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
35 строки
1.0 KiB
SQL
35 строки
1.0 KiB
SQL
SET @preparedStatement = (SELECT IF(
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NOT EXISTS(
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SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS
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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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),
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'ALTER TABLE FileInfo ADD COLUMN ChannelId varchar(26);',
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'SELECT 1;'
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));
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PREPARE addColumnIfNotExists FROM @preparedStatement;
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EXECUTE addColumnIfNotExists;
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DEALLOCATE PREPARE addColumnIfNotExists;
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UPDATE FileInfo, Posts
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SET FileInfo.ChannelId = Posts.ChannelId
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WHERE FileInfo.PostId = Posts.Id
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AND FileInfo.ChannelId IS NULL;
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SET @preparedStatement = (SELECT IF(
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NOT 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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),
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'CREATE INDEX idx_fileinfo_channel_id_create_at ON FileInfo(ChannelId, CreateAt);',
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'SELECT 1'
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));
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PREPARE createIndexIfNotExists FROM @preparedStatement;
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EXECUTE createIndexIfNotExists;
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DEALLOCATE PREPARE createIndexIfNotExists;
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