mirror of
https://github.com/FirebirdSQL/firebird.git
synced 2025-01-24 10:43:03 +01:00
Code clean-up and re-apply comments as suggested by Claudio V.
This commit is contained in:
arnobrinkman
parent
db3249d1ea
commit
f5002b3f5b
@ -247,19 +247,11 @@ STR temp_collation_name = NULL;
|
||||
@param relation_node
|
||||
|
||||
**/
|
||||
DSQL_CTX PASS1_make_context( DSQL_REQ request, DSQL_NOD relation_node)
|
||||
DSQL_CTX PASS1_make_context(DSQL_REQ request, DSQL_NOD relation_node)
|
||||
{
|
||||
DSQL_CTX context, conflict;
|
||||
STR relation_name, string;
|
||||
DSQL_REL relation;
|
||||
DSQL_PRC procedure;
|
||||
DSQL_FLD field;
|
||||
DSQL_NOD *input;
|
||||
DLLS stack;
|
||||
TEXT *conflict_name;
|
||||
ISC_STATUS error_code;
|
||||
TSQL tdsql;
|
||||
USHORT count;
|
||||
|
||||
DEV_BLKCHK(request, dsql_type_req);
|
||||
DEV_BLKCHK(relation_node, dsql_type_nod);
|
||||
@ -272,6 +264,7 @@ DSQL_CTX PASS1_make_context( DSQL_REQ request, DSQL_NOD relation_node)
|
||||
/* figure out whether this is a relation or a procedure
|
||||
and give an error if it is neither */
|
||||
|
||||
STR relation_name;
|
||||
if (relation_node->nod_type == nod_rel_proc_name) {
|
||||
relation_name = (STR) relation_node->nod_arg[e_rpn_name];
|
||||
}
|
||||
@ -282,14 +275,15 @@ DSQL_CTX PASS1_make_context( DSQL_REQ request, DSQL_NOD relation_node)
|
||||
relation_name = (STR) relation_node->nod_arg[e_rln_name];
|
||||
}
|
||||
|
||||
/* CVC: Let's skim the context, too. */
|
||||
if (relation_name && relation_name->str_data)
|
||||
// CVC: Let's skim the context, too.
|
||||
if (relation_name && relation_name->str_data) {
|
||||
pass_exact_name ( (TEXT*) relation_name->str_data);
|
||||
}
|
||||
|
||||
DEV_BLKCHK(relation_name, dsql_type_str);
|
||||
|
||||
if (relation_node->nod_type == nod_derived_table) {
|
||||
//
|
||||
// No processing needed here for derived tables.
|
||||
}
|
||||
else if ((relation_node->nod_type == nod_rel_proc_name) &&
|
||||
relation_node->nod_arg[e_rpn_inputs])
|
||||
@ -351,20 +345,21 @@ DSQL_CTX PASS1_make_context( DSQL_REQ request, DSQL_NOD relation_node)
|
||||
gds_arg_string, linecol,
|
||||
0);
|
||||
}
|
||||
/* Set up context block */
|
||||
|
||||
context = FB_NEW(*tdsql->tsql_default) dsql_ctx;
|
||||
// Set up context block.
|
||||
DSQL_CTX context = FB_NEW(*tdsql->tsql_default) dsql_ctx;
|
||||
context->ctx_relation = relation;
|
||||
context->ctx_procedure = procedure;
|
||||
context->ctx_request = request;
|
||||
context->ctx_context = request->req_context_number++;
|
||||
context->ctx_scope_level = request->req_scope_level;
|
||||
// When we're in a outer-join part mark context for it.
|
||||
if (request->req_in_outer_join) {
|
||||
context->ctx_flags |= CTX_outer_join;
|
||||
}
|
||||
|
||||
/* find the context alias name, if it exists */
|
||||
|
||||
// find the context alias name, if it exists.
|
||||
STR string;
|
||||
if (relation_node->nod_type == nod_rel_proc_name) {
|
||||
string = (STR) relation_node->nod_arg[e_rpn_alias];
|
||||
}
|
||||
@ -379,34 +374,40 @@ DSQL_CTX PASS1_make_context( DSQL_REQ request, DSQL_NOD relation_node)
|
||||
DEV_BLKCHK(string, dsql_type_str);
|
||||
|
||||
if (string) {
|
||||
DLLS stack;
|
||||
TEXT *conflict_name;
|
||||
ISC_STATUS error_code;
|
||||
|
||||
context->ctx_alias = (TEXT *) string->str_data;
|
||||
|
||||
/* check to make sure the context is not already used at this same
|
||||
query level (if there are no subqueries, this checks that the
|
||||
alias is not used twice in the request) */
|
||||
|
||||
// check to make sure the context is not already used at this same
|
||||
// query level (if there are no subqueries, this checks that the
|
||||
// alias is not used twice in the request).
