fix(db): Avoid dirty reads while deleting messages by uid #9423
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Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>
ChristophWurst
commented
Feb 29, 2024
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| foreach (array_chunk($uids, 1000) as $chunk) { | ||
| $messageIdQuery->setParameter('uids', $chunk, IQueryBuilder::PARAM_INT_ARRAY); | ||
| $cursor = $messageIdQuery->executeQuery(); |
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The original implementation of deleteByUid did use a sub query too: #4663. Then #4947 added an intermediate fetch. @miaulalala do you remember why this was done?
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Most likely because I ran into the usual subquery issues (where to put the brackets) and didn't know how to fix it back then.
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Good. Then this change is safe :)
6 tasks
st3iny
approved these changes
Mar 5, 2024
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This method was prone to dirty reads before. Now there are only write queries.
Ref nextcloud/groupware#24
How to test