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This module provides SQL functions that allow to inspect logical decoding components. It currently allows to inspect the contents of serialized logical snapshots of a running database cluster, which is useful for debugging or educational purposes. Author: Bertrand Drouvot Reviewed-by: Amit Kapila, Shveta Malik, Peter Smith, Peter Eisentraut Reviewed-by: David G. Johnston Discussion: https://postgr.es/m/ZscuZ92uGh3wm4tW%40ip-10-97-1-34.eu-west-3.compute.internal
44 lines
1.4 KiB
SQL
44 lines
1.4 KiB
SQL
/* contrib/pg_logicalinspect/pg_logicalinspect--1.0.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_logicalinspect" to load this file. \quit
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--
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-- pg_get_logical_snapshot_meta()
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--
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CREATE FUNCTION pg_get_logical_snapshot_meta(IN filename text,
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OUT magic int4,
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OUT checksum int8,
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OUT version int4
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)
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AS 'MODULE_PATHNAME', 'pg_get_logical_snapshot_meta'
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LANGUAGE C STRICT PARALLEL SAFE;
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REVOKE EXECUTE ON FUNCTION pg_get_logical_snapshot_meta(text) FROM PUBLIC;
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GRANT EXECUTE ON FUNCTION pg_get_logical_snapshot_meta(text) TO pg_read_server_files;
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--
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-- pg_get_logical_snapshot_info()
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--
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CREATE FUNCTION pg_get_logical_snapshot_info(IN filename text,
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OUT state text,
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OUT xmin xid,
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OUT xmax xid,
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OUT start_decoding_at pg_lsn,
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OUT two_phase_at pg_lsn,
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OUT initial_xmin_horizon xid,
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OUT building_full_snapshot boolean,
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OUT in_slot_creation boolean,
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OUT last_serialized_snapshot pg_lsn,
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OUT next_phase_at xid,
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OUT committed_count int4,
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OUT committed_xip xid[],
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OUT catchange_count int4,
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OUT catchange_xip xid[]
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)
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AS 'MODULE_PATHNAME', 'pg_get_logical_snapshot_info'
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LANGUAGE C STRICT PARALLEL SAFE;
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REVOKE EXECUTE ON FUNCTION pg_get_logical_snapshot_info(text) FROM PUBLIC;
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GRANT EXECUTE ON FUNCTION pg_get_logical_snapshot_info(text) TO pg_read_server_files;
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