Added utils/adt/ri_triggers with empty shells for the

FOREIGN KEY triggers.

Added pg_proc entries for all the new functions.

Jan

src/backend/commands/trigger.c

@@ -155,7 +155,8 @@ CreateTrigger(CreateTrigStmt *stmt)
 	if (((Form_pg_proc) GETSTRUCT(tuple))->prorettype != 0)
 		elog(ERROR, "CreateTrigger: function %s() must return OPAQUE",
 			 stmt->funcname);
-	if (((Form_pg_proc) GETSTRUCT(tuple))->prolang != ClanguageId)
+	if (((Form_pg_proc) GETSTRUCT(tuple))->prolang != ClanguageId &&
+		((Form_pg_proc) GETSTRUCT(tuple))->prolang != INTERNALlanguageId)
 	{
 		HeapTuple	langTup;
 
@@ -166,7 +167,7 @@ CreateTrigger(CreateTrigStmt *stmt)
 			elog(ERROR, "CreateTrigger: cache lookup for PL failed");
 
 		if (((Form_pg_language) GETSTRUCT(langTup))->lanispl == false)
-			elog(ERROR, "CreateTrigger: only C and PL functions are supported");
+			elog(ERROR, "CreateTrigger: only builtin, C and PL functions are supported");
 	}
 
 	MemSet(nulls, ' ', Natts_pg_trigger * sizeof(char));

src/backend/utils/adt/Makefile

@@ -4,7 +4,7 @@
 #    Makefile for utils/adt
 #
 # IDENTIFICATION
-#    $Header: /cvsroot/pgsql/src/backend/utils/adt/Makefile,v 1.25 1999/07/22 18:30:08 momjian Exp $
+#    $Header: /cvsroot/pgsql/src/backend/utils/adt/Makefile,v 1.26 1999/09/30 14:54:22 wieck Exp $
 #
 #-------------------------------------------------------------------------
 
@@ -34,7 +34,8 @@ OBJS = acl.o arrayfuncs.o arrayutils.o bool.o cash.o char.o chunk.o \
 	oid.o oracle_compat.o \
 	regexp.o regproc.o ruleutils.o selfuncs.o sets.o \
 	tid.o timestamp.o varchar.o varlena.o version.o \
-	network.o mac.o inet_net_ntop.o inet_net_pton.o
+	network.o mac.o inet_net_ntop.o inet_net_pton.o \
+	ri_triggers.o
 
