同步历史版本代码

initialize/migrate/database/02127_redemption_status.down.sql

@@ -1,2 +1,17 @@
--- Remove status column from redemption_code table
-ALTER TABLE `redemption_code` DROP COLUMN `status`;
+SET @dbname = DATABASE();
+SET @tablename = 'redemption_code';
+SET @colname = 'status';
+SET @sql = (
+    SELECT IF(
+        COUNT(*) > 0,
+        