init

pg_include/catalog/pg_trigger.h

@@ -0,0 +1,145 @@
+/*-------------------------------------------------------------------------
+ *
+ * pg_trigger.h
+ *	  definition of the system "trigger" relation (pg_trigger)
+ *	  along with the relation's initial contents.
+ *
+ *
+ * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/catalog/pg_trigger.h
+ *
+ * NOTES
+ *	  the genbki.pl script reads this file and generates .bki
+ *	  information from the DATA() statements.
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef PG_TRIGGER_H
+#define PG_TRIGGER_H
+
+#include "catalog/genbki.h"
+
+/* ----------------
+ *		pg_trigger definition.	cpp turns this into
+ *		typedef struct FormData_pg_trigger
+ *
+ * Note: when tgconstraint is nonzero, tgconstrrelid, tgconstrindid,
+ * tgdeferrable, and tginitdeferred are largely redundant with the referenced
+ * pg_constraint entry.  However, it is possible for a non-deferrable trigger
+ * to be associated with a deferrable constraint.
+ * ----------------
+ */
+#define TriggerRelationId  2620
+
+CATALOG(pg_trigger,2620)
+{
+	Oid			tgrelid;		/* relation trigger is attached to */
+	NameData	tgname;			/* trigger's name */
+	Oid			tgfoid;			/* OID of function to be called */
+	int2		tgtype;			/* BEFORE/AFTER/INSTEAD, UPDATE/DELETE/INSERT,
+								 * ROW/STATEMENT; see below */
+	char		tgenabled;		/* trigger's firing configuration WRT
+								 * session_replication_role */
+	bool		tgisinternal;	/* trigger is system-generated */
+	Oid			tgconstrrelid;	/* constraint's FROM table, if any */
+	Oid			tgconstrindid;	/* constraint's supporting index, if any */
+	Oid			tgconstraint;	/* associated pg_constraint entry, if any */
+	bool		tgdeferrable;	/* constraint trigger is deferrable */
+	bool		tginitdeferred; /* constraint trigger is deferred initially */
+	int2		tgnargs;		/* # of extra arguments in tgargs */
+
+	/*
+	 * Variable-length fields start here, but we allow direct access to
+	 * tgattr. Note: tgattr and tgargs must not be null.
+	 */
+	int2vector	tgattr;			/* column numbers, if trigger is on columns */
+
+#ifdef CATALOG_VARLEN
+	bytea		tgargs;			/* first\000second\000tgnargs\000 */
+	pg_node_tree tgqual;		/* WHEN expression, or NULL if none */
+#endif
+} FormData_pg_trigger;
+
+/* ----------------
+ *		Form_pg_trigger corresponds to a pointer to a tuple with
+ *		the format of pg_trigger relation.
+ * ----------------
+ */
+typedef FormData_pg_trigger *Form_pg_trigger;
+
+/* ----------------
+ *		compiler constants for pg_trigger
+ * ----------------
+ */
+#define Natts_pg_trigger				15
+#define Anum_pg_trigger_tgrelid			1
+#define Anum_pg_trigger_tgname			2
+#define Anum_pg_trigger_tgfoid			3
+#define Anum_pg_trigger_tgtype			4
+#define Anum_pg_trigger_tgenabled		5
+#define Anum_pg_trigger_tgisinternal	6
+#define Anum_pg_trigger_tgconstrrelid	7
+#define Anum_pg_trigger_tgconstrindid	8
