tok_dblquoted)
PAR_error("Ambiguous use of double quotes in dialect 2");
case 1:
if (gpreGlob.token_global.tok_type != tok_ident)
CPR_s_error(err_mesg);
else
to_upcase(gpreGlob.token_global.tok_string, str);
break;
case 3:
if (gpreGlob.token_global.tok_type == tok_dblquoted) {
if (gpreGlob.token_global.tok_string[0] == '\"')
strip_quotes(gpreGlob.token_global);
strcpy(str, gpreGlob.token_global.tok_string);
}
else if (gpreGlob.token_global.tok_type == tok_ident)
to_upcase(gpreGlob.token_global.tok_string, str);
else
CPR_s_error(err_mesg);
break;
}
strcpy(gpreGlob.token_global.tok_string, str);
}
void SQL_dialect1_bad_type(USHORT field_dtype)
{
char buffer[200];
const char* s = "unknown";
switch (field_dtype) {
case dtype_sql_date:
s = "SQL DATE";
break;
case dtype_sql_time:
s = "SQL TIME";
break;
case dtype_int64:
s = "64-bit numeric";
break;
}
sprintf(buffer,
"Client SQL dialect 1 does not support reference to the %s datatype",
s);
PAR_error(buffer);
}
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