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_docs/sql/005_biz_timestamp_defaults_alter.sql

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+-- 已有库若 `created_at` / `updated_at` 无默认值，插入会失败（模型已关闭 Sequelize timestamps 且未声明时间字段时依赖库默认值）。
+-- 按需对已有表执行（新库直接执行 001/003 即可，无需本文件）。
+
+SET NAMES utf8mb4;
+
+ALTER TABLE `biz_user`
+  MODIFY `created_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  MODIFY `updated_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP;
+
+ALTER TABLE `biz_plans`
+  MODIFY `created_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  MODIFY `updated_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP;
+
+ALTER TABLE `biz_subscriptions`
+  MODIFY `created_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  MODIFY `updated_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP;
+
+ALTER TABLE `biz_api_tokens`
+  MODIFY `created_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  MODIFY `updated_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP;
+
+ALTER TABLE `biz_usage_monthly`
+  MODIFY `created_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  MODIFY `updated_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP;
+
+ALTER TABLE `biz_audit_log`
+  MODIFY `created_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP;