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-Support for mirroring tables in different Schema's
-Improved documentation for compiling with 7.1.x and 7.2.x
-Fixes a buffer overrun bug.

Steven Singer
This commit is contained in:
Bruce Momjian
2002-10-19 02:16:40 +00:00
parent cabad378fc
commit 8e6b5c8b27
4 changed files with 60 additions and 20 deletions
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29
contrib/dbmirror/pending.c
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@ -1,6 +1,6 @@
/****************************************************************************
* pending.c
* $Id: pending.c,v 1.5 2002/09/26 05:24:30 momjian Exp $
* $Id: pending.c,v 1.6 2002/10/19 02:16:40 momjian Exp $
*
* This file contains a trigger for Postgresql-7.x to record changes to tables
* to a pending table for mirroring.
@ -22,7 +22,7 @@
#include <executor/spi.h>
#include <commands/trigger.h>
#include <utils/lsyscache.h>
enum FieldUsage
{
PRIMARY = 0, NONPRIMARY, ALL, NUM_FIELDUSAGE
@ -46,7 +46,7 @@ char *packageData(HeapTuple tTupleData, TupleDesc tTupleDecs,
#define BUFFER_SIZE 256
#define MAX_OID_LEN 10
#define DEBUG_OUTPUT
extern Datum recordchange(PG_FUNCTION_ARGS);
@ -69,7 +69,8 @@ recordchange(PG_FUNCTION_ARGS)
HeapTuple retTuple = NULL;
char *tblname;
char op = 0;
char *schemaname;
char *fullyqualtblname;
if (fcinfo->context != NULL)
{
@ -81,6 +82,16 @@ recordchange(PG_FUNCTION_ARGS)
trigdata = (TriggerData *) fcinfo->context;
/* Extract the table name */
tblname = SPI_getrelname(trigdata->tg_relation);
#ifndef NOSCHEMAS
schemaname = get_namespace_name(RelationGetNamespace(trigdata->tg_relation));
fullyqualtblname = SPI_palloc(strlen(tblname) +
strlen(schemaname) + 4);
sprintf(fullyqualtblname,"\"%s\".\"%s\"",
schemaname,tblname);
#else
fullyqualtblname = SPI_palloc(strlen(tblname+3));
sprintf(fullyqualtblname,"\"%s\"",tblname);
#endif
tupdesc = trigdata->tg_relation->rd_att;
if (TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event))
{
@ -103,7 +114,7 @@ recordchange(PG_FUNCTION_ARGS)
op = 'd';
}
if (storePending(tblname, beforeTuple, afterTuple, tupdesc, trigdata, op))
if (storePending(fullyqualtblname, beforeTuple, afterTuple, tupdesc, trigdata, op))
{
/* An error occoured. Skip the operation. */
elog(ERROR, "Operation could not be mirrored");
@ -113,6 +124,7 @@ recordchange(PG_FUNCTION_ARGS)
#if defined DEBUG_OUTPUT
elog(NOTICE, "Returning on success");
#endif
SPI_pfree(fullyqualtblname);
SPI_finish();
return PointerGetDatum(retTuple);
}
@ -417,7 +429,7 @@ packageData(HeapTuple tTupleData, TupleDesc tTupleDesc,
#if defined DEBUG_OUTPUT
elog(NOTICE, cpFieldName);
#endif
while (iDataBlockSize - iUsedDataBlock < strlen(cpFieldName) + 4)
while (iDataBlockSize - iUsedDataBlock < strlen(cpFieldName) + 6)
{
cpDataBlock = SPI_repalloc(cpDataBlock, iDataBlockSize + BUFFER_SIZE);
iDataBlockSize = iDataBlockSize + BUFFER_SIZE;
@ -436,7 +448,7 @@ packageData(HeapTuple tTupleData, TupleDesc tTupleDesc,
}
else
{
*cpFormatedPtr = ' ';
sprintf(cpFormatedPtr," ");
iUsedDataBlock++;
cpFormatedPtr++;
continue;
@ -484,7 +496,8 @@ packageData(HeapTuple tTupleData, TupleDesc tTupleDesc,
if (tpPKeys != NULL)
SPI_pfree(tpPKeys);
#if defined DEBUG_OUTPUT
elog(NOTICE, "Returning");
elog(NOTICE, "Returning: DataBlockSize:%d iUsedDataBlock:%d",iDataBlockSize,
iUsedDataBlock);
#endif
memset(cpDataBlock + iUsedDataBlock, 0, iDataBlockSize - iUsedDataBlock);