16 lines
437 B
SQL
16 lines
437 B
SQL
SET @add_user_contact_info := (
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SELECT IF(
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COUNT(*) = 0,
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'ALTER TABLE users ADD COLUMN contact_info VARCHAR(128) NOT NULL DEFAULT '''' COMMENT ''用户联系信息'' AFTER profile_bg_img',
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'SELECT 1'
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)
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FROM information_schema.COLUMNS
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WHERE TABLE_SCHEMA = DATABASE()
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AND TABLE_NAME = 'users'
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AND COLUMN_NAME = 'contact_info'
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);
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PREPARE stmt FROM @add_user_contact_info;
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EXECUTE stmt;
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DEALLOCATE PREPARE stmt;
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