General trigger functions for referential integrity.

contrib/spi/Makefile

+
+SRCDIR= /home/postgres/current/pgsql/src
+
+include $(SRCDIR)/Makefile.global
+
+CFLAGS+= $(CFLAGS_SL) -I$(SRCDIR)/include -DREFINT_QUIET
+
+TARGETS= refint$(DLSUFFIX) refint.sql
+
+CLEANFILES+= $(TARGETS)
+
+all:: $(TARGETS)
+
+%.sql: %.source
+	rm -f $@; \
+	C=`pwd`; \
+	sed -e "s:_OBJWD_:$$C:g" \
+	    -e "s:_DLSUFFIX_:$(DLSUFFIX):g" < $< > $@
+
+clean: 
+	rm -f $(TARGETS)

contrib/spi/refint.source

+DROP FUNCTION check_primary_key ();
+DROP FUNCTION check_foreign_key ();
+
+CREATE FUNCTION check_primary_key ()
+	RETURNS opaque
+	AS '_OBJWD_/refint_DLSUFFIX_'
+	LANGUAGE 'c'
+;
+
+CREATE FUNCTION check_foreign_key ()
+	RETURNS opaque
+	AS '_OBJWD_/refint_DLSUFFIX_'
+	LANGUAGE 'c'
+;