Update pg_freespacemap extension for parallel query.

All functions provided by this extension are PARALLEL SAFE.

Andreas Karlsson

contrib/pg_freespacemap/Makefile

@@ -4,7 +4,8 @@ MODULE_big = pg_freespacemap
 OBJS = pg_freespacemap.o $(WIN32RES)
 
 EXTENSION = pg_freespacemap
-DATA = pg_freespacemap--1.0.sql pg_freespacemap--unpackaged--1.0.sql
+DATA = pg_freespacemap--1.1.sql pg_freespacemap--1.0--1.1.sql \
+	pg_freespacemap--unpackaged--1.0.sql
 PGFILEDESC = "pg_freespacemap - monitoring of free space map"
 
 ifdef USE_PGXS

contrib/pg_freespacemap/pg_freespacemap--1.0--1.1.sql

+/* contrib/pg_freespacemap/pg_freespacemap--1.0--1.1.sql */
+
+-- complain if script is sourced in psql, rather than via ALTER EXTENSION
+\echo Use "ALTER EXTENSION pg_freespacemap UPDATE TO '1.1'" to load this file. \quit
+
+ALTER FUNCTION pg_freespace(regclass, bigint) PARALLEL SAFE;
+ALTER FUNCTION pg_freespace(regclass) PARALLEL SAFE;

contrib/pg_freespacemap/pg_freespacemap--1.0.sql → contrib/pg_freespacemap/pg_freespacemap--1.1.sql

-/* contrib/pg_freespacemap/pg_freespacemap--1.0.sql */
+/* contrib/pg_freespacemap/pg_freespacemap--1.1.sql */
 
 -- complain if script is sourced in psql, rather than via CREATE EXTENSION
 \echo Use "CREATE EXTENSION pg_freespacemap" to load this file. \quit
@@ -7,7 +7,7 @@
 CREATE FUNCTION pg_freespace(regclass, bigint)
 RETURNS int2
 AS 'MODULE_PATHNAME', 'pg_freespace'
-LANGUAGE C STRICT;
+LANGUAGE C STRICT PARALLEL SAFE;
 
 -- pg_freespace shows the recorded space avail at each block in a relation
 CREATE FUNCTION
@@ -17,7 +17,7 @@ AS $$
   SELECT blkno, pg_freespace($1, blkno) AS avail
   FROM generate_series(0, pg_relation_size($1) / current_setting('block_size')::bigint - 1) AS blkno;
 $$
-LANGUAGE SQL;
+LANGUAGE SQL PARALLEL SAFE;
 
 
 -- Don't want these to be available to public.

contrib/pg_freespacemap/pg_freespacemap.control

 # pg_freespacemap extension
 comment = 'examine the free space map (FSM)'
-default_version = '1.0'
+default_version = '1.1'
 module_pathname = '$libdir/pg_freespacemap'
 relocatable = true