 all: SUBSYS.o
 

src/backend/utils/adt/ri_triggers.c

@@ -0,0 +1,184 @@
+/* ----------
+ * ri_triggers.c
+ *
+ *	Generic trigger procedures for referential integrity constraint
+ *	checks.
+ *
+ *	1999 Jan Wieck
+ *
+ * $Header: /cvsroot/pgsql/src/backend/utils/adt/ri_triggers.c,v 1.1 1999/09/30 14:54:22 wieck Exp $
+ *
+ * ----------
+ */
+
+#include "postgres.h"
+#include "fmgr.h"
+
+#include "access/heapam.h"
+#include "catalog/pg_proc.h"
+#include "catalog/pg_type.h"
+#include "commands/trigger.h"
+#include "executor/spi.h"
+#include "utils/builtins.h"
+#include "utils/syscache.h"
+
+/* ----------
+ * RI_FKey_check_ins -
+ *
+ *	Check foreign key existance at insert event on FK table.
+ * ----------
+ */
+HeapTuple
+RI_FKey_check_ins (FmgrInfo *proinfo)
+{
+	CurrentTriggerData	= NULL;
+
+	elog(NOTICE, "RI_FKey_check_ins() called\n");
+	return NULL;
+}
+
+
+/* ----------
+ * RI_FKey_check_upd -
+ *
+ *	Check foreign key existance at update event on FK table.
+ * ----------
+ */
+HeapTuple
+RI_FKey_check_upd (FmgrInfo *proinfo)
+{
+	CurrentTriggerData	= NULL;
+
+	elog(NOTICE, "RI_FKey_check_upd() called\n");
+	return NULL;
+}
+
+
+/* ----------
+ * RI_FKey_cascade_del -
+ *
+ *	Cascaded delete foreign key references at delete event on PK table.
+ * ----------
+ */
+HeapTuple
+RI_FKey_cascade_del (FmgrInfo *proinfo)
+{
+	CurrentTriggerData	= NULL;
+
+	elog(NOTICE, "RI_FKey_cascade_del() called\n");
+	return NULL;
+}
+
+
+/* ----------
+ * RI_FKey_cascade_upd -
+ *
+ *	Cascaded update/delete foreign key references at update event on PK table.
+ * ----------
+ */
+HeapTuple
+RI_FKey_cascade_upd (FmgrInfo *proinfo)
+{
+	CurrentTriggerData	= NULL;
+
+	elog(NOTICE, "RI_FKey_cascade_upd() called\n");
+	return NULL;
+}
+
+
+/* ----------
+ * RI_FKey_restrict_del -
+ *
+ *	Restrict delete from PK table to rows unreferenced by foreign key.
+ * ----------
+ */
+HeapTuple
+RI_FKey_restrict_del (FmgrInfo *proinfo)
+{
+	CurrentTriggerData	= NULL;
+
+	elog(NOTICE, "RI_FKey_restrict_del() called\n");
+	return NULL;
+}
+
+
+/* ----------
+ * RI_FKey_restrict_upd -
+ *
+ *	Restrict update of PK to rows unreferenced by foreign key.
+ * ----------
+ */
+HeapTuple
+RI_FKey_restrict_upd (FmgrInfo *proinfo)
+{
+	CurrentTriggerData	= NULL;
+
+	elog(NOTICE, "RI_FKey_restrict_upd() called\n");
+	return NULL;
+}
+
+
+/* ----------
+ * RI_FKey_setnull_del -
+ *
+ *	Set foreign key references to NULL values at delete event on PK table.
+ * ----------
+ */
+HeapTuple
+RI_FKey_setnull_del (FmgrInfo *proinfo)
+{
+	CurrentTriggerData	= NULL;
+
+	elog(NOTICE, "RI_FKey_setnull_del() called\n");
+	return NULL;
+}
+
+
+/* ----------
+ * RI_FKey_setnull_upd -
+ *
+ *	Set foreign key references to NULL at update event on PK table.
+ * ----------
+ */
+HeapTuple
+RI_FKey_setnull_upd (FmgrInfo *proinfo)
+{
+	CurrentTriggerData	= NULL;
+
+	elog(NOTICE, "RI_FKey_setnull_upd() called\n");
+	return NULL;
+}
+
+
+/* ----------
+ * RI_FKey_setdefault_del -
+ *
+ *	Set foreign key references to defaults at delete event on PK table.
+ * ----------
+ */
+HeapTuple
+RI_FKey_setdefault_del (FmgrInfo *proinfo)
+{
+	CurrentTriggerData	= NULL;
+
+	elog(NOTICE, "RI_FKey_setdefault_del() called\n");
+	return NULL;
+}
+
+
+/* ----------
+ * RI_FKey_setdefault_upd -
+ *
+ *	Set foreign key references to defaults at update event on PK table.
+ * ----------
+ */
+HeapTuple
+RI_FKey_setdefault_upd (FmgrInfo *proinfo)
+{
+	CurrentTriggerData	= NULL;
+
+	elog(NOTICE, "RI_FKey_setdefault_upd() called\n");
+	return NULL;
+}
+
+

src/include/catalog/pg_proc.h

@@ -6,7 +6,7 @@
  *
  * Copyright (c) 1994, Regents of the University of California
  *
- * $Id: pg_proc.h,v 1.103 1999/09/29 21:13:30 wieck Exp $
+ * $Id: pg_proc.h,v 1.104 1999/09/30 14:54:23 wieck Exp $
  *
  * NOTES
  *	  The script catalog/genbki.sh reads this file and generates .bki
@@ -2112,6 +2112,28 @@ DESCR("user name by UID (with fallback)");
 DATA(insert OID = 1643 (  pg_get_indexdef	   PGUID 11 f t f 1 f 25 "26" 100 0 0 100  pg_get_indexdef - ));
 DESCR("index description");
 