|
||||
for (stack = request->req_context; stack; stack = stack->lls_next) {
|
||||
conflict = (DSQL_CTX) stack->lls_object;
|
||||
if (conflict->ctx_scope_level != context->ctx_scope_level)
|
||||
DSQL_CTX conflict = (DSQL_CTX) stack->lls_object;
|
||||
|
||||
if (conflict->ctx_scope_level != context->ctx_scope_level) {
|
||||
continue;
|
||||
}
|
||||
|
||||
if (conflict->ctx_alias) {
|
||||
conflict_name = conflict->ctx_alias;
|
||||
error_code = gds_alias_conflict_err;
|
||||
/* alias %s conflicts with an alias in the same statement */
|
||||
// alias %s conflicts with an alias in the same statement.
|
||||
}
|
||||
else if (conflict->ctx_procedure) {
|
||||
conflict_name = conflict->ctx_procedure->prc_name;
|
||||
error_code = gds_procedure_conflict_error;
|
||||
/* alias %s conflicts with a procedure in the same statement */
|
||||
// alias %s conflicts with a procedure in the same statement.
|
||||
}
|
||||
else if (conflict->ctx_relation) {
|
||||
conflict_name = conflict->ctx_relation->rel_name;
|
||||
error_code = gds_relation_conflict_err;
|
||||
/* alias %s conflicts with a relation in the same statement */
|
||||
// alias %s conflicts with a relation in the same statement.
|
||||
}
|
||||
else
|
||||
else {
|
||||
continue;
|
||||
}
|
||||
|
||||
if (!strcmp(conflict_name, context->ctx_alias))
|
||||
ERRD_post(gds_sqlerr, gds_arg_number, (SLONG) - 204,
|
||||
@ -415,8 +416,9 @@ DSQL_CTX PASS1_make_context( DSQL_REQ request, DSQL_NOD relation_node)
|
||||
}
|
||||
}
|
||||
|
||||
if (procedure)
|
||||
{
|
||||
if (procedure) {
|
||||
USHORT count;
|
||||
|
||||
if (request->req_scope_level == 1) {
|
||||
request->req_flags |= REQ_no_batch;
|
||||
}
|
||||
@ -442,6 +444,8 @@ DSQL_CTX PASS1_make_context( DSQL_REQ request, DSQL_NOD relation_node)
|
||||
|
||||
if (count)
|
||||
{
|
||||
DSQL_FLD field;
|
||||
DSQL_NOD *input;
|
||||
// Initialize this stack variable, and make it look like a node
|
||||
std::auto_ptr<dsql_nod> desc_node(FB_NEW_RPT(*tdsql->tsql_default, 0) dsql_nod);
|
||||
|
||||
@ -466,8 +470,7 @@ DSQL_CTX PASS1_make_context( DSQL_REQ request, DSQL_NOD relation_node)
|
||||
LLS_PUSH(context, &request->req_context);
|
||||
|
||||
return context;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
@ -828,51 +831,6 @@ DSQL_NOD PASS1_node(DSQL_REQ request, DSQL_NOD input, USHORT proc_flag)
|
||||
|
||||
case nod_join:
|
||||
return pass1_join(request, input, proc_flag);
|
||||
/*
|
||||
// Make up join node and mark relations as "possibly NULL"
|
||||
// if they are in outer joins (req_in_outer_join).
|
||||
node = MAKE_node(input->nod_type, input->nod_count);
|
||||
// First process type, boolean.
|
||||
node->nod_arg[e_join_type] = PASS1_node(request, input->nod_arg[e_join_type], proc_flag);
|
||||
// Process relations.
|
||||
switch (node->nod_arg[e_join_type]->nod_type) {
|
||||
case nod_join_inner:
|
||||
node->nod_arg[e_join_left_rel] =
|
||||
PASS1_node(request, input->nod_arg[e_join_left_rel], proc_flag);
|
||||
node->nod_arg[e_join_rght_rel] =
|
||||
PASS1_node(request, input->nod_arg[e_join_rght_rel], proc_flag);
|
||||
break;
|
||||
case nod_join_left:
|
||||
node->nod_arg[e_join_left_rel] =
|
||||
PASS1_node(request, input->nod_arg[e_join_left_rel], proc_flag);
|
||||
request->req_in_outer_join++;
|
||||
node->nod_arg[e_join_rght_rel] =
|
||||
PASS1_node(request, input->nod_arg[e_join_rght_rel], proc_flag);
|
||||
request->req_in_outer_join--;
|
||||
break;
|
||||
case nod_join_right:
|
||||
request->req_in_outer_join++;
|
||||
node->nod_arg[e_join_left_rel] =
|
||||
PASS1_node(request, input->nod_arg[e_join_left_rel], proc_flag);
|
||||
request->req_in_outer_join--;
|
||||
node->nod_arg[e_join_rght_rel] =
|
||||
PASS1_node(request, input->nod_arg[e_join_rght_rel], proc_flag);
|
||||
break;
|
||||
case nod_join_full:
|
||||
request->req_in_outer_join++;
|
||||
node->nod_arg[e_join_left_rel] =
|
||||
PASS1_node(request, input->nod_arg[e_join_left_rel], proc_flag);
|
||||
node->nod_arg[e_join_rght_rel] =
|
||||
PASS1_node(request, input->nod_arg[e_join_rght_rel], proc_flag);
|
||||
request->req_in_outer_join--;
|
||||
break;
|
||||
default:
|
||||
ASSERT_FAIL; // join type expected.
|
||||
break;
|
||||
}
|
||||
node->nod_arg[e_join_boolean] = PASS1_node(request, input->nod_arg[e_join_boolean], proc_flag);
|
||||
return node;
|
||||
*/
|
||||
|
||||
default:
|
||||
break;
|
||||
@ -1761,7 +1719,7 @@ static BOOLEAN aggregate_found2(DSQL_REQ request, DSQL_NOD node, USHORT * curren
|
||||
ambiguity
|
||||
|
||||
@brief Check for ambiguity in a field
|
||||
reference. The list with contexts were the
|
||||
reference. The list with contexts where the
|
||||
field was found is checked and the necessary
|
||||
message is build from it.
|
||||
|
||||
@ -5339,16 +5297,9 @@ static void pass1_udf_args(DSQL_REQ request, DSQL_NOD input, UDF udf, USHORT arg
|
||||
**/
|
||||
static DSQL_NOD pass1_union( DSQL_REQ request, DSQL_NOD input, DSQL_NOD order_list)
|
||||
{
|
||||
DSQL_NOD map_node, *ptr, *end, items, union_node, *uptr, nod1;
|
||||
DSQL_NOD union_rse, union_items, order1, order2, sort, position, tmp_list;
|
||||
DSQL_CTX union_context;
|
||||
MAP map_;
|
||||
SSHORT count = 0;
|
||||
SLONG number;
|
||||
SSHORT i, j; /* for-loop counters */
|
||||
DSQL_NOD *uptr, *ptr, *end;
|
||||
SSHORT i, j; // for-loop counters.
|
||||
TSQL tdsql;
|
||||
DLLS base;
|
||||
DSC desc;
|
||||
|
||||
DEV_BLKCHK(request, dsql_type_req);
|
||||
DEV_BLKCHK(input, dsql_type_nod);
|
||||
@ -5356,14 +5307,13 @@ static DSQL_NOD pass1_union( DSQL_REQ request, DSQL_NOD input, DSQL_NOD order_li
|
||||
|
||||
tdsql = GET_THREAD_DATA;
|
||||
|
||||
/* set up the rse node for the union */
|
||||
|
||||
union_rse = MAKE_node(nod_rse, e_rse_count);
|
||||
union_rse->nod_arg[e_rse_streams] = union_node =
|
||||
// set up the rse node for the union.
|
||||
DSQL_NOD union_rse = MAKE_node(nod_rse, e_rse_count);
|
||||
DSQL_NOD union_node = union_rse->nod_arg[e_rse_streams] =
|
||||
MAKE_node(nod_union, input->nod_count);
|
||||
|
||||
/* process all the sub-rse's */
|
||||
|
||||
// process all the sub-rse's.
|
||||
DLLS base;
|
||||
uptr = union_node->nod_arg;
|
||||
base = request->req_context;
|
||||
for (ptr = input->nod_arg, end = ptr + input->nod_count; ptr < end;
|
||||
@ -5375,17 +5325,16 @@ static DSQL_NOD pass1_union( DSQL_REQ request, DSQL_NOD input, DSQL_NOD order_li
|
||||
}
|
||||
}
|
||||
|
||||
/* generate a context for the union itself */
|
||||
|
||||
union_context = FB_NEW(*tdsql->tsql_default) dsql_ctx;
|
||||
// generate a context for the union itself.
|
||||
DSQL_CTX union_context = FB_NEW(*tdsql->tsql_default) dsql_ctx;
|
||||
union_context->ctx_context = request->req_context_number++;
|
||||
|
||||
/* generate the list of fields to select */
|
||||
|
||||
items = union_node->nod_arg[0]->nod_arg[e_rse_items];
|
||||
// generate the list of fields to select.
|
||||
DSQL_NOD items = union_node->nod_arg[0]->nod_arg[e_rse_items];
|
||||
|
||||
// loop through the list nodes, checking to be sure that they have the
|
||||
// same number of items
|
||||
DSQL_NOD nod1;
|
||||
for (i = 1; i < union_node->nod_count; i++) {
|
||||
nod1 = union_node->nod_arg[i]->nod_arg[e_rse_items];
|
||||
if (items->nod_count != nod1->nod_count) {
|
||||
@ -5395,13 +5344,33 @@ static DSQL_NOD pass1_union( DSQL_REQ request, DSQL_NOD input, DSQL_NOD order_li
|
||||
}
|
||||
}
|
||||
|
||||
// Comment below is belongs to the old code (way a union was handled).
|
||||
|
||||
/* SQL II, section 9.3, pg 195 governs which data types
|
||||
* are considered equivilant for a UNION
|
||||
* The following restriction is in some ways more restrictive
|
||||
* (cannot UNION CHAR with VARCHAR for instance)
|
||||
* (or cannot union CHAR of different lengths)
|
||||
* and in someways less restrictive
|
||||
* (SCALE is not looked at)
|
||||
* Workaround: use a direct CAST() statement in the SQL
|
||||
* statement to force desired datatype.
|
||||
*/
|
||||
|
||||
// loop through the list nodes and cast whenever possible.
|
||||
tmp_list = MAKE_node(nod_list, union_node->nod_count);
|
||||
DSC desc;
|
||||
DSQL_NOD tmp_list = MAKE_node(nod_list, union_node->nod_count);
|
||||
for (j = 0; j < items->nod_count; j++) {
|
||||
for (i = 0; i < union_node->nod_count; i++) {
|
||||
nod1 = union_node->nod_arg[i]->nod_arg[e_rse_items];
|
||||
MAKE_desc(&nod1->nod_arg[j]->nod_desc, nod1->nod_arg[j]);
|
||||
tmp_list->nod_arg[i] = nod1->nod_arg[j];
|
||||
|
||||
// We look only at the items->nod_arg[] when creating the
|
||||
// output descriptors. Make sure that the sub-rses
|
||||
// descriptor flags are copied onto items->nod_arg[]->nod_desc.
|
||||
// Bug 65584.
|
||||
// -Sudesh 07/28/1999.
|
||||
if (nod1->nod_arg[j]->nod_desc.dsc_flags & DSC_nullable) {
|
||||
items->nod_arg[j]->nod_desc.dsc_flags |= DSC_nullable;
|
||||
}
|
||||
@ -5413,8 +5382,11 @@ static DSQL_NOD pass1_union( DSQL_REQ request, DSQL_NOD input, DSQL_NOD order_li
|
||||
}
|
||||
items = union_node->nod_arg[0]->nod_arg[e_rse_items];
|
||||
|
||||
union_items = MAKE_node(nod_list, items->nod_count);
|
||||
|
||||
// Create mappings for union.
