mirror of
https://github.com/postgres/postgres.git
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Please apply this patch to contrib/dbmirror
In incorperates changes from myself and a number of contributors. This update to dbmirror provides: -replication of sequence operations via setval/nextval -DBMirror.pl support for logging to syslog -changed the names of the tables to dbmirror_* (no quotes required) -Support for writitng SQL statements to files instead of directly to a slave database -More options for DBMirror.pl in the config files. Steven Singer
This commit is contained in:
Bruce Momjian
@ -1,6 +1,7 @@
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/****************************************************************************
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* pending.c
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* $PostgreSQL: pgsql/contrib/dbmirror/pending.c,v 1.15 2003/11/29 22:39:19 pgsql Exp $
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* $Id: pending.c,v 1.16 2004/02/17 03:34:35 momjian Exp $
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* $PostgreSQL: pgsql/contrib/dbmirror/pending.c,v 1.16 2004/02/17 03:34:35 momjian Exp $
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*
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* This file contains a trigger for Postgresql-7.x to record changes to tables
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* to a pending table for mirroring.
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@ -34,35 +35,60 @@
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#include <executor/spi.h>
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#include <commands/trigger.h>
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#include <utils/lsyscache.h>
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#include <utils/array.h>
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enum FieldUsage
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{
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PRIMARY = 0, NONPRIMARY, ALL, NUM_FIELDUSAGE
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};
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int storePending(char *cpTableName, HeapTuple tBeforeTuple,
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HeapTuple tAfterTuple,
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TupleDesc tTupdesc,
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TriggerData *tpTrigdata, char cOp);
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HeapTuple tAfterTuple,
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TupleDesc tTupdesc,
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Oid tableOid,
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char cOp);
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int storeKeyInfo(char *cpTableName, HeapTuple tTupleData, TupleDesc tTuplDesc,
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TriggerData *tpTrigdata);
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int storeData(char *cpTableName, HeapTuple tTupleData, TupleDesc tTupleDesc,
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TriggerData *tpTrigData, int iIncludeKeyData);
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Oid tableOid);
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int storeData(char *cpTableName, HeapTuple tTupleData,
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TupleDesc tTupleDesc,Oid tableOid,int iIncludeKeyData);
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int2vector *getPrimaryKey(Oid tblOid);
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char *packageData(HeapTuple tTupleData, TupleDesc tTupleDecs,
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TriggerData *tTrigData,
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char *packageData(HeapTuple tTupleData, TupleDesc tTupleDecs, Oid tableOid,
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enum FieldUsage eKeyUsage);
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#define BUFFER_SIZE 256
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#define MAX_OID_LEN 10
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/*#define DEBUG_OUTPUT 1 */
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#define DEBUG_OUTPUT 1
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extern Datum recordchange(PG_FUNCTION_ARGS);
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PG_FUNCTION_INFO_V1(recordchange);
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#if defined DEBUG_OUTPUT
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#define debug_msg2(x,y) elog(NOTICE,x,y)
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#define debug_msg(x) elog(NOTICE,x)
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#define debug_msg3(x,y,z) elog(NOTICE,x,y,z)
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#else
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#define debug_msg2(x,y)
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#define debug_msg(x)
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#define debug_msg(x,y,z)
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#endif
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extern Datum nextval(PG_FUNCTION_ARGS);
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extern Datum setval(PG_FUNCTION_ARGS);
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int saveSequenceUpdate(const text * sequenceName,
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int nextSequenceValue);
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/*****************************************************************************
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* The entry point for the trigger function.
