0003-session_hooks_tests-v3.patch

diff --git a/src/test/modules/Makefile b/src/test/modules/Makefile
index b7ed0af..a3c8c1e 100644
--- a/src/test/modules/Makefile
+++ b/src/test/modules/Makefile
@@ -11,6 +11,7 @@ SUBDIRS = \
 		  snapshot_too_old \
 		  test_ddl_deparse \
 		  test_extensions \
+		  test_session_hooks \
 		  test_parser \
 		  test_pg_dump \
 		  test_rbtree \
diff --git a/src/test/modules/test_session_hooks/.gitignore b/src/test/modules/test_session_hooks/.gitignore
new file mode 100644
index 0000000..5dcb3ff
--- /dev/null
+++ b/src/test/modules/test_session_hooks/.gitignore
@@ -0,0 +1,4 @@
+# Generated subdirectories
+/log/
+/results/
+/tmp_check/
diff --git a/src/test/modules/test_session_hooks/Makefile b/src/test/modules/test_session_hooks/Makefile
new file mode 100644
index 0000000..9cabd3f
--- /dev/null
+++ b/src/test/modules/test_session_hooks/Makefile
@@ -0,0 +1,26 @@
+# src/test/modules/test_session_hooks/Makefile
+
+MODULES = test_session_hooks
+PGFILEDESC = "test_session_hooks - Test session hooks with an extension"
+
+EXTENSION = test_session_hooks
+DATA = test_session_hooks--1.0.sql
+
+REGRESS = test_session_hooks
+REGRESS_OPTS = --temp-config=$(top_srcdir)/src/test/modules/test_session_hooks/session_hooks.conf
+
+ifdef USE_PGXS
+PG_CONFIG = pg_config
+PGXS := $(shell $(PG_CONFIG) --pgxs)
+include $(PGXS)
+else
+subdir = src/test/modules/test_session_hooks
+top_builddir = ../../../..
+include $(top_builddir)/src/Makefile.global
+include $(top_srcdir)/contrib/contrib-global.mk
+endif
+
+check: prove-check
+
+prove-check:
+	$(prove_check)
diff --git a/src/test/modules/test_session_hooks/README b/src/test/modules/test_session_hooks/README
new file mode 100644
index 0000000..e6c78b8
--- /dev/null
+++ b/src/test/modules/test_session_hooks/README
@@ -0,0 +1,2 @@
+test_pg_dump is an extension explicitly to test pg_dump when
+extensions are present in the system.
diff --git a/src/test/modules/test_session_hooks/expected/test_session_hooks.out b/src/test/modules/test_session_hooks/expected/test_session_hooks.out
new file mode 100644
index 0000000..602819c
--- /dev/null
+++ b/src/test/modules/test_session_hooks/expected/test_session_hooks.out
@@ -0,0 +1,10 @@
+SHOW test_session_hooks.message;
+ERROR:  unrecognized configuration parameter "test_session_hooks.message"
+CREATE DATABASE test;
+\c test
+SHOW test_session_hooks.message;
+ test_session_hooks.message 
+----------------------------
+ Session Start Hook Handled
+(1 row)
+
diff --git a/src/test/modules/test_session_hooks/session_hooks.conf b/src/test/modules/test_session_hooks/session_hooks.conf
new file mode 100644
index 0000000..a66e60e
--- /dev/null
+++ b/src/test/modules/test_session_hooks/session_hooks.conf
@@ -0,0 +1 @@
+shared_preload_libraries = 'test_session_hooks'
diff --git a/src/test/modules/test_session_hooks/sql/test_session_hooks.sql b/src/test/modules/test_session_hooks/sql/test_session_hooks.sql
new file mode 100644
index 0000000..b75f2f8
--- /dev/null
+++ b/src/test/modules/test_session_hooks/sql/test_session_hooks.sql
@@ -0,0 +1,4 @@
+SHOW test_session_hooks.message;
+CREATE DATABASE test;
+\c test
+SHOW test_session_hooks.message;
diff --git a/src/test/modules/test_session_hooks/t/001_base.pl b/src/test/modules/test_session_hooks/t/001_base.pl
new file mode 100644
index 0000000..442fb8a
--- /dev/null
+++ b/src/test/modules/test_session_hooks/t/001_base.pl
@@ -0,0 +1,24 @@
+# Test session end hook log messages
+
+use strict;
+use warnings;
+
+use TestLib;
+use Test::More tests => 2;
+use PostgresNode;
+
+my $node = get_new_node('main');
