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1547ee017c
Implements the CREATE CONSTRAINT TRIGGER and SET CONSTRAINTS commands.
TODO:
Generic builtin trigger procedures
Automatic execution of appropriate CREATE CONSTRAINT... at CREATE TABLE
Support of new trigger type in pg_dump
Swapping of huge # of events to disk
Jan
121 lines
3.4 KiB
C
121 lines
3.4 KiB
C
/*-------------------------------------------------------------------------
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*
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* trigger.h
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* prototypes for trigger.c.
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*
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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 "nodes/execnodes.h"
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#include "nodes/parsenodes.h"
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typedef uint32 TriggerEvent;
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typedef struct TriggerData
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{
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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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} TriggerData;
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extern DLLIMPORT TriggerData *CurrentTriggerData;
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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_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_DEFERRED_DONE 0x00000010
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#define TRIGGER_DEFERRED_CANCELED 0x00000020
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#define TRIGGER_DEFERRED_DEFERRABLE 0x00000040
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#define TRIGGER_DEFERRED_INITDEFERRED 0x00000080
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#define TRIGGER_DEFERRED_HAS_BEFORE 0x00000100
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#define TRIGGER_DEFERRED_MASK 0x000001F0
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#define TRIGGER_FIRED_BY_INSERT(event) \
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(((TriggerEvent) (event) & TRIGGER_EVENT_OPMASK) == \
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TRIGGER_EVENT_INSERT)
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#define TRIGGER_FIRED_BY_DELETE(event) \
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(((TriggerEvent) (event) & TRIGGER_EVENT_OPMASK) == \
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TRIGGER_EVENT_DELETE)
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#define TRIGGER_FIRED_BY_UPDATE(event) \
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(((TriggerEvent) (event) & TRIGGER_EVENT_OPMASK) == \
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TRIGGER_EVENT_UPDATE)
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#define TRIGGER_FIRED_FOR_ROW(event) \
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((TriggerEvent) (event) & TRIGGER_EVENT_ROW)
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#define TRIGGER_FIRED_FOR_STATEMENT(event) \
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(!TRIGGER_FIRED_FOR_ROW (event))
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#define TRIGGER_FIRED_BEFORE(event) \
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((TriggerEvent) (event) & TRIGGER_EVENT_BEFORE)
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#define TRIGGER_FIRED_AFTER(event) \
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(!TRIGGER_FIRED_BEFORE (event))
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extern void CreateTrigger(CreateTrigStmt *stmt);
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extern void DropTrigger(DropTrigStmt *stmt);
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extern void RelationRemoveTriggers(Relation rel);
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extern HeapTuple ExecBRInsertTriggers(Relation rel, HeapTuple tuple);
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extern void ExecARInsertTriggers(Relation rel, HeapTuple tuple);
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extern bool ExecBRDeleteTriggers(EState *estate, ItemPointer tupleid);
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extern void ExecARDeleteTriggers(EState *estate, ItemPointer tupleid);
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extern HeapTuple ExecBRUpdateTriggers(EState *estate, ItemPointer tupleid, HeapTuple tuple);
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extern void ExecARUpdateTriggers(EState *estate, ItemPointer tupleid, HeapTuple tuple);
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/* ----------
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* Deferred trigger stuff
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* ----------
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*/
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typedef struct DeferredTriggerStatusData {
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Oid dts_tgoid;
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bool dts_tgisdeferred;
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} DeferredTriggerStatusData;
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typedef struct DeferredTriggerStatusData *DeferredTriggerStatus;
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typedef struct DeferredTriggerEventItem {
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Oid dti_tgoid;
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int32 dti_state;
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} DeferredTriggerEventItem;
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typedef struct DeferredTriggerEventData {
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int32 dte_event;
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Oid dte_relid;
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ItemPointerData dte_oldctid;
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ItemPointerData dte_newctid;
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int32 dte_n_items;
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DeferredTriggerEventItem dte_item[1];
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} DeferredTriggerEventData;
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typedef struct DeferredTriggerEventData *DeferredTriggerEvent;
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extern int DeferredTriggerInit(void);
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extern void DeferredTriggerBeginXact(void);
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extern void DeferredTriggerEndQuery(void);
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extern void DeferredTriggerEndXact(void);
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extern void DeferredTriggerAbortXact(void);
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extern void DeferredTriggerSetState(ConstraintsSetStmt *stmt);
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extern void DeferredTriggerSaveEvent(Relation rel, int event,
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HeapTuple oldtup, HeapTuple newtup);
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#endif /* TRIGGER_H */
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