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Remove redundant COALESCE()s around COUNT()s in database queries (#11570)

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`COUNT()` never returns `NULL`. A `COUNT(*)` over 0 rows is 0 and a
`COUNT(NULL)` is also 0.
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Sean Quah 2021-12-14 12:34:30 +00:00 • committed by GitHub
parent 33abbc3278
commit a4dce5b53d
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9 changed files with 20 additions and 21 deletions
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synapse/storage/databases/main/stats.py
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@ -538,7 +538,7 @@ class StatsStore(StateDeltasStore):
txn.execute(
"""
SELECT COALESCE(count(*), 0) FROM current_state_events
SELECT COUNT(*) FROM current_state_events
WHERE room_id = ?
""",
(room_id,),