207 lines
7.9 KiB
C
207 lines
7.9 KiB
C
/* -------------------------------------------------------------------------
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*
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* trigger.h
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* Declarations for trigger handling.
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*
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* Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/commands/trigger.h
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*
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* -------------------------------------------------------------------------
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*/
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#ifndef TRIGGER_H
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#define TRIGGER_H
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#include "catalog/objectaddress.h"
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#include "nodes/execnodes.h"
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#include "nodes/parsenodes.h"
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#define InvalidTgOwnerId ((Oid)(-1)) /* An invalid trigger owner oid, for old version pg_trigger */
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/*
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* TriggerData is the node type that is passed as fmgr "context" info
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* when a function is called by the trigger manager.
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*/
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#define CALLED_AS_TRIGGER(fcinfo) ((fcinfo)->context != NULL && IsA((fcinfo)->context, TriggerData))
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typedef uint32 TriggerEvent;
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typedef struct TriggerData {
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NodeTag type;
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TriggerEvent tg_event;
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Relation tg_relation;
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HeapTuple tg_trigtuple;
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HeapTuple tg_newtuple;
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Trigger* tg_trigger;
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Buffer tg_trigtuplebuf;
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Buffer tg_newtuplebuf;
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} TriggerData;
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/*
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* TriggerEvent bit flags
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*
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* Note that we assume different event types (INSERT/DELETE/UPDATE/TRUNCATE)
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* can't be OR'd together in a single TriggerEvent. This is unlike the
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* situation for pg_trigger rows, so pg_trigger.tgtype uses a different
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* representation!
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*/
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#define TRIGGER_EVENT_INSERT 0x00000000
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#define TRIGGER_EVENT_DELETE 0x00000001
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#define TRIGGER_EVENT_UPDATE 0x00000002
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#define TRIGGER_EVENT_TRUNCATE 0x00000003
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#define TRIGGER_EVENT_OPMASK 0x00000003
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#define TRIGGER_EVENT_ROW 0x00000004
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#define TRIGGER_EVENT_BEFORE 0x00000008
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#define TRIGGER_EVENT_AFTER 0x00000000
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#define TRIGGER_EVENT_INSTEAD 0x00000010
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#define TRIGGER_EVENT_TIMINGMASK 0x00000018
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/* More TriggerEvent flags, used only within trigger.c */
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#define AFTER_TRIGGER_DEFERRABLE 0x00000020
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#define AFTER_TRIGGER_INITDEFERRED 0x00000040
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#define TRIGGER_FIRED_BY_INSERT(event) (((event)&TRIGGER_EVENT_OPMASK) == TRIGGER_EVENT_INSERT)
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#define TRIGGER_FIRED_BY_DELETE(event) (((event)&TRIGGER_EVENT_OPMASK) == TRIGGER_EVENT_DELETE)
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#define TRIGGER_FIRED_BY_UPDATE(event) (((event)&TRIGGER_EVENT_OPMASK) == TRIGGER_EVENT_UPDATE)
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#define TRIGGER_FIRED_BY_TRUNCATE(event) (((event)&TRIGGER_EVENT_OPMASK) == TRIGGER_EVENT_TRUNCATE)
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#define TRIGGER_FIRED_FOR_ROW(event) ((event)&TRIGGER_EVENT_ROW)
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#define TRIGGER_FIRED_FOR_STATEMENT(event) (!TRIGGER_FIRED_FOR_ROW(event))
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#define TRIGGER_FIRED_BEFORE(event) (((event)&TRIGGER_EVENT_TIMINGMASK) == TRIGGER_EVENT_BEFORE)
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#define TRIGGER_FIRED_AFTER(event) (((event)&TRIGGER_EVENT_TIMINGMASK) == TRIGGER_EVENT_AFTER)
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#define TRIGGER_FIRED_INSTEAD(event) (((event)&TRIGGER_EVENT_TIMINGMASK) == TRIGGER_EVENT_INSTEAD)
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/*
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* Definitions for replication role based firing.
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*/
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#define SESSION_REPLICATION_ROLE_ORIGIN 0
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#define SESSION_REPLICATION_ROLE_REPLICA 1
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#define SESSION_REPLICATION_ROLE_LOCAL 2
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extern THR_LOCAL PGDLLIMPORT int SessionReplicationRole;
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/*
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* States at which a trigger can be fired. These are the
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* possible values for pg_trigger.tgenabled.
