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/*-------------------------------------------------------------------------
*
* trigger.h--
* prototypes for trigger.c.
*
*
*-------------------------------------------------------------------------
*/
#ifndef TRIGGER_H
#define TRIGGER_H
#include "access/tupdesc.h"
#include "access/htup.h"
#include "nodes/parsenodes.h"
#include "utils/rel.h"
typedef uint32 TriggerEvent;
typedef struct TriggerData
{
TriggerEvent tg_event;
Relation tg_relation;
HeapTuple tg_trigtuple;
HeapTuple tg_newtuple;
Trigger *tg_trigger;
} TriggerData;
extern TriggerData *CurrentTriggerData;
#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_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 HeapTuple ExecBRInsertTriggers(Relation rel, HeapTuple tuple);
extern void ExecARInsertTriggers(Relation rel, HeapTuple tuple);
extern bool ExecBRDeleteTriggers(Relation rel, ItemPointer tupleid);
extern void ExecARDeleteTriggers(Relation rel, ItemPointer tupleid);
extern HeapTuple ExecBRUpdateTriggers(Relation rel, ItemPointer tupleid, HeapTuple tuple);
extern void ExecARUpdateTriggers(Relation rel, ItemPointer tupleid, HeapTuple tuple);
#endif /* TRIGGER_H */
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