Created
May 3, 2021 10:19
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/* Source and reasoning: https://www.cybertec-postgresql.com/en/get-rid-of-your-unused-indexes/ */ | |
SELECT s.schemaname, | |
s.relname AS tablename, | |
s.indexrelname AS indexname, | |
pg_relation_size(s.indexrelid) AS index_size | |
FROM pg_catalog.pg_stat_user_indexes s | |
JOIN pg_catalog.pg_index i ON s.indexrelid = i.indexrelid | |
WHERE s.idx_scan = 0 -- has never been scanned | |
AND 0 <>ALL (i.indkey) -- no index column is an expression | |
AND NOT i.indisunique -- is not a UNIQUE index | |
AND NOT EXISTS -- does not enforce a constraint | |
(SELECT 1 FROM pg_catalog.pg_constraint c | |
WHERE c.conindid = s.indexrelid) | |
ORDER BY pg_relation_size(s.indexrelid) DESC; |
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