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MrHen/snapshot_changes.sql

Created December 29, 2017 19:09
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Snapshot SQL
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snapshot_changes.sql
EXPLAIN ANALYZE SELECT COALESCE(src.key, dst.key) as key
, dst.key IS NULL as added
, src.key IS NULL as removed
, COALESCE(md5(src::text) <> md5(dst::text), false) as changed
, md5(src::text) as src_hash
, md5(src::text) as dst_hash
FROM "ab_two" as src
FULL OUTER JOIN "ab_one" as dst ON (src.key = dst.key)
WHERE md5(src::text) IS NULL
OR md5(dst::text) IS NULL
OR md5(src::text) <> md5(dst::text)
;
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