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* The Trigger takes a single SQL 'text' argument indicating the name of the
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@ -81,13 +107,15 @@ recordchange(PG_FUNCTION_ARGS)
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char op = 0;
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char *schemaname;
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char *fullyqualtblname;
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char *pkxpress=NULL;
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if (fcinfo->context != NULL)
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{
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if (SPI_connect() < 0)
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{
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elog(NOTICE, "storePending could not connect to SPI");
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ereport(ERROR,(errcode(ERRCODE_CONNECTION_FAILURE),
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errmsg("dbmirror:recordchange could not connect to SPI")));
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return -1;
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}
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trigdata = (TriggerData *) fcinfo->context;
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@ -124,8 +152,15 @@ recordchange(PG_FUNCTION_ARGS)
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beforeTuple = trigdata->tg_trigtuple;
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op = 'd';
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}
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else
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{
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ereport(ERROR,(errcode(ERRCODE_TRIGGERED_ACTION_EXCEPTION),
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errmsg("dbmirror:recordchange Unknown operation")));
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}
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if (storePending(fullyqualtblname, beforeTuple, afterTuple, tupdesc, trigdata, op))
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if (storePending(fullyqualtblname, beforeTuple, afterTuple,
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tupdesc, retTuple->t_tableOid, op))
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{
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/* An error occoured. Skip the operation. */
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ereport(ERROR,
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@ -135,10 +170,11 @@ recordchange(PG_FUNCTION_ARGS)
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return PointerGetDatum(NULL);
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}
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#if defined DEBUG_OUTPUT
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elog(NOTICE, "returning on success");
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#endif
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debug_msg("dbmirror:recordchange returning on success");
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SPI_pfree(fullyqualtblname);
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if(pkxpress != NULL)
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SPI_pfree(pkxpress);
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SPI_finish();
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return PointerGetDatum(retTuple);
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}
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@ -160,41 +196,45 @@ int
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storePending(char *cpTableName, HeapTuple tBeforeTuple,
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HeapTuple tAfterTuple,
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TupleDesc tTupDesc,
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TriggerData *tpTrigData, char cOp)
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Oid tableOid,
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char cOp)
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{
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char *cpQueryBase = "INSERT INTO \"Pending\" (\"TableName\",\"Op\",\"XID\") VALUES ($1,$2,$3)";
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char *cpQueryBase = "INSERT INTO dbmirror_pending (TableName,Op,XID) VALUES ($1,$2,$3)";
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int iResult = 0;
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HeapTuple tCurTuple;
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char nulls[3]=" ";
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/* Points the current tuple(before or after) */
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Datum saPlanData[4];
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Oid taPlanArgTypes[3] = {NAMEOID, CHAROID, INT4OID};
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Datum saPlanData[3];
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Oid taPlanArgTypes[4] = {NAMEOID,
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CHAROID,
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INT4OID};
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void *vpPlan;
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tCurTuple = tBeforeTuple ? tBeforeTuple : tAfterTuple;
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vpPlan = SPI_prepare(cpQueryBase, 3, taPlanArgTypes);
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if (vpPlan == NULL)
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elog(NOTICE, "error creating plan");
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/* SPI_saveplan(vpPlan); */
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ereport(ERROR,(errcode(ERRCODE_TRIGGERED_ACTION_EXCEPTION),
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errmsg("dbmirror:storePending error creating plan")));
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saPlanData[0] = PointerGetDatum(cpTableName);
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saPlanData[1] = CharGetDatum(cOp);
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saPlanData[2] = Int32GetDatum(GetCurrentTransactionId());
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iResult = SPI_execp(vpPlan, saPlanData, NULL, 1);
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iResult = SPI_execp(vpPlan, saPlanData, nulls, 1);
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if (iResult < 0)
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elog(NOTICE, "storedPending fired (%s) returned %d", cpQueryBase, iResult);
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elog(NOTICE, "storedPending fired (%s) returned %d",
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cpQueryBase, iResult);
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#if defined DEBUG_OUTPUT
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elog(NOTICE, "row successfully stored in pending table");
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#endif
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debug_msg("dbmirror:storePending row successfully stored in pending table");
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if (cOp == 'd')
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{
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@ -202,7 +242,8 @@ storePending(char *cpTableName, HeapTuple tBeforeTuple,
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* This is a record of a delete operation.
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* Just store the key data.
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*/
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iResult = storeKeyInfo(cpTableName, tBeforeTuple, tTupDesc, tpTrigData);
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iResult = storeKeyInfo(cpTableName,
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tBeforeTuple, tTupDesc, tableOid);
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}
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else if (cOp == 'i')
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{
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@ -210,20 +251,22 @@ storePending(char *cpTableName, HeapTuple tBeforeTuple,
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* An Insert operation.
