Add pg_show_plans_q view

Same as pg_show_plans view but allows you to see the corresponding
query strings.

Makefile

@@ -4,7 +4,8 @@ OBJS = pg_show_plans.o
 EXTENSION = pg_show_plans
 DATA = pg_show_plans--1.0--1.1.sql \
        pg_show_plans--1.1--2.0.sql \
-       pg_show_plans--2.0.sql
+       pg_show_plans--2.0--2.1.sql \
+       pg_show_plans--2.1.sql
 REGRESS = pg_show_plans formats
 DOCS = pg_show_plans.md
 

pg_show_plans--2.0--2.1.sql

@@ -0,0 +1,8 @@
+-- Register a view to see query plans along with the corresponding queries.
+CREATE VIEW pg_show_plans_q AS
+	SELECT p.pid, p.level, p.plan, a.query
+	FROM pg_show_plans p
+	LEFT JOIN pg_stat_activity a
+	ON p.pid = a.pid AND p.level = 0 ORDER BY p.pid, p.level;
+
+GRANT SELECT ON pg_show_plans_q TO PUBLIC;

pg_show_plans--2.1.sql

@@ -0,0 +1,29 @@
+/* pg_show_plans/pg_show_plans--2.1.sql */
+
+-- complain if script is sourced in psql, rather than via CREATE EXTENSION
+\echo Use "CREATE EXTENSION pg_show_plans" to load this file. \quit
+
+CREATE FUNCTION pg_show_plans(
+	OUT pid int,
+	OUT level int,
+	OUT userid oid,
+	OUT dbid oid,
+	OUT plan text
+)
+RETURNS SETOF record
+AS 'MODULE_PATHNAME'
+LANGUAGE C;
+
+-- Register a view on the function for ease of use.
+CREATE VIEW pg_show_plans AS
+	SELECT * FROM pg_show_plans();
+
+-- Register a view to see query plans along with the corresponding queries.
+CREATE VIEW pg_show_plans_q AS
+	SELECT p.pid, p.level, p.plan, a.query
+	FROM pg_show_plans p
+	LEFT JOIN pg_stat_activity a
+	ON p.pid = a.pid AND p.level = 0 ORDER BY p.pid, p.level;
+
+GRANT SELECT ON pg_show_plans TO PUBLIC;
+GRANT SELECT ON pg_show_plans_q TO PUBLIC;

pg_show_plans.control

@@ -1,5 +1,5 @@
 # pg_show_plans extension
 comment = 'show query plans of all currently running SQL statements'
-default_version = '2.0'
+default_version = '2.1'
 module_pathname = '$libdir/pg_show_plans'
 relocatable = true