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/*-------------------------------------------------------------------------
*
* trigger.h
* Declarations for trigger handling.
*
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: trigger.h,v 1.29 2001/10/28 06:26:06 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef TRIGGER_H
#define TRIGGER_H
#include "nodes/execnodes.h"
#include "nodes/parsenodes.h"
/*
* TriggerData is the node type that is passed as fmgr "context" info
* when a function is called by the trigger manager.
*/
#define CALLED_AS_TRIGGER(fcinfo) \
((fcinfo)->context != NULL && IsA((fcinfo)->context, TriggerData))
typedef uint32 TriggerEvent;
typedef struct TriggerData
{
NodeTag type;
TriggerEvent tg_event;
Relation tg_relation;
HeapTuple tg_trigtuple;
HeapTuple tg_newtuple;
Trigger *tg_trigger;
} TriggerData;
/* TriggerEvent bit flags */
#define TRIGGER_EVENT_INSERT 0x00000000
#define TRIGGER_EVENT_DELETE 0x00000001
#define TRIGGER_EVENT_UPDATE 0x00000002
#define TRIGGER_EVENT_OPMASK 0x00000003
#define TRIGGER_EVENT_ROW 0x00000004
#define TRIGGER_EVENT_BEFORE 0x00000008
#define TRIGGER_DEFERRED_DONE 0x00000010
#define TRIGGER_DEFERRED_CANCELED 0x00000020
#define TRIGGER_DEFERRED_DEFERRABLE 0x00000040
#define TRIGGER_DEFERRED_INITDEFERRED 0x00000080
#define TRIGGER_DEFERRED_HAS_BEFORE 0x00000100
#define TRIGGER_DEFERRED_ROW_INSERTED 0x00000200
#define TRIGGER_DEFERRED_KEY_CHANGED 0x00000400
#define TRIGGER_DEFERRED_MASK 0x000007F0
#define TRIGGER_FIRED_BY_INSERT(event) \
(((TriggerEvent) (event) & TRIGGER_EVENT_OPMASK) == \
TRIGGER_EVENT_INSERT)
#define TRIGGER_FIRED_BY_DELETE(event) \
(((TriggerEvent) (event) & TRIGGER_EVENT_OPMASK) == \
TRIGGER_EVENT_DELETE)
#define TRIGGER_FIRED_BY_UPDATE(event) \
(((TriggerEvent) (event) & TRIGGER_EVENT_OPMASK) == \
TRIGGER_EVENT_UPDATE)
#define TRIGGER_FIRED_FOR_ROW(event) \
((TriggerEvent) (event) & TRIGGER_EVENT_ROW)
#define TRIGGER_FIRED_FOR_STATEMENT(event) \
(!TRIGGER_FIRED_FOR_ROW (event))
#define TRIGGER_FIRED_BEFORE(event) \
((TriggerEvent) (event) & TRIGGER_EVENT_BEFORE)
#define TRIGGER_FIRED_AFTER(event) \
(!TRIGGER_FIRED_BEFORE (event))
extern void CreateTrigger(CreateTrigStmt *stmt);
extern void DropTrigger(DropTrigStmt *stmt);
extern void RelationRemoveTriggers(Relation rel);
extern void RelationBuildTriggers(Relation relation);
extern void FreeTriggerDesc(TriggerDesc *trigdesc);
extern bool equalTriggerDescs(TriggerDesc *trigdesc1, TriggerDesc *trigdesc2);
extern HeapTuple ExecBRInsertTriggers(EState *estate,
ResultRelInfo *relinfo,
HeapTuple trigtuple);
extern void ExecARInsertTriggers(EState *estate,
ResultRelInfo *relinfo,
HeapTuple trigtuple);
extern bool ExecBRDeleteTriggers(EState *estate,
ResultRelInfo *relinfo,
ItemPointer tupleid);
extern void ExecARDeleteTriggers(EState *estate,
ResultRelInfo *relinfo,
ItemPointer tupleid);
extern HeapTuple ExecBRUpdateTriggers(EState *estate,
ResultRelInfo *relinfo,
ItemPointer tupleid,
HeapTuple newtuple);
extern void ExecARUpdateTriggers(EState *estate,
ResultRelInfo *relinfo,
ItemPointer tupleid,
HeapTuple newtuple);
/* ----------
* Deferred trigger stuff
* ----------
*/
typedef struct DeferredTriggerStatusData
{
Oid dts_tgoid;
bool dts_tgisdeferred;
} DeferredTriggerStatusData;
typedef struct DeferredTriggerStatusData *DeferredTriggerStatus;
typedef struct DeferredTriggerEventItem
{
Oid dti_tgoid;
int32 dti_state;
} DeferredTriggerEventItem;
typedef struct DeferredTriggerEventData *DeferredTriggerEvent;
typedef struct DeferredTriggerEventData
{
DeferredTriggerEvent dte_next; /* list link */
int32 dte_event;
Oid dte_relid;
ItemPointerData dte_oldctid;
ItemPointerData dte_newctid;
int32 dte_n_items;
/* dte_item is actually a variable-size array, of length dte_n_items */
DeferredTriggerEventItem dte_item[1];
} DeferredTriggerEventData;
extern void DeferredTriggerInit(void);
extern void DeferredTriggerBeginXact(void);
extern void DeferredTriggerEndQuery(void);
extern void DeferredTriggerEndXact(void);
extern void DeferredTriggerAbortXact(void);
extern void DeferredTriggerSetState(ConstraintsSetStmt *stmt);
/*
* in utils/adt/ri_triggers.c
*
*/
extern bool RI_FKey_keyequal_upd(TriggerData *trigdata);
#endif /* TRIGGER_H */
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