+/* Generic referential integrity constraint triggers */
+DATA(insert OID = 1644 (  RI_FKey_check_ins	    PGUID 11 f t f 0 f 0 "" 100 0 0 100  RI_FKey_check_ins - ));
+DESCR("referential integrity FOREIGN KEY ... REFERENCES");
+DATA(insert OID = 1645 (  RI_FKey_check_upd	    PGUID 11 f t f 0 f 0 "" 100 0 0 100  RI_FKey_check_upd - ));
+DESCR("referential integrity FOREIGN KEY ... REFERENCES");
+DATA(insert OID = 1646 (  RI_FKey_cascade_del   PGUID 11 f t f 0 f 0 "" 100 0 0 100  RI_FKey_cascade_del - ));
+DESCR("referential integrity ON DELETE CASCADE");
+DATA(insert OID = 1647 (  RI_FKey_cascade_upd   PGUID 11 f t f 0 f 0 "" 100 0 0 100  RI_FKey_cascade_upd - ));
+DESCR("referential integrity ON UPDATE CASCADE");
+DATA(insert OID = 1648 (  RI_FKey_restrict_del  PGUID 11 f t f 0 f 0 "" 100 0 0 100  RI_FKey_restrict_del - ));
+DESCR("referential integrity ON DELETE RESTRICT");
+DATA(insert OID = 1649 (  RI_FKey_restrict_upd	PGUID 11 f t f 0 f 0 "" 100 0 0 100  RI_FKey_restrict_upd - ));
+DESCR("referential integrity ON UPDATE RESTRICT");
+DATA(insert OID = 1650 (  RI_FKey_setnull_del	PGUID 11 f t f 0 f 0 "" 100 0 0 100  RI_FKey_setnull_del - ));
+DESCR("referential integrity ON DELETE SET NULL");
+DATA(insert OID = 1651 (  RI_FKey_setnull_upd	PGUID 11 f t f 0 f 0 "" 100 0 0 100  RI_FKey_setnull_upd - ));
+DESCR("referential integrity ON UPDATE SET NULL");
+DATA(insert OID = 1652 (  RI_FKey_setdefault_del PGUID 11 f t f 0 f 0 "" 100 0 0 100  RI_FKey_setdefault_del - ));
+DESCR("referential integrity ON DELETE SET DEFAULT");
+DATA(insert OID = 1653 (  RI_FKey_setdefault_upd PGUID 11 f t f 0 f 0 "" 100 0 0 100  RI_FKey_setdefault_upd - ));
+DESCR("referential integrity ON UPDATE SET DEFAULT");
+
 /* for mac type support */
 DATA(insert OID = 436 (  macaddr_in			PGUID 11 f t t 1 f 829 "0" 100 0 0 100	macaddr_in - ));
 DESCR("(internal)");

src/include/utils/builtins.h

@@ -6,7 +6,7 @@
  *
  * Copyright (c) 1994, Regents of the University of California
  *
- * $Id: builtins.h,v 1.86 1999/09/29 21:13:31 wieck Exp $
+ * $Id: builtins.h,v 1.87 1999/09/30 14:54:24 wieck Exp $
  *
  * NOTES
  *	  This should normally only be included by fmgr.h.
@@ -30,6 +30,7 @@
 #include "utils/int8.h"
 #include "utils/nabstime.h"
 #include "utils/numeric.h"
+#include "access/heapam.h"		/* for HeapTuple */
 
 /*
  *		Defined in adt/
@@ -600,5 +601,16 @@ float32		numeric_float4(Numeric num);
 Numeric		float8_numeric(float64 val);
 float64		numeric_float8(Numeric num);
 
+/* ri_triggers.c */
+HeapTuple	RI_FKey_check_ins(FmgrInfo *proinfo);
+HeapTuple	RI_FKey_check_upd(FmgrInfo *proinfo);
+HeapTuple	RI_FKey_cascade_del(FmgrInfo *proinfo);
+HeapTuple	RI_FKey_cascade_upd(FmgrInfo *proinfo);
+HeapTuple	RI_FKey_restrict_del(FmgrInfo *proinfo);
+HeapTuple	RI_FKey_restrict_upd(FmgrInfo *proinfo);
+HeapTuple	RI_FKey_setnull_del(FmgrInfo *proinfo);
+HeapTuple	RI_FKey_setnull_upd(FmgrInfo *proinfo);
+HeapTuple	RI_FKey_setdefault_del(FmgrInfo *proinfo);
+HeapTuple	RI_FKey_setdefault_upd(FmgrInfo *proinfo);
 
 #endif	 /* BUILTINS_H */