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* Store all data
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*/
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iResult = storeData(cpTableName, tAfterTuple, tTupDesc, tpTrigData, TRUE);
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iResult = storeData(cpTableName, tAfterTuple,
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tTupDesc, tableOid,TRUE);
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}
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else
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{
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/* op must be an update. */
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iResult = storeKeyInfo(cpTableName, tBeforeTuple, tTupDesc, tpTrigData);
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iResult = iResult ? iResult : storeData(cpTableName, tAfterTuple, tTupDesc,
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tpTrigData, TRUE);
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iResult = storeKeyInfo(cpTableName, tBeforeTuple,
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tTupDesc, tableOid);
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iResult = iResult ? iResult :
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storeData(cpTableName, tAfterTuple, tTupDesc,
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tableOid,TRUE);
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}
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#if defined DEBUG_OUTPUT
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elog(NOTICE, "done storing keyinfo");
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#endif
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debug_msg("dbmirror:storePending done storing keyinfo");
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return iResult;
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@ -231,12 +274,11 @@ storePending(char *cpTableName, HeapTuple tBeforeTuple,
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int
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storeKeyInfo(char *cpTableName, HeapTuple tTupleData,
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TupleDesc tTupleDesc,
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TriggerData *tpTrigData)
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TupleDesc tTupleDesc, Oid tableOid)
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{
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Oid saPlanArgTypes[1] = {NAMEOID};
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char *insQuery = "INSERT INTO \"PendingData\" (\"SeqId\",\"IsKey\",\"Data\") VALUES(currval('\"Pending_SeqId_seq\"'),'t',$1)";
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char *insQuery = "INSERT INTO dbmirror_pendingdata (SeqId,IsKey,Data) VALUES(currval('dbmirror_pending_seqid_seq'),'t',$1)";
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void *pplan;
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Datum saPlanData[1];
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char *cpKeyData;
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@ -250,7 +292,7 @@ storeKeyInfo(char *cpTableName, HeapTuple tTupleData,
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}
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/* pplan = SPI_saveplan(pplan); */
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cpKeyData = packageData(tTupleData, tTupleDesc, tpTrigData, PRIMARY);
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cpKeyData = packageData(tTupleData, tTupleDesc,tableOid, PRIMARY);
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if (cpKeyData == NULL)
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ereport(ERROR,
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(errcode(ERRCODE_UNDEFINED_OBJECT),
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@ -258,9 +300,9 @@ storeKeyInfo(char *cpTableName, HeapTuple tTupleData,
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errmsg("there is no PRIMARY KEY for table %s",
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cpTableName)));
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#if defined DEBUG_OUTPUT
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elog(NOTICE, "key data: %s", cpKeyData);
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#endif
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debug_msg2("dbmirror:storeKeyInfo key data: %s", cpKeyData);
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saPlanData[0] = PointerGetDatum(cpKeyData);
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iRetCode = SPI_execp(pplan, saPlanData, NULL, 1);
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@ -270,12 +312,12 @@ storeKeyInfo(char *cpTableName, HeapTuple tTupleData,
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if (iRetCode != SPI_OK_INSERT)
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{
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elog(NOTICE, "error inserting row in pendingDelete");
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ereport(ERROR,(errcode(ERRCODE_TRIGGERED_ACTION_EXCEPTION)
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,errmsg("error inserting row in pendingDelete")));
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return -1;
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}
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#if defined DEBUG_OUTPUT
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elog(NOTICE, "insert successful");
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#endif
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debug_msg("insert successful");
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return 0;
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@ -318,12 +360,12 @@ getPrimaryKey(Oid tblOid)
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* Stores a copy of the non-key data for the row.
