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VACUUM;
--
-- sanity check, if we don't have indices the test will take years to
-- complete. But skip TOAST relations (since they will have varying
-- names depending on the current OID counter) as well as temp tables
-- of other backends (to avoid timing-dependent behavior).
--
SELECT relname, relhasindex
FROM pg_class c LEFT JOIN pg_namespace n ON n.oid = relnamespace
WHERE relkind = 'r' AND (nspname ~ '^pg_temp_') IS NOT TRUE
ORDER BY relname;
--
-- another sanity check: every system catalog that has OIDs should have
-- a unique index on OID. This ensures that the OIDs will be unique,
-- even after the OID counter wraps around.
-- We exclude non-system tables from the check by looking at nspname.
--
SELECT relname, nspname
FROM pg_class c LEFT JOIN pg_namespace n ON n.oid = relnamespace
WHERE relhasoids
AND ((nspname ~ '^pg_') IS NOT FALSE)
AND NOT EXISTS (SELECT 1 FROM pg_index i WHERE indrelid = c.oid
AND indkey[0] = -2 AND indnatts = 1
AND indisunique AND indimmediate);
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