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[stable3.7] fix(db): Delete recipients without sub query #9813

Merged
merged 1 commit into from
Jul 8, 2024
Merged

[stable3.7] fix(db): Delete recipients without sub query #9813

merged 1 commit into from
Jul 8, 2024

Commits on Jul 8, 2024

  1. fix(db): Delete recipients without sub query 

    MySQL does not use indexes for the "dependent" subquery. It's either a
bug or a missing optimization. EXPLAIN for the two queries is fine in
isolation but when you DELETE with subquery neither the inner nor the
outher query use an index. This causes a full table scan on very large
tables.

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>
    @ChristophWurst @backportbot
    ChristophWurst authored and backportbot[bot] committed Jul 8, 2024
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