72a5d99ae3
Old versions of the Mattermost server did not qualify queries scanning both `Posts` and `Threads`, and choke on the ambiguity in deciding between the new `DeleteAt` on `Threads` and the `DeleteAt` on `Posts` in existing queries. While this problem is transient only while running multiple server versions, it effectively makes our backwards compatibility guarantee void, not to mention complicating cloud deployments. Work around this by renaming `Threads.DeleteAt` to `Threads.ThreadDeleteAt`. The old migration is nulled out, but remains, since some test servers have already upgraded and manually fixing each affected instance would be problematic. Thew new migration takes care of removing the old column -- if it ever existed. Fixes: https://mattermost.atlassian.net/browse/MM-43770 Co-authored-by: Mattermod <mattermod@users.noreply.github.com>
15 строки
431 B
SQL
15 строки
431 B
SQL
SET @preparedStatement = (SELECT IF(
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EXISTS(
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SELECT 1 FROM INFORMATION_SCHEMA.STATISTICS
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WHERE table_name = 'Threads'
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AND table_schema = DATABASE()
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AND column_name = 'ThreadDeleteAt'
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) > 0,
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'ALTER TABLE Threads DROP COLUMN ThreadDeleteAt;',
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'SELECT 1;'
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));
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PREPARE removeColumnIfExists FROM @preparedStatement;
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EXECUTE removeColumnIfExists;
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DEALLOCATE PREPARE removeColumnIfExists;
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