firebird/firebird-mirror
firebird/firebird-mirror
8
0
Fork 1
mirror of https://github.com/FirebirdSQL/firebird.git synced 2025-01-22 19:23:02 +01:00
Code Issues

Improved batch example and interfaces documentation

Browse Source
This commit is contained in:
AlexPeshkoff 2018-12-10 17:42:22 +03:00
parent bfa58e6f72
commit a676d61b72
2 changed files with 109 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

110
doc/Using_OO_API.html
View File

@ -3,10 +3,10 @@
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<title></title>
<meta name="generator" content="LibreOffice 5.4.5.1 (Linux)"/>
<meta name="generator" content="LibreOffice 6.0.6.2 (Linux)"/>
<meta name="author" content="alex "/>
<meta name="created" content="2013-05-31T00:00:00.010003100"/>
<meta name="changed" content="2018-05-10T18:16:59.126724786"/>
<meta name="changed" content="2018-12-10T17:39:15.976002774"/>
<meta name="created" content="00:00:00">
<meta name="created" content="00:00:00">
<meta name="created" content="00:00:00">
@ -1099,7 +1099,7 @@ alignment = batch-&gt;getBlobAlignment(&amp;status);</i></font></p>
<p style="font-variant: normal; font-style: normal"><font size="4" style="font-size: 14pt">It’s
supposed that all components of blob stream in a batch should be
aligned at least at alignment boundary, including size of stream
potions passed to addBlobStream() which should be a multiple of this
portions passed to addBlobStream() which should be a multiple of this
alignment. Header contains 3 fields – 8-byte blob ID (must be
non-zero), 4-byte total blob size and 4 byte BPB size. Total blob
size includes BPB inside, i.e. one will always find next blob in the
@ -1145,6 +1145,17 @@ correct (from batch POV) ID to msg-&gt;desc.</font></p>
<font size="4" style="font-size: 14pt">Almost all mentioned methods
are used in 11.batch.cpp – please use it to see an alive sample of
batching in firebird.</font></p>
<p style="margin-bottom: 0cm; font-variant: normal; font-style: normal">
<br/>
</p>
<p style="margin-bottom: 0cm; font-variant: normal; font-style: normal">
<font size="4" style="font-size: 14pt">Two words about access to
batches from ISC API - one can execute prepared ISC statement in
batch mode. Main support for it is present in Util interface, namely
getTransactionByHandle &amp; getStatementByHandle methods, which make
it possible to access appropriate interfaces identical to existing
ISC handles. An example of it is present in 12.batch_isc.cpp.</font></p>
<p style="margin-bottom: 0cm"><br/>
</p>
@ -2144,14 +2155,36 @@ sub-entries) in firebird configuration file:</font></p>
<p style="margin-bottom: 0cm"><br/>
</p>
<p style="margin-bottom: 0cm"><br/>
</p>
<p style="margin-bottom: 0cm"><a name="Dtc"></a><font size="4" style="font-size: 14pt">Dtc
interface – distributed transactions coordinator. Used to start
distributed (working with 2 or more attachments) transaction. Unlike
pre-FB3 approach where distributed transaction must be started in
this way from the most beginning FB3's distributed transactions
<p style="margin-bottom: 0cm"><a name="DecFloat16"></a><a name="DecFloat34"></a>
<font size="4" style="font-size: 14pt">DecFloat16 / DecFloat34 –
interfaces that help to work with DECFLOAT (16 &amp; 34 respectively)
datatypes. They have almost same set of methods with FB_DEC16
parameter replaced by FB_DEC34 for DecFloat34:</font></p>
<ol>
<li/>
<p style="margin-bottom: 0cm"><font size="4" style="font-size: 14pt">void
toBcd(const FB_DEC16* from, int* sign, unsigned char* bcd, int* exp)
– convert decimal float value to BCD.</font></p>
<li/>
<p style="margin-bottom: 0cm"><font size="4" style="font-size: 14pt">void
toString(StatusType* status, const FB_DEC16* from, unsigned
bufferLength, char* buffer) – convert decimal float value to
string.</font></p>
<li/>
<p style="margin-bottom: 0cm"><font size="4" style="font-size: 14pt">void
fromBcd(int sign, const unsigned char* bcd, int exp, FB_DEC16* to) –
make decimal float value from BCD.</font></p>
<li/>
<p style="margin-bottom: 0cm"><font size="4" style="font-size: 14pt">void
fromString(StatusType* status, const char* from, FB_DEC16* to) –
make decimal float value from string.</font></p>
<p style="margin-bottom: 0cm"></p>
</ol>
<p style="margin-bottom: 0cm"><a name="Dtc"></a><font size="4" style="font-size: 14pt"><font color="#000000">Dtc
</font>interface – distributed transactions coordinator. Used to
start distributed (working with 2 or more attachments) transaction.
Unlike pre-FB3 approach where distributed transaction must be started
in this way from the most beginning FB3's distributed transactions
coordinator makes it also possible to join already started
transactions into single distributed transaction.</font></p>
<ol>
@ -3107,18 +3140,60 @@ interface – various helper methods required here or there.</font></p>
getClientVersion() – returns integer, containing major version in
byte 0 and minor version in byte 1.</font></p>
<li/>
<p style="margin-bottom: 0cm"><font size="4" style="font-size: 14pt">IXpbBuilder*
<p style="margin-bottom: 0cm"><font color="#000000"><font size="4" style="font-size: 14pt">IXpbBuilder*
getXpbBuilder(StatusType* status, unsigned kind, const unsigned
char* buf, unsigned len) – returns <a href="#XpbBuilder">XpbBuilder</a>
interface. Valid <a href="#Valid builder types">kinds</a> are
enumerated in <a href="#XpbBuilder">XpbBuilder</a>.</font></p>
enumerated in <a href="#XpbBuilder">XpbBuilder</a>.</font></font></p>
<li/>
<p style="margin-bottom: 0cm"><font size="4" style="font-size: 14pt">unsigned
<p style="margin-bottom: 0cm"><font color="#000000"><font size="4" style="font-size: 14pt">unsigned
setOffsets(StatusType* status, IMessageMetadata* metadata,
IOffsetsCallback* callback) – sets valid offsets in
<a href="#MessageMetadata">MessageMetadata</a>. Performs calls to
callback in <a href="#OffsetsCallback">OffsetsCallback</a> for each
field/parameter.</font></p>
field/parameter.</font></font></p>
<li/>
<p style="margin-bottom: 0cm"><font size="4" style="font-size: 14pt">IDecFloat16*
getDecFloat16(StatusType* status) – access <a href="#DecFloat16">DecFloat16</a>
interface.</font></p>
<li/>
<p style="margin-bottom: 0cm"><font size="4" style="font-size: 14pt">IDecFloat34*
getDecFloat34(StatusType* status) – access <a href="#DecFloat34">DecFloat34</a>
interface.</font></p>
<li/>
<p style="margin-bottom: 0cm"><font size="4" style="font-size: 14pt">ITransaction*
getTransactionByHandle(StatusType* status, isc_tr_handle* hndlPtr) –
access <a href="#Transaction">Transaction</a> interface by ISC API
hndl.</font></p>
<li/>
<p style="margin-bottom: 0cm"><font size="4" style="font-size: 14pt">IStatement*
getStatementByHandle(StatusType* status, isc_stmt_handle* hndlPtr) –
access <a href="#Statement">Statement</a> interface by ISC API hndl.</font></p>
<li/>
<p style="margin-bottom: 0cm"><font size="4" style="font-size: 14pt">void
decodeTimeTz(StatusType* status, const ISC_TIME_TZ* timeTz,
unsigned* hours, unsigned* minutes, unsigned* seconds, unsigned*</font></p>
<p style="margin-bottom: 0cm"><font size="4" style="font-size: 14pt">fractions,
unsigned timeZoneBufferLength, char* <span style="text-decoration: none">timeZoneBuffer</span>)
– decode time taking time zone into an account.</font></p>
<li/>
<p style="margin-bottom: 0cm"><font size="4" style="font-size: 14pt">void
decodeTimeStampTz(StatusType* status, const ISC_TIMESTAMP_TZ*
timeStampTz, unsigned* year, unsigned* month, unsigned* day,
unsigned* hours, unsigned* minutes, unsigned* seconds, unsigned*
fractions, unsigned timeZoneBufferLength, char* timeZoneBuffer) -
decode timestamp taking time zone into an account.</font></p>
<li/>
<p style="margin-bottom: 0cm"><font size="4" style="font-size: 14pt">void
encodeTimeTz(StatusType* status, ISC_TIME_TZ* timeTz, unsigned
hours, unsigned minutes, unsigned seconds, unsigned fractions, const
char* timeZone) – encode time taking time zone into an account.</font></p>
<li/>
<p style="margin-bottom: 0cm"><font size="4" style="font-size: 14pt">void
encodeTimeStampTz(StatusType* status, ISC_TIMESTAMP_TZ* timeStampTz,
unsigned year, unsigned month, unsigned day, unsigned hours,
unsigned minutes, unsigned seconds, unsigned fractions, const char*
timeZone) – encode timestamp taking time zone into an account.</font></p>
</ol>
<p style="margin-bottom: 0cm"><br/>
@ -3756,9 +3831,8 @@ interface is main interface of database crypt key holder plugin.</font></p>
interface (if provided by user with <a href="#Provider">Provider</a>::setDbCryptCallback()
call). This call is always performed at database attach moment, and
some holders may reject attachment if satisfactory key was not
provided. </font><font size="4" style="font-size: 14pt">Return value
of 0 means that key holder can not provide a key to crypt plugin,
non-zero – can.</font></p>
provided. Return value of 0 means that key holder can not provide a
key to crypt plugin, non-zero – can.</font></p>
<li/>
<p style="margin-bottom: 0cm"><font size="4" style="font-size: 14pt">ICryptKeyCallback*
keyHandle(StatusType* status, const char* keyName) – is intended

18
examples/interfaces/11.batch.cpp
View File

@ -418,6 +418,22 @@ int main()
batch->addBlobStream(&status, stream - streamStart, streamStart);
// Continue last blob
stream = streamStart;
ISC_QUAD nullId = {0,0};
unsigned* size = putBlobHdr(stream, blobAlign, &nullId, 0, NULL);
const char* d4 = " 444444444444444444444444";
unsigned ld4 = strlen(d4);
memcpy(stream, d4, ld4);
*size += ld4;
stream += ld4;
stream = align(stream, blobAlign);
stream = align(stream, blobAlign);
batch->addBlobStream(&status, stream - streamStart, streamStart);
// Put segmented Blob in the stream
// add message
@ -435,7 +451,7 @@ int main()
// make stream
stream = streamStart;
unsigned* size = putBlobHdr(stream, blobAlign, &vSeg, pb->getBufferLength(&status), pb->getBuffer(&status));
size = putBlobHdr(stream, blobAlign, &vSeg, pb->getBufferLength(&status), pb->getBuffer(&status));
*size += putSegment(stream, d1);
*size += putSegment(stream, "\n");
*size += putSegment(stream, d2);