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