+$node->init;
+$node->append_conf(
+	'postgresql.conf',
+	qq{shared_preload_libraries = 'test_session_hooks'}
+);
+$node->start;
+$node->safe_psql('postgres', 'CREATE DATABASE test');
+my ($ret, $stdout, $stderr) = $node->psql('test','show test_session_hooks.message');
+
+# check session start hook
+like($stdout, qr/Session Start Hook Handled/, 'error during session start hook');
+
+# check session end hook
+like(slurp_file($node->logfile()), qr/Session End Hook Handled/, 'error during session end hook');
diff --git a/src/test/modules/test_session_hooks/test_session_hooks--1.0.sql b/src/test/modules/test_session_hooks/test_session_hooks--1.0.sql
new file mode 100644
index 0000000..16bcee9
--- /dev/null
+++ b/src/test/modules/test_session_hooks/test_session_hooks--1.0.sql
@@ -0,0 +1,4 @@
+/* src/test/modules/test_hook_session/test_hook_session--1.0.sql */
+
+-- complain if script is sourced in psql, rather than via CREATE EXTENSION
+\echo Use "CREATE EXTENSION test_hook_session" to load this file. \quit
diff --git a/src/test/modules/test_session_hooks/test_session_hooks.c b/src/test/modules/test_session_hooks/test_session_hooks.c
new file mode 100644
index 0000000..ff63b83
--- /dev/null
+++ b/src/test/modules/test_session_hooks/test_session_hooks.c
@@ -0,0 +1,80 @@
+/* -------------------------------------------------------------------------
+ *
+ * test_session_hooks.c
+ * 		Code for testing SESSION hooks.
+ *
+ * Copyright (c) 2010-2017, PostgreSQL Global Development Group
+ *
+ * IDENTIFICATION
+ *		src/test/modules/test_session_hooks/test_session_hooks.c
+ *
+ * -------------------------------------------------------------------------
+ */
+#include "postgres.h"
+
+#include "access/xact.h"
+#include "executor/spi.h"
+#include "tcop/tcopprot.h"
+
+PG_MODULE_MAGIC;
+
+void		_PG_init(void);
+void		_PG_fini(void);
+
+/* Original Hook */
+static session_start_hook_type prev_session_start_hook = NULL;
+static session_end_hook_type prev_session_end_hook = NULL;
+
+/* sample session start hook function */
+static void
+sample_session_start_hook(const char *dbname, const char *username)
+{
+	if (prev_session_start_hook)
+		prev_session_start_hook(dbname, username);
+
+	if (!strcmp(dbname, "test"))
+	{
+		StartTransactionCommand();
+		SPI_connect();
+		SPI_exec("SET test_session_hooks.message TO 'Session Start Hook Handled'", 1);
+		SPI_finish();
+		CommitTransactionCommand();
+	}
+}
+
+/* sample sessoin end hook function */
+static void
+sample_session_end_hook(const char *dbname, const char *username)
+{
+	if (prev_session_end_hook)
+		prev_session_end_hook(dbname, username);
+
+	if (!strcmp(dbname, "test"))
+		elog(LOG, "Session End Hook Handled");
+}
+
+/*
+ * Module Load Callback
+ */
+void
+_PG_init(void)
+{
+	/* Save Hooks for Unload */
+	prev_session_start_hook = session_start_hook;
+	prev_session_end_hook = session_end_hook;
+
+	/* Set New Hooks */
+	session_start_hook = sample_session_start_hook;
+	session_end_hook = sample_session_end_hook;
+}
+
+/*
+ * Module Unload Callback
+ */
+void
+_PG_fini(void)
+{
+	/* Uninstall Hooks */
+	session_start_hook = prev_session_start_hook;
+	session_end_hook = prev_session_end_hook;
+}
diff --git a/src/test/modules/test_session_hooks/test_session_hooks.control b/src/test/modules/test_session_hooks/test_session_hooks.control
new file mode 100644
index 0000000..7d7ef9f
--- /dev/null
+++ b/src/test/modules/test_session_hooks/test_session_hooks.control
@@ -0,0 +1,3 @@
+comment = 'Test start/end hook session with an extension'
+default_version = '1.0'
+relocatable = true