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32 lines
866 B
SQL
32 lines
866 B
SQL
SET @idx_count := (
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SELECT COUNT(1)
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FROM INFORMATION_SCHEMA.STATISTICS
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WHERE TABLE_SCHEMA = DATABASE()
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AND TABLE_NAME = 'stu_rank'
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AND INDEX_NAME = 'idx_stu_rank_update_school'
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);
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SET @ddl := IF(
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@idx_count = 0,
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'ALTER TABLE stu_rank ADD INDEX idx_stu_rank_update_school (update_time, school_id)',
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'SELECT ''idx_stu_rank_update_school exists'''
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);
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PREPARE stmt FROM @ddl;
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EXECUTE stmt;
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DEALLOCATE PREPARE stmt;
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SET @idx_count := (
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SELECT COUNT(1)
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FROM INFORMATION_SCHEMA.STATISTICS
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WHERE TABLE_SCHEMA = DATABASE()
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AND TABLE_NAME = 'stu_rank'
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AND INDEX_NAME = 'idx_stu_rank_update_class'
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);
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SET @ddl := IF(
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@idx_count = 0,
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'ALTER TABLE stu_rank ADD INDEX idx_stu_rank_update_class (update_time, school_class_id)',
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'SELECT ''idx_stu_rank_update_class exists'''
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);
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PREPARE stmt FROM @ddl;
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EXECUTE stmt;
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DEALLOCATE PREPARE stmt;
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