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*****************************************************************************/
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int
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storeData(char *cpTableName, HeapTuple tTupleData, TupleDesc tTupleDesc,
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TriggerData *tpTrigData, int iIncludeKeyData)
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storeData(char *cpTableName, HeapTuple tTupleData,
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TupleDesc tTupleDesc,Oid tableOid, int iIncludeKeyData)
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{
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Oid planArgTypes[1] = {NAMEOID};
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char *insQuery = "INSERT INTO \"PendingData\" (\"SeqId\",\"IsKey\",\"Data\") VALUES(currval('\"Pending_SeqId_seq\"'),'f',$1)";
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char *insQuery = "INSERT INTO dbmirror_pendingdata (SeqId,IsKey,Data) VALUES(currval('dbmirror_pending_seqid_seq'),'f',$1)";
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void *pplan;
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Datum planData[1];
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char *cpKeyData;
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@ -338,9 +380,10 @@ storeData(char *cpTableName, HeapTuple tTupleData, TupleDesc tTupleDesc,
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/* pplan = SPI_saveplan(pplan); */
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if (iIncludeKeyData == 0)
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cpKeyData = packageData(tTupleData, tTupleDesc, tpTrigData, NONPRIMARY);
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cpKeyData = packageData(tTupleData, tTupleDesc,
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tableOid, NONPRIMARY);
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else
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cpKeyData = packageData(tTupleData, tTupleDesc, tpTrigData, ALL);
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cpKeyData = packageData(tTupleData, tTupleDesc,tableOid, ALL);
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planData[0] = PointerGetDatum(cpKeyData);
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iRetValue = SPI_execp(pplan, planData, NULL, 1);
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@ -353,9 +396,9 @@ storeData(char *cpTableName, HeapTuple tTupleData, TupleDesc tTupleDesc,
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elog(NOTICE, "error inserting row in pendingDelete");
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return -1;
|
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}
|
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#if defined DEBUG_OUTPUT
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elog(NOTICE, "insert successful");
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#endif
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debug_msg("dbmirror:storeKeyData insert successful");
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return 0;
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@ -376,8 +419,7 @@ storeData(char *cpTableName, HeapTuple tTupleData, TupleDesc tTupleDesc,
|
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* ALL implies include all fields.
|
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*/
|
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char *
|
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packageData(HeapTuple tTupleData, TupleDesc tTupleDesc,
|
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TriggerData *tpTrigData,
|
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packageData(HeapTuple tTupleData, TupleDesc tTupleDesc, Oid tableOid,
|
||||
enum FieldUsage eKeyUsage)
|
||||
{
|
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int iNumCols;
|
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@ -391,14 +433,17 @@ packageData(HeapTuple tTupleData, TupleDesc tTupleDesc,
|
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|
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if (eKeyUsage != ALL)
|
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{
|
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tpPKeys = getPrimaryKey(tpTrigData->tg_relation->rd_id);
|
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tpPKeys = getPrimaryKey(tableOid);
|
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if (tpPKeys == NULL)
|
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return NULL;
|
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}
|
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#if defined DEBUG_OUTPUT
|
||||
|
||||
if (tpPKeys != NULL)
|
||||
elog(NOTICE, "have primary keys");
|
||||
#endif
|
||||
{
|
||||
debug_msg("dbmirror:packageData have primary keys");
|
||||
|
||||
}
|
||||
|
||||
cpDataBlock = SPI_palloc(BUFFER_SIZE);
|
||||
iDataBlockSize = BUFFER_SIZE;
|
||||
iUsedDataBlock = 0; /* To account for the null */
|
||||
@ -417,49 +462,58 @@ packageData(HeapTuple tTupleData, TupleDesc tTupleDesc,
|
||||
{
|
||||
/* Determine if this is a primary key or not. */
|
||||
iIsPrimaryKey = 0;
|
||||
for (iPrimaryKeyIndex = 0; (*tpPKeys)[iPrimaryKeyIndex] != 0;
|
||||
for (iPrimaryKeyIndex = 0;
|
||||
(*tpPKeys)[iPrimaryKeyIndex] != 0;
|
||||
iPrimaryKeyIndex++)
|
||||
{
|
||||
if ((*tpPKeys)[iPrimaryKeyIndex] == iColumnCounter)
|
||||
if ((*tpPKeys)[iPrimaryKeyIndex]
|
||||
== iColumnCounter)
|
||||
{
|
||||
iIsPrimaryKey = 1;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (iIsPrimaryKey ? (eKeyUsage != PRIMARY) : (eKeyUsage != NONPRIMARY))
|
||||
if (iIsPrimaryKey ? (eKeyUsage != PRIMARY) :
|
||||
(eKeyUsage != NONPRIMARY))
|
||||
{
|
||||
/**
|
||||
* Don't use.
|
||||
*/
|
||||
#if defined DEBUG_OUTPUT
|
||||
elog(NOTICE, "skipping column");
|
||||
#endif
|
||||
|
||||
debug_msg("dbmirror:packageData skipping column");
|
||||
|
||||
continue;
|
||||
}
|
||||
} /* KeyUsage!=ALL */
|
||||
#ifndef NODROPCOLUMN
|
||||
if(tTupleDesc->attrs[iColumnCounter-1]->attisdropped)
|
||||
{
|
||||
/**
|
||||
* This column has been dropped.
|
||||
* Do not mirror it.
