11 lines
841 B
MySQL
11 lines
841 B
MySQL
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-- 站内信消息等级：通用消息表加 level 列（1普通/2提醒/3警告/4严重，默认普通）
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-- 设计见 docs/superpowers/specs/2026-06-13-告警消息等级-design.md
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-- 幂等：MySQL 不支持 ADD COLUMN IF NOT EXISTS，用 information_schema 判断后 PREPARE 执行
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-- 列定义/注释须与演示库补丁 docs/sql/patches/2026-06-13-告警消息等级-01.sql 块1 保持一致
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SET @col_exists = (SELECT COUNT(*) FROM information_schema.columns
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WHERE table_schema = DATABASE() AND table_name = 'system_notify_message' AND column_name = 'level');
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SET @ddl = IF(@col_exists = 0,
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'ALTER TABLE system_notify_message ADD COLUMN level TINYINT NOT NULL DEFAULT 1 COMMENT ''消息等级:1普通/2提醒/3警告/4严重'' AFTER read_time',
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'SELECT 1');
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PREPARE stmt FROM @ddl; EXECUTE stmt; DEALLOCATE PREPARE stmt;
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