25 lines
899 B
PL/PgSQL
25 lines
899 B
PL/PgSQL
/* contrib/pg_freespacemap/pg_freespacemap--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_freespacemap" to load this file. \quit
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-- Register the C function.
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CREATE FUNCTION pg_freespace(regclass, bigint)
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RETURNS int2
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AS 'MODULE_PATHNAME', 'pg_freespace'
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LANGUAGE C STRICT PARALLEL SAFE;
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-- pg_freespace shows the recorded space avail at each block in a relation
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CREATE FUNCTION
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pg_freespace(rel regclass, blkno OUT bigint, avail OUT int2)
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RETURNS SETOF RECORD
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AS $$
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SELECT blkno, pg_freespace($1, blkno) AS avail
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FROM generate_series(0, pg_relation_size($1) / current_setting('block_size')::bigint - 1) AS blkno;
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$$
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LANGUAGE SQL PARALLEL SAFE;
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-- Don't want these to be available to public.
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REVOKE ALL ON FUNCTION pg_freespace(regclass, bigint) FROM PUBLIC;
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REVOKE ALL ON FUNCTION pg_freespace(regclass) FROM PUBLIC;
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