|
||||
*/
|
||||
continue;
|
||||
}
|
||||
#endif
|
||||
cpFieldName = DatumGetPointer(NameGetDatum(&tTupleDesc->attrs
|
||||
[iColumnCounter - 1]->attname));
|
||||
#if defined DEBUG_OUTPUT
|
||||
elog(NOTICE, "field name: %s", cpFieldName);
|
||||
#endif
|
||||
while (iDataBlockSize - iUsedDataBlock < strlen(cpFieldName) + 6)
|
||||
|
||||
if(tTupleDesc->attrs[iColumnCounter-1]->attisdropped)
|
||||
{
|
||||
/**
|
||||
* This column has been dropped.
|
||||
* Do not mirror it.
|
||||
*/
|
||||
continue;
|
||||
}
|
||||
|
||||
cpFieldName = DatumGetPointer(NameGetDatum
|
||||
|
||||
(&tTupleDesc->attrs
|
||||
[iColumnCounter - 1]->attname));
|
||||
|
||||
debug_msg2("dbmirror:packageData field name: %s", cpFieldName);
|
||||
|
||||
while (iDataBlockSize - iUsedDataBlock <
|
||||
strlen(cpFieldName) + 6)
|
||||
{
|
||||
cpDataBlock = SPI_repalloc(cpDataBlock, iDataBlockSize + BUFFER_SIZE);
|
||||
cpDataBlock = SPI_repalloc(cpDataBlock,
|
||||
iDataBlockSize +
|
||||
BUFFER_SIZE);
|
||||
iDataBlockSize = iDataBlockSize + BUFFER_SIZE;
|
||||
}
|
||||
sprintf(cpDataBlock + iUsedDataBlock, "\"%s\"=", cpFieldName);
|
||||
iUsedDataBlock = iUsedDataBlock + strlen(cpFieldName) + 3;
|
||||
cpFieldData = SPI_getvalue(tTupleData, tTupleDesc, iColumnCounter);
|
||||
cpFieldData = SPI_getvalue(tTupleData, tTupleDesc,
|
||||
iColumnCounter);
|
||||
|
||||
cpUnFormatedPtr = cpFieldData;
|
||||
cpFormatedPtr = cpDataBlock + iUsedDataBlock;
|
||||
@ -477,15 +531,17 @@ packageData(HeapTuple tTupleData, TupleDesc tTupleDesc,
|
||||
continue;
|
||||
|
||||
}
|
||||
#if defined DEBUG_OUTPUT
|
||||
elog(NOTICE, "field data: \"%s\"", cpFieldData);
|
||||
elog(NOTICE, "starting format loop");
|
||||
#endif
|
||||
debug_msg2("dbmirror:packageData field data: \"%s\"",
|
||||
cpFieldData);
|
||||
debug_msg("dbmirror:packageData starting format loop");
|
||||
|
||||
while (*cpUnFormatedPtr != 0)
|
||||
{
|
||||
while (iDataBlockSize - iUsedDataBlock < 2)
|
||||
{
|
||||
cpDataBlock = SPI_repalloc(cpDataBlock, iDataBlockSize + BUFFER_SIZE);
|
||||
cpDataBlock = SPI_repalloc(cpDataBlock,
|
||||
iDataBlockSize
|
||||
+ BUFFER_SIZE);
|
||||
iDataBlockSize = iDataBlockSize + BUFFER_SIZE;
|
||||
cpFormatedPtr = cpDataBlock + iUsedDataBlock;
|
||||
}
|
||||
@ -505,25 +561,218 @@ packageData(HeapTuple tTupleData, TupleDesc tTupleDesc,
|
||||
|
||||
while (iDataBlockSize - iUsedDataBlock < 3)
|
||||
{
|
||||
cpDataBlock = SPI_repalloc(cpDataBlock, iDataBlockSize + BUFFER_SIZE);
|
||||
cpDataBlock = SPI_repalloc(cpDataBlock,
|
||||
iDataBlockSize +
|
||||
BUFFER_SIZE);
|
||||
iDataBlockSize = iDataBlockSize + BUFFER_SIZE;
|
||||
cpFormatedPtr = cpDataBlock + iUsedDataBlock;
|
||||
}
|
||||
sprintf(cpFormatedPtr, "' ");
|
||||
iUsedDataBlock = iUsedDataBlock + 2;
|
||||
#if defined DEBUG_OUTPUT
|
||||
elog(NOTICE, "data block: \"%s\"", cpDataBlock);
|
||||
#endif
|
||||
|
||||
debug_msg2("dbmirror:packageData data block: \"%s\"",
|