|
||||
MAP map_;
|
||||
SSHORT count = 0;
|
||||
DSQL_NOD map_node;
|
||||
DSQL_NOD union_items = MAKE_node(nod_list, items->nod_count);
|
||||
uptr = items->nod_arg;
|
||||
for (ptr = union_items->nod_arg, end = ptr + union_items->nod_count;
|
||||
ptr < end; ptr++) {
|
||||
@ -5423,26 +5395,24 @@ static DSQL_NOD pass1_union( DSQL_REQ request, DSQL_NOD input, DSQL_NOD order_li
|
||||
map_ = FB_NEW(*tdsql->tsql_default) map;
|
||||
map_node->nod_arg[e_map_map] = (DSQL_NOD) map_;
|
||||
|
||||
/* set up the MAP between the sub-rses and the union context */
|
||||
|
||||
// set up the MAP between the sub-rses and the union context.
|
||||
map_->map_position = count++;
|
||||
map_->map_node = *uptr++;
|
||||
map_->map_next = union_context->ctx_map;
|
||||
union_context->ctx_map = map_;
|
||||
}
|
||||
|
||||
union_rse->nod_arg[e_rse_items] = union_items;
|
||||
|
||||
/* Process ORDER clause, if any */
|
||||
|
||||
// Process ORDER clause, if any.
|
||||
if (order_list) {
|
||||
sort = MAKE_node(nod_list, order_list->nod_count);
|
||||
SLONG number;
|
||||
DSQL_NOD position, order1, order2;
|
||||
DSQL_NOD sort = MAKE_node(nod_list, order_list->nod_count);
|
||||
uptr = sort->nod_arg;
|
||||
for (ptr = order_list->nod_arg, end = ptr + order_list->nod_count;
|
||||
ptr < end; ptr++, uptr++) {
|
||||
|
||||
order1 = *ptr;
|
||||
|
||||
STR collate = 0;
|
||||
position = order1->nod_arg[e_order_field];
|
||||
|
||||
@ -5451,18 +5421,19 @@ static DSQL_NOD pass1_union( DSQL_REQ request, DSQL_NOD input, DSQL_NOD order_li
|
||||
position = position->nod_arg[e_coll_source];
|
||||
}
|
||||
|
||||
if (position->nod_type != nod_constant || position->nod_desc.dsc_dtype != dtype_long)
|
||||
if (position->nod_type != nod_constant || position->nod_desc.dsc_dtype != dtype_long) {
|
||||
ERRD_post(gds_sqlerr, gds_arg_number, (SLONG) - 104,
|
||||
gds_arg_gds, gds_dsql_command_err, gds_arg_gds, gds_order_by_err, /* invalid ORDER BY clause */
|
||||
gds_arg_gds, gds_dsql_command_err, gds_arg_gds, gds_order_by_err, // invalid ORDER BY clause.
|
||||
0);
|
||||
}
|
||||
number = (SLONG) position->nod_arg[0];
|
||||
if (number < 1 || number > union_items->nod_count)
|
||||
if (number < 1 || number > union_items->nod_count) {
|
||||
ERRD_post(gds_sqlerr, gds_arg_number, (SLONG) - 104,
|
||||
gds_arg_gds, gds_dsql_command_err, gds_arg_gds, gds_order_by_err, /* invalid ORDER BY clause */
|
||||
gds_arg_gds, gds_dsql_command_err, gds_arg_gds, gds_order_by_err, // invalid ORDER BY clause.
|
||||
0);
|
||||
}
|
||||
|
||||
/* make a new order node pointing at the Nth item in the select list */
|
||||
|
||||
// make a new order node pointing at the Nth item in the select list.
|
||||
*uptr = order2 = MAKE_node(nod_order, e_order_count);
|
||||
order2->nod_arg[e_order_field] = union_items->nod_arg[number - 1];
|
||||
order2->nod_arg[e_order_flag] = order1->nod_arg[e_order_flag];
|
||||
@ -5475,10 +5446,10 @@ static DSQL_NOD pass1_union( DSQL_REQ request, DSQL_NOD input, DSQL_NOD order_li
|
||||
union_rse->nod_arg[e_rse_sort] = sort;
|
||||
}
|
||||
|
||||
/* PROJECT on all the select items unless UNION ALL was specified */
|
||||
|
||||
if (!(input->nod_flags & NOD_UNION_ALL))
|
||||
// PROJECT on all the select items unless UNION ALL was specified.
|
||||
if (!(input->nod_flags & NOD_UNION_ALL)) {
|
||||
union_rse->nod_arg[e_rse_reduced] = union_items;
|
||||
}
|
||||
|
||||
return union_rse;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user