shanshanzhong
00255a7118
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refactor: 重构用户模型和密码验证逻辑 feat(epay): 添加支付类型支持 docs: 添加安装和配置指南文档 fix: 修复优惠券过期检查逻辑 perf: 优化设备解绑缓存清理流程 test: 添加密码验证测试用例 chore: 更新依赖版本
21 lines
508 B
SQL
21 lines
508 B
SQL
-- 只有当 ads 表中不存在 description 字段时才添加
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SET
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@col_exists := (
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SELECT COUNT(*)
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FROM INFORMATION_SCHEMA.COLUMNS
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WHERE TABLE_SCHEMA = DATABASE()
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AND TABLE_NAME = 'ads'
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AND COLUMN_NAME = 'description'
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);
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SET
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@query := IF(
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@col_exists = 0,
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'ALTER TABLE `ads` ADD COLUMN `description` VARCHAR(255) DEFAULT '''' COMMENT ''Description'';',
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'SELECT "Column `description` already exists"'
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);
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PREPARE stmt FROM @query;
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EXECUTE stmt;
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DEALLOCATE PREPARE stmt;
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