||||
cpDataBlock);
|
||||
|
||||
} /* for iColumnCounter */
|
||||
if (tpPKeys != NULL)
|
||||
SPI_pfree(tpPKeys);
|
||||
#if defined DEBUG_OUTPUT
|
||||
elog(NOTICE, "returning DataBlockSize:%d iUsedDataBlock:%d", iDataBlockSize,
|
||||
iUsedDataBlock);
|
||||
#endif
|
||||
|
||||
debug_msg3("dbmirror:packageData returning DataBlockSize:%d iUsedDataBlock:%d",
|
||||
iDataBlockSize,
|
||||
iUsedDataBlock);
|
||||
|
||||
memset(cpDataBlock + iUsedDataBlock, 0, iDataBlockSize - iUsedDataBlock);
|
||||
|
||||
return cpDataBlock;
|
||||
|
||||
}
|
||||
|
||||
|
||||
PG_FUNCTION_INFO_V1(setval);
|
||||
|
||||
Datum setval(PG_FUNCTION_ARGS)
|
||||
{
|
||||
|
||||
|
||||
text * sequenceName;
|
||||
|
||||
Oid setvalArgTypes[2] = {TEXTOID,INT4OID};
|
||||
int nextValue;
|
||||
void * setvalPlan=NULL;
|
||||
Datum setvalData[2];
|
||||
const char * setvalQuery = "SELECT setval_pg($1,$2)";
|
||||
int ret;
|
||||
|
||||
sequenceName = PG_GETARG_TEXT_P(0);
|
||||
nextValue = PG_GETARG_INT32(1);
|
||||
|
||||
setvalData[0] = PointerGetDatum(sequenceName);
|
||||
setvalData[1] = Int32GetDatum(nextValue);
|
||||
|
||||
if (SPI_connect() < 0)
|
||||
{
|
||||
ereport(ERROR,(errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
|
||||
errmsg("dbmirror:setval could not connect to SPI")));
|
||||
return -1;
|
||||
}
|
||||
|
||||
setvalPlan = SPI_prepare(setvalQuery,2,setvalArgTypes);
|
||||
if(setvalPlan == NULL)
|
||||
{
|
||||
ereport(ERROR,(errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
|
||||
errmsg("dbmirror:setval could not prepare plan")));
|
||||
return -1;
|
||||
}
|
||||
|
||||
ret = SPI_execp(setvalPlan,setvalData,NULL,1);
|
||||
|
||||
if(ret != SPI_OK_SELECT || SPI_processed != 1)
|
||||
return -1;
|
||||
|
||||
debug_msg2("dbmirror:setval: setval_pg returned ok:%d",nextValue);
|
||||
|
||||
ret = saveSequenceUpdate(sequenceName,nextValue);
|
||||
|
||||
SPI_pfree(setvalPlan);
|
||||
|
||||
SPI_finish();
|
||||
debug_msg("dbmirror:setval about to return");
|
||||
return Int64GetDatum(nextValue);
|
||||
|
||||
}
|
||||
|
||||
|
||||
|
||||
PG_FUNCTION_INFO_V1(nextval);
|
||||
|
||||
Datum
|
||||
nextval(PG_FUNCTION_ARGS)
|
||||
{
|
||||
text * sequenceName;
|
||||
|
||||
const char * nextvalQuery = "SELECT nextval_pg($1)";
|
||||
Oid nextvalArgTypes[1] = {TEXTOID};
|
||||
void * nextvalPlan=NULL;
|
||||
Datum nextvalData[1];
|
||||
|
||||
|
||||
int ret;
|
||||
HeapTuple resTuple;
|
||||
char isNull;
|
||||
int nextSequenceValue;
|
||||
|
||||
|
||||
|
||||
debug_msg("dbmirror:nextval Starting pending.so:nextval");
|
||||
|
||||
|
||||
sequenceName = PG_GETARG_TEXT_P(0);
|
||||
|
||||
if (SPI_connect() < 0)
|
||||
{
|
||||
ereport(ERROR,(errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
|
||||
errmsg("dbmirror:nextval could not connect to SPI")));
|
||||
return -1;
|
||||
}
|
||||
|
||||
nextvalPlan = SPI_prepare(nextvalQuery,1,nextvalArgTypes);
|
||||
|
||||
|
||||
