Files
team/server/channels/db/migrations/mysql/000056_upgrade_channels_v6.0.down.sql

45 lines
1.3 KiB
SQL

SET @preparedStatement = (SELECT IF(
(
SELECT COUNT(*) FROM INFORMATION_SCHEMA.STATISTICS
WHERE table_name = 'Channels'
AND table_schema = DATABASE()
AND index_name = 'idx_channels_team_id'
) > 0,
'SELECT 1',
'CREATE INDEX idx_channels_team_id ON Channels(TeamId);'
));
PREPARE createIndexIfNotExists FROM @preparedStatement;
EXECUTE createIndexIfNotExists;
DEALLOCATE PREPARE createIndexIfNotExists;
SET @preparedStatement = (SELECT IF(
(
SELECT COUNT(*) FROM INFORMATION_SCHEMA.STATISTICS
WHERE table_name = 'Channels'
AND table_schema = DATABASE()
AND index_name = 'idx_channels_team_id_type'
) > 0,
'DROP INDEX idx_channels_team_id_type ON Channels;',
'SELECT 1'
));
PREPARE removeIndexIfExists FROM @preparedStatement;
EXECUTE removeIndexIfExists;
DEALLOCATE PREPARE removeIndexIfExists;
SET @preparedStatement = (SELECT IF(
(
SELECT COUNT(*) FROM INFORMATION_SCHEMA.STATISTICS
WHERE table_name = 'Channels'
AND table_schema = DATABASE()
AND index_name = 'idx_channels_team_id_display_name'
) > 0,
'DROP INDEX idx_channels_team_id_display_name ON Channels;',
'SELECT 1'
));
PREPARE removeIndexIfExists FROM @preparedStatement;
EXECUTE removeIndexIfExists;
DEALLOCATE PREPARE removeIndexIfExists;