17 строки
476 B
SQL
17 строки
476 B
SQL
SET @preparedStatement = (SELECT IF(
|
|
(
|
|
SELECT COUNT(*) FROM INFORMATION_SCHEMA.STATISTICS
|
|
WHERE table_name = 'Posts'
|
|
AND table_schema = DATABASE()
|
|
AND index_name = 'idx_posts_channel_id'
|
|
) > 0,
|
|
'SELECT 1',
|
|
'CREATE INDEX idx_posts_channel_id ON Posts(ChannelId);'
|
|
));
|
|
|
|
PREPARE createIndexIfNotExists FROM @preparedStatement;
|
|
EXECUTE createIndexIfNotExists;
|
|
DEALLOCATE PREPARE createIndexIfNotExists;
|
|
|
|
DROP TABLE IF EXISTS Posts;
|