debug_msg("prepared plan to call nextval_pg");
|
||||
|
||||
|
||||
if(nextvalPlan==NULL)
|
||||
{
|
||||
ereport(ERROR,(errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
|
||||
errmsg("dbmirror:nextval error creating plan")));
|
||||
return -1;
|
||||
}
|
||||
nextvalData[0] = PointerGetDatum(sequenceName);
|
||||
|
||||
ret = SPI_execp(nextvalPlan,nextvalData,NULL,1);
|
||||
|
||||
debug_msg("dbmirror:Executed call to nextval_pg");
|
||||
|
||||
|
||||
if(ret != SPI_OK_SELECT || SPI_processed != 1)
|
||||
return -1;
|
||||
|
||||
resTuple = SPI_tuptable->vals[0];
|
||||
|
||||
debug_msg("dbmirror:nextval Set resTuple");
|
||||
|
||||
nextSequenceValue =*(DatumGetPointer(SPI_getbinval(resTuple,
|
||||
SPI_tuptable->tupdesc,
|
||||
1,&isNull)));
|
||||
|
||||
|
||||
|
||||
debug_msg2("dbmirror:nextval Set SPI_getbinval:%d",nextSequenceValue);
|
||||
|
||||
|
||||
saveSequenceUpdate(sequenceName,nextSequenceValue);
|
||||
SPI_pfree(resTuple);
|
||||
SPI_pfree(nextvalPlan);
|
||||
|
||||
SPI_finish();
|
||||
|
||||
return Int64GetDatum(nextSequenceValue);
|
||||
}
|
||||
|
||||
|
||||
int
|
||||
saveSequenceUpdate(const text * sequenceName,
|
||||
int nextSequenceVal)
|
||||
{
|
||||
|
||||
Oid insertArgTypes[2] = {TEXTOID,INT4OID};
|
||||
Oid insertDataArgTypes[1] = {NAMEOID};
|
||||
void * insertPlan=NULL;
|
||||
void * insertDataPlan=NULL;
|
||||
Datum insertDatum[2];
|
||||
Datum insertDataDatum[1];
|
||||
char nextSequenceText[32];
|
||||
|
||||
const char * insertQuery =
|
||||
"INSERT INTO dbmirror_Pending (TableName,Op,XID) VALUES" \
|
||||
"($1,'s',$2)";
|
||||
const char * insertDataQuery =
|
||||
"INSERT INTO dbmirror_PendingData(SeqId,IsKey,Data) VALUES " \
|
||||
"(currval('dbmirror_pending_seqid_seq'),'t',$1)";
|
||||
|
||||
int ret;
|
||||
|
||||
|
||||
insertPlan = SPI_prepare(insertQuery,2,insertArgTypes);
|
||||
insertDataPlan = SPI_prepare(insertDataQuery,1,insertDataArgTypes);
|
||||
|
||||
debug_msg("Prepared insert query");
|
||||
|
||||
|
||||
if(insertPlan == NULL || insertDataPlan == NULL)
|
||||
{
|
||||
ereport(ERROR,(errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),errmsg("dbmirror:nextval error creating plan")));
|
||||
}
|
||||
|
||||
insertDatum[1] = Int32GetDatum(GetCurrentTransactionId());
|
||||
insertDatum[0] = PointerGetDatum(sequenceName);
|
||||
|
||||
sprintf(nextSequenceText,"%d",nextSequenceVal);
|
||||
insertDataDatum[0] = PointerGetDatum(nextSequenceText);
|
||||
debug_msg2("dbmirror:savesequenceupdate: Setting value %s",
|
||||
nextSequenceText);
|
||||
|
||||
debug_msg("dbmirror:About to execute insert query");
|
||||
|
||||
ret = SPI_execp(insertPlan,insertDatum,NULL,1);
|
||||
|
||||
ret = SPI_execp(insertDataPlan,insertDataDatum,NULL,1);
|
||||
|
||||
debug_msg("dbmirror:Insert query finished");
|
||||
SPI_pfree(insertPlan);
|
||||
SPI_pfree(insertDataPlan);
|
||||
|
||||
return ret;
|
||||
|
||||
}
|
||||
|
||||
|
||||
Reference in New Issue
Block a user