Update of contrib stuff from massimo.

contrib/miscutil/Makefile

@@ -0,0 +1,62 @@
+#-------------------------------------------------------------------------
+#
+# Makefile--
+#    Makefile for array iterator functions.
+#
+#-------------------------------------------------------------------------
+
+PGDIR = ../..
+SRCDIR = $(PGDIR)/src
+
+include $(SRCDIR)/Makefile.global
+
+INCLUDE_OPT =	-I ./ \
+		-I $(SRCDIR)/ \
+		-I $(SRCDIR)/include \
+		-I $(SRCDIR)/port/$(PORTNAME)
+
+CFLAGS += $(INCLUDE_OPT)
+
+ifeq ($(PORTNAME), linux)
+  ifdef LINUX_ELF
+    ifeq ($(CC), gcc)
+      CFLAGS += -fPIC
+    endif
+  endif
+endif
+
+ifeq ($(PORTNAME), i386_solaris)
+  CFLAGS+= -fPIC
+endif
+
+MODNAME =	misc_utils
+
+MODULE =	$(MODNAME)$(DLSUFFIX)
+
+all:		module sql
+
+module:		$(MODULE)
+
+sql:		$(MODNAME).sql
+
+install:	$(MODULE)
+		cp -p $(MODULE) $(LIBDIR)
+		cd $(LIBDIR); strip $(MODULE)
+
+%.sql: %.sql.in
+		sed "s|MODULE_PATHNAME|$(LIBDIR)/$(MODULE)|" < $< > $@
+
+.SUFFIXES: $(DLSUFFIX)
+
+%$(DLSUFFIX): %.c
+		cc $(CFLAGS) -shared -o $@ $<
+
+depend dep:
+		$(CC) -MM $(INCLUDE_OPT) *.c >depend
+
+clean:
+		rm -f $(MODULE) $(MODNAME).sql assert_test.so
+
+ifeq (depend,$(wildcard depend))
+include depend
+endif

contrib/miscutil/assert_test.c

@@ -0,0 +1,43 @@
+/*
+ * assert_test.c --
+ *
+ * This file tests Postgres assert checking.
+ *
+ * Copyright (c) 1996, Massimo Dal Zotto <dz@cs.unitn.it>
+ */
+
+#include "postgres.h"
+#include "assert_test.h"
+
+extern int assertTest(int val);
+extern int assertEnable(int val);
+
+int
+assert_enable(int val)
+{
+    return assertEnable(val);
+}
+
+int
+assert_test(int val)
+{
+    return assertTest(val);
+}
+
+/*
+
+-- Enable/disable Postgres assert checking.
+--
+create function assert_enable(int4) returns int4
+    as '/usr/local/pgsql/lib/assert_test.so'
+    language 'C';
+
+-- Test Postgres assert checking.
+--
+create function assert_test(int4) returns int4
+    as '/usr/local/pgsql/lib/assert_test.so'
+    language 'C';
+
+*/
+
+/* end of file */

contrib/miscutil/assert_test.h

@@ -0,0 +1,7 @@
+#ifndef ASSERT_TEST_H
+#define ASSERT_TEST_H
+
+int assert_enable(int val);
+int assert_test(int val);
+
+#endif

contrib/miscutil/misc_utils.c

@@ -0,0 +1,50 @@
+/*
+ * utils.c --
+ *
+ * This file defines various Postgres utility functions.
+ *
+ * Copyright (c) 1996, Massimo Dal Zotto <dz@cs.unitn.it>
+ */
+
+#include <unistd.h>
+
+#include "postgres.h"
+#include "utils/palloc.h"
+
+#include "misc_utils.h"
+
+extern int ExecutorLimit(int limit);
+extern void Async_Unlisten(char *relname, int pid);
+
+int
+query_limit(int limit)
+{
+    return ExecutorLimit(limit);
+}
+
+int
+backend_pid()
+{
+    return getpid();
+}
+
+int
+unlisten(char *relname)
+{
+    Async_Unlisten(relname, getpid());
+    return 0;
+}
+
+int
+max(int x, int y)
+{
+    return ((x > y) ? x : y);
+}
+
+int
+min(int x, int y)
+{
+    return ((x < y) ? x : y);
+}
+
+/* end of file */

contrib/miscutil/misc_utils.h

@@ -0,0 +1,10 @@
+#ifndef MISC_UTILS_H
+#define MISC_UTILS_H
+
+int query_limit(int limit);
+int backend_pid(void);
+int unlisten(char *relname);
+int max(int x, int y);
+int min(int x, int y);
+
+#endif

contrib/miscutil/misc_utils.sql.in

@@ -0,0 +1,40 @@
+-- SQL code to define the new array iterator functions and operators
+
+-- min(x,y)
+--
+create function min(int4,int4) returns int4
+  as 'MODULE_PATHNAME'
+  language 'C';
+
+-- max(x,y)
+--
+create function max(int4,int4) returns int4
+  as 'MODULE_PATHNAME'
+  language 'C';
+
+-- Set the maximum number of tuples returned by a single query
+--
+create function query_limit(int4) returns int4
+  as 'MODULE_PATHNAME'
+  language 'C';
+
+-- Return the pid of the backend
+--
+create function backend_pid() returns int4
+  as 'MODULE_PATHNAME'
+  language 'C';
+
+-- Unlisten from a relation
+--
+create function unlisten(name) returns int4
+  as 'MODULE_PATHNAME'
+  language 'C';
+
+-- Unlisten from all relations for this backend
+--
+create function unlisten() returns int4
+  as 'delete from pg_listener where listenerpid = backend_pid();
+      select 0'
+  language 'sql';
+
+-- end of file