Adding upstream version 15.4.upstream/15.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 75 insertions, 0 deletions

diff --git a/contrib/pg_visibility/pg_visibility--1.1.sql b/contrib/pg_visibility/pg_visibility--1.1.sql
new file mode 100644
index 0000000..0a29967
--- /dev/null
+++ b/contrib/pg_visibility/pg_visibility--1.1.sql
@@ -0,0 +1,75 @@
+/* contrib/pg_visibility/pg_visibility--1.1.sql */
+
+-- complain if script is sourced in psql, rather than via CREATE EXTENSION
+\echo Use "CREATE EXTENSION pg_visibility" to load this file. \quit
+
+-- Show visibility map information.
+CREATE FUNCTION pg_visibility_map(regclass, blkno bigint,
+								  all_visible OUT boolean,
+								  all_frozen OUT boolean)
+RETURNS record
+AS 'MODULE_PATHNAME', 'pg_visibility_map'
+LANGUAGE C STRICT;
+
+-- Show visibility map and page-level visibility information.
+CREATE FUNCTION pg_visibility(regclass, blkno bigint,
+							  all_visible OUT boolean,
+							  all_frozen OUT boolean,
+							  pd_all_visible OUT boolean)
+RETURNS record
+AS 'MODULE_PATHNAME', 'pg_visibility'
+LANGUAGE C STRICT;
+
+-- Show visibility map information for each block in a relation.
+CREATE FUNCTION pg_visibility_map(regclass, blkno OUT bigint,
+								  all_visible OUT boolean,
+								  all_frozen OUT boolean)
+RETURNS SETOF record
+AS 'MODULE_PATHNAME', 'pg_visibility_map_rel'
+LANGUAGE C STRICT;
+
+-- Show visibility map and page-level visibility information for each block.
+CREATE FUNCTION pg_visibility(regclass, blkno OUT bigint,
+							  all_visible OUT boolean,
+							  all_frozen OUT boolean,
+							  pd_all_visible OUT boolean)
+RETURNS SETOF record
+AS 'MODULE_PATHNAME', 'pg_visibility_rel'
+LANGUAGE C STRICT;
+
+-- Show summary of visibility map bits for a relation.
+CREATE FUNCTION pg_visibility_map_summary(regclass,
+    OUT all_visible bigint, OUT all_frozen bigint)
+RETURNS record
+AS 'MODULE_PATHNAME', 'pg_visibility_map_summary'
+LANGUAGE C STRICT;
+
+-- Show tupleids of non-frozen tuples if any in all_frozen pages
+-- for a relation.
+CREATE FUNCTION pg_check_frozen(regclass, t_ctid OUT tid)
+RETURNS SETOF tid
+AS 'MODULE_PATHNAME', 'pg_check_frozen'
+LANGUAGE C STRICT;
+
+-- Show tupleids of dead tuples if any in all_visible pages for a relation.
+CREATE FUNCTION pg_check_visible(regclass, t_ctid OUT tid)
+RETURNS SETOF tid
+AS 'MODULE_PATHNAME', 'pg_check_visible'
+LANGUAGE C STRICT;
+
+-- Truncate the visibility map fork.
+CREATE FUNCTION pg_truncate_visibility_map(regclass)
+RETURNS void
+AS 'MODULE_PATHNAME', 'pg_truncate_visibility_map'
+LANGUAGE C STRICT
+PARALLEL UNSAFE;  -- let's not make this any more dangerous
+
+-- Don't want these to be available to public.
+REVOKE ALL ON FUNCTION pg_visibility_map(regclass, bigint) FROM PUBLIC;
+REVOKE ALL ON FUNCTION pg_visibility(regclass, bigint) FROM PUBLIC;
+REVOKE ALL ON FUNCTION pg_visibility_map(regclass) FROM PUBLIC;
+REVOKE ALL ON FUNCTION pg_visibility(regclass) FROM PUBLIC;
+REVOKE ALL ON FUNCTION pg_visibility_map_summary(regclass) FROM PUBLIC;
+REVOKE ALL ON FUNCTION pg_check_frozen(regclass) FROM PUBLIC;
+REVOKE ALL ON FUNCTION pg_check_visible(regclass) FROM PUBLIC;
+REVOKE ALL ON FUNCTION pg_truncate_visibility_map(regclass) FROM PUBLIC;