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-- complain if script is sourced in psql, rather than via CREATE EXTENSION
\echo Use "CREATE EXTENSION config_log" to load this file. \quit
CREATE TABLE pg_settings_log AS
SELECT name,
setting,
unit,
sourcefile,
sourceline,
CAST('INSERT' AS VARCHAR(6)) AS op,
CURRENT_TIMESTAMP AS recorded_ts
FROM pg_settings WHERE source='configuration file';
CREATE OR REPLACE VIEW pg_settings_log_current
AS SELECT psl.*
FROM pg_settings_log psl
LEFT JOIN pg_settings_log psl_ref
ON (psl.name = psl_ref.name
AND psl.recorded_ts < psl_ref.recorded_ts)
WHERE psl_ref.name IS NULL;
CREATE OR REPLACE FUNCTION pg_settings_logger()
RETURNS BOOLEAN
LANGUAGE plpgsql
AS $$
DECLARE
changed BOOLEAN := FALSE;
settings_rec RECORD;
BEGIN
FOR settings_rec IN
WITH pg_settings_log_current AS (
SELECT *
FROM pg_settings_log_current
ORDER BY name
)
SELECT 'UPDATE' AS op,
ps.name,
ps.setting,
ps.unit,
ps.sourcefile,
ps.sourceline
FROM pg_settings ps
INNER JOIN pg_settings_log_current psl ON (psl.name=ps.name AND psl.setting != ps.setting)
WHERE ps.source ='configuration file'
UNION
SELECT 'INSERT' AS op,
ps.name,
ps.setting,
ps.unit,
ps.sourcefile,
ps.sourceline
FROM pg_settings ps
WHERE ps.source ='configuration file'
AND NOT EXISTS (SELECT NULL
FROM pg_settings_log_current psl
WHERE psl.name = ps.name
)
UNION
SELECT 'DELETE' AS op,
psl.name,
psl.setting,
psl.unit,
psl.sourcefile,
psl.sourceline
FROM pg_settings_log_current psl
WHERE EXISTS (SELECT NULL
FROM pg_settings ps
WHERE ps.name = psl.name
AND ps.source ='default'
)
AND psl.op != 'DELETE'
LOOP
INSERT INTO pg_settings_log
(name,
setting,
unit,
sourcefile,
sourceline,
op,
recorded_ts
)
VALUES(settings_rec.name,
settings_rec.setting,
settings_rec.unit,
settings_rec.sourcefile,
settings_rec.sourceline,
settings_rec.op,
CURRENT_TIMESTAMP
);
changed = TRUE;
END LOOP;
RETURN changed;
END;
$$;
REVOKE ALL ON pg_settings_log FROM public;
REVOKE ALL ON pg_settings_log_current FROM public;
REVOKE ALL ON FUNCTION pg_settings_logger() FROM public;
You can’t perform that action at this time.