Initial commit

sql_utils/Makefile

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+#
+# Makefile
+# Copyright (c) 2ndQuadrant, 2010
+#
+
+MODULE_big = repmgr_wrapper_funcs
+DATA_built=repmgr_wrapper_funcs.sql
+DATA=uninstall_repmgr_wrapper_funcs.sql
+OBJS=repmgr_wrapper_funcs.o
+
+ifdef USE_PGXS
+PGXS := $(shell pg_config --pgxs)
+include $(PGXS)
+else
+subdir = contrib/repmgr/sql_utils
+top_builddir = ../../..
+include $(top_builddir)/src/Makefile.global
+include $(top_srcdir)/contrib/contrib-global.mk
+endif

sql_utils/repmgr_wrapper_funcs.c

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+/*
+ * repmgr_wrapper_funcs.c
+ * Copyright (c) 2ndQuadrant, 2010
+ *
+ * Expose some backend functions in SQL
+ */
+
+#include "postgres.h"
+#include "fmgr.h"
+#include "access/xlog.h"
+#include "storage/procarray.h"
+
+PG_MODULE_MAGIC;
+
+Datum last_xlog_replay_timestamp(PG_FUNCTION_ARGS);
+Datum oldest_xmin(PG_FUNCTION_ARGS);
+
+PG_FUNCTION_INFO_V1(last_xlog_replay_timestamp);
+
+Datum
+last_xlog_replay_timestamp(PG_FUNCTION_ARGS)
+{
+	if (!InRecovery)
+		PG_RETURN_NULL();
+	else
+	    PG_RETURN_TIMESTAMPTZ(GetLatestXLogTime());
+}
+
+
+PG_FUNCTION_INFO_V1(oldest_xmin);
+
+Datum
+oldest_xmin(PG_FUNCTION_ARGS)
+{
+	    PG_RETURN_INT64(GetOldestXmin(false, false));
+}

sql_utils/repmgr_wrapper_funcs.sql.in

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+/*
+ * repmgr_wrapper_function.sql
+ * Copyright (c) 2ndQuadrant, 2010
+ *
+ */
+
+CREATE FUNCTION get_last_xlog_replay_timestamp() RETURNS timestamp with time zone 
+AS 'MODULE_PATHNAME', 'last_xlog_replay_timestamp' 
+LANGUAGE C STRICT;
+
+CREATE FUNCTION get_oldest_xmin() RETURNS bigint
+AS 'MODULE_PATHNAME', 'oldest_xmin'
+LANGUAGE C STRICT;

sql_utils/uninstall_repmgr_wrapper_funcs.sql

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+DROP FUNCTION get_last_xlog_replay_timestamp();
+DROP FUNCTION get_oldest_xmin();