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*/
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#define TRIGGER_FIRES_ON_ORIGIN 'O'
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#define TRIGGER_FIRES_ALWAYS 'A'
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#define TRIGGER_FIRES_ON_REPLICA 'R'
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#define TRIGGER_DISABLED 'D'
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extern ObjectAddress CreateTrigger(CreateTrigStmt* stmt, const char* queryString, Oid relOid, Oid refRelOid, Oid constraintOid,
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Oid indexOid, bool isInternal);
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extern void RemoveTriggerById(Oid trigOid);
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extern Oid get_trigger_oid(Oid relid, const char* name, bool missing_ok);
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extern Oid get_trigger_oid_b(const char* name, Oid* reloid, bool missing_ok);
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extern ObjectAddress renametrig(RenameStmt* stmt);
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extern void EnableDisableTrigger(Relation rel, const char* tgname, char fires_when, bool skip_system);
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extern void RelationBuildTriggers(Relation relation);
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extern TriggerDesc* CopyTriggerDesc(TriggerDesc* trigdesc);
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extern void FreeTriggerDesc(TriggerDesc* trigdesc);
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extern void ExecBSInsertTriggers(EState* estate, ResultRelInfo* relinfo);
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extern void ExecASInsertTriggers(EState* estate, ResultRelInfo* relinfo);
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extern TupleTableSlot* ExecBRInsertTriggers(EState* estate, ResultRelInfo* relinfo, TupleTableSlot* slot);
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extern void ExecARInsertTriggers(
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EState* estate, ResultRelInfo* relinfo, Oid insertPartition, int2 bucketid, HeapTuple trigtuple, List* recheckIndexes);
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extern TupleTableSlot* ExecIRInsertTriggers(EState* estate, ResultRelInfo* relinfo, TupleTableSlot* slot);
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extern void ExecBSDeleteTriggers(EState* estate, ResultRelInfo* relinfo);
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extern void ExecASDeleteTriggers(EState* estate, ResultRelInfo* relinfo);
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extern bool ExecBRDeleteTriggers(EState* estate, EPQState* epqstate, ResultRelInfo* relinfo, Oid deletePartitionOid,
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int2 bucketid,
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#ifdef PGXC
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HeapTupleHeader datanode_tuphead,
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#endif
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ItemPointer tupleid);
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extern void ExecARDeleteTriggers(EState* estate, ResultRelInfo* relinfo, Oid deletePartitionOid, int2 bucketid,
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#ifdef PGXC
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HeapTupleHeader trigtuphead,
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#endif
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ItemPointer tupleid);
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extern bool ExecIRDeleteTriggers(EState* estate, ResultRelInfo* relinfo, HeapTuple trigtuple);
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extern void ExecBSUpdateTriggers(EState* estate, ResultRelInfo* relinfo);
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extern void ExecASUpdateTriggers(EState* estate, ResultRelInfo* relinfo);
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extern TupleTableSlot* ExecBRUpdateTriggers(EState* estate, EPQState* epqstate, ResultRelInfo* relinfo,
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Oid oldPartitionOid, int2 bucketid,
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#ifdef PGXC
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HeapTupleHeader datanode_tuphead,
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#endif
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ItemPointer tupleid, TupleTableSlot* slot);
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extern void ExecARUpdateTriggers(EState* estate, ResultRelInfo* relinfo, Oid oldPartitionOid, int2 bucketid, Oid newPartitionOid,
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ItemPointer tupleid, HeapTuple newtuple,
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#ifdef PGXC
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HeapTupleHeader trigtuphead,
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#endif
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List* recheckIndexes);
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extern TupleTableSlot* ExecIRUpdateTriggers(
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EState* estate, ResultRelInfo* relinfo, HeapTuple trigtuple, TupleTableSlot* slot);
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extern void ExecBSTruncateTriggers(EState* estate, ResultRelInfo* relinfo);
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extern void ExecASTruncateTriggers(EState* estate, ResultRelInfo* relinfo);
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extern void AfterTriggerBeginXact(void);
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extern void AfterTriggerBeginQuery(void);
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extern void AfterTriggerEndQuery(EState* estate);
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extern void AfterTriggerFireDeferred(void);
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extern bool IsAfterTriggerBegin(void);
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#ifdef PGXC
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extern bool IsAnyAfterTriggerDeferred(void);
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#endif
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extern void AfterTriggerEndXact(bool isCommit);
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extern void AfterTriggerBeginSubXact(void);
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extern void AfterTriggerEndSubXact(bool isCommit);
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extern void AfterTriggerSetState(ConstraintsSetStmt* stmt);
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extern bool AfterTriggerPendingOnRel(Oid relid);
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/*
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* in utils/adt/ri_triggers.c
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*/
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extern bool RI_FKey_keyequal_upd_pk(Trigger* trigger, Relation pk_rel, HeapTuple old_row, HeapTuple new_row);
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extern bool RI_FKey_keyequal_upd_fk(Trigger* trigger, Relation fk_rel, HeapTuple old_row, HeapTuple new_row);
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extern bool RI_Initial_Check(Trigger* trigger, Relation fk_rel, Relation pk_rel);
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/* result values for RI_FKey_trigger_type: */
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#define RI_TRIGGER_PK 1 /* is a trigger on the PK relation */
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#define RI_TRIGGER_FK 2 /* is a trigger on the FK relation */
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#define RI_TRIGGER_NONE 0 /* is not an RI trigger function */
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extern int RI_FKey_trigger_type(Oid tgfoid);
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extern Datum pg_trigger_depth(PG_FUNCTION_ARGS);
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#ifdef PGXC
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/* Postgres-XC related functions for triggers */
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extern bool pgxc_trig_oldrow_reqd(Relation rel, CmdType commandType);
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extern int16 pgxc_get_trigevent(CmdType commandType);
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extern bool pgxc_should_exec_br_trigger(Relation rel, int16 trigevent, EState* estate = NULL);
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extern bool pgxc_has_trigger_for_event(int16 tg_event, TriggerDesc* trigdesc);
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#endif
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extern void InvalidRelcacheForTriggerFunction(Oid funcoid, Oid returnType);
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extern void ResetTrigShipFlag();
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extern HeapTuple GetTupleForTrigger(EState* estate, EPQState* epqstate, ResultRelInfo* relinfo, Oid targetPartitionOid,
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int2 bucketid, ItemPointer tid, LockTupleMode lockmode, TupleTableSlot** newSlot);
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#endif /* TRIGGER_H */
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