+#define Anum_pg_trigger_tgconstraint	9
+#define Anum_pg_trigger_tgdeferrable	10
+#define Anum_pg_trigger_tginitdeferred	11
+#define Anum_pg_trigger_tgnargs			12
+#define Anum_pg_trigger_tgattr			13
+#define Anum_pg_trigger_tgargs			14
+#define Anum_pg_trigger_tgqual			15
+
+/* Bits within tgtype */
+#define TRIGGER_TYPE_ROW				(1 << 0)
+#define TRIGGER_TYPE_BEFORE				(1 << 1)
+#define TRIGGER_TYPE_INSERT				(1 << 2)
+#define TRIGGER_TYPE_DELETE				(1 << 3)
+#define TRIGGER_TYPE_UPDATE				(1 << 4)
+#define TRIGGER_TYPE_TRUNCATE			(1 << 5)
+#define TRIGGER_TYPE_INSTEAD			(1 << 6)
+
+#define TRIGGER_TYPE_LEVEL_MASK			(TRIGGER_TYPE_ROW)
+#define TRIGGER_TYPE_STATEMENT			0
+
+/* Note bits within TRIGGER_TYPE_TIMING_MASK aren't adjacent */
+#define TRIGGER_TYPE_TIMING_MASK \
+	(TRIGGER_TYPE_BEFORE | TRIGGER_TYPE_INSTEAD)
+#define TRIGGER_TYPE_AFTER				0
+
+#define TRIGGER_TYPE_EVENT_MASK \
+	(TRIGGER_TYPE_INSERT | TRIGGER_TYPE_DELETE | TRIGGER_TYPE_UPDATE | TRIGGER_TYPE_TRUNCATE)
+
+/* Macros for manipulating tgtype */
+#define TRIGGER_CLEAR_TYPE(type)		((type) = 0)
+
+#define TRIGGER_SETT_ROW(type)			((type) |= TRIGGER_TYPE_ROW)
+#define TRIGGER_SETT_STATEMENT(type)	((type) |= TRIGGER_TYPE_STATEMENT)
+#define TRIGGER_SETT_BEFORE(type)		((type) |= TRIGGER_TYPE_BEFORE)
+#define TRIGGER_SETT_AFTER(type)		((type) |= TRIGGER_TYPE_AFTER)
+#define TRIGGER_SETT_INSTEAD(type)		((type) |= TRIGGER_TYPE_INSTEAD)
+#define TRIGGER_SETT_INSERT(type)		((type) |= TRIGGER_TYPE_INSERT)
+#define TRIGGER_SETT_DELETE(type)		((type) |= TRIGGER_TYPE_DELETE)
+#define TRIGGER_SETT_UPDATE(type)		((type) |= TRIGGER_TYPE_UPDATE)
+#define TRIGGER_SETT_TRUNCATE(type)		((type) |= TRIGGER_TYPE_TRUNCATE)
+
+#define TRIGGER_FOR_ROW(type)			((type) & TRIGGER_TYPE_ROW)
+#define TRIGGER_FOR_BEFORE(type)		(((type) & TRIGGER_TYPE_TIMING_MASK) == TRIGGER_TYPE_BEFORE)
+#define TRIGGER_FOR_AFTER(type)			(((type) & TRIGGER_TYPE_TIMING_MASK) == TRIGGER_TYPE_AFTER)
+#define TRIGGER_FOR_INSTEAD(type)		(((type) & TRIGGER_TYPE_TIMING_MASK) == TRIGGER_TYPE_INSTEAD)
+#define TRIGGER_FOR_INSERT(type)		((type) & TRIGGER_TYPE_INSERT)
+#define TRIGGER_FOR_DELETE(type)		((type) & TRIGGER_TYPE_DELETE)
+#define TRIGGER_FOR_UPDATE(type)		((type) & TRIGGER_TYPE_UPDATE)
+#define TRIGGER_FOR_TRUNCATE(type)		((type) & TRIGGER_TYPE_TRUNCATE)
+
+/*
+ * Efficient macro for checking if tgtype matches a particular level
+ * (TRIGGER_TYPE_ROW or TRIGGER_TYPE_STATEMENT), timing (TRIGGER_TYPE_BEFORE,
+ * TRIGGER_TYPE_AFTER or TRIGGER_TYPE_INSTEAD), and event (TRIGGER_TYPE_INSERT,
+ * TRIGGER_TYPE_DELETE, TRIGGER_TYPE_UPDATE, or TRIGGER_TYPE_TRUNCATE).  Note
+ * that a tgtype can match more than one event, but only one level or timing.
+ */
+#define TRIGGER_TYPE_MATCHES(type, level, timing, event) \
+	(((type) & (TRIGGER_TYPE_LEVEL_MASK | TRIGGER_TYPE_TIMING_MASK | (event))) == ((level) | (timing) | (event)))
+
+#endif   /* PG_TRIGGER_H */