56b18ca7bf
* MM-45956: Optimize FileInfo stats query We Denormalize Post.ChannelId on FileInfo.ChannelId ```release-note The file info stats query is now optimized by denormalizing the channelID column into the table itself. This will speed up the query to get the file count for a channel on clicking the RHS. Migration times: On a MySQL 8.0.31 DB with 1405 rows in FileInfo and 11M posts, it took around 0.3s On a Postgres 12.14 DB with 1731 rows in FileInfo and 11M posts, it took around 0.27s ``` https://mattermost.atlassian.net/browse/MM-45956
30 строки
880 B
SQL
30 строки
880 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 = 'FileInfo'
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AND table_schema = DATABASE()
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AND index_name = 'idx_fileinfo_channel_id_create_at'
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) > 0,
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'DROP INDEX idx_fileinfo_channel_id_create_at ON FileInfo;',
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'SELECT 1'
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));
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PREPARE removeIndexIfExists FROM @preparedStatement;
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EXECUTE removeIndexIfExists;
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DEALLOCATE PREPARE removeIndexIfExists;
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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 = 'FileInfo'
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AND table_schema = DATABASE()
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AND column_name = 'ChannelId'
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) > 0,
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'ALTER TABLE FileInfo DROP COLUMN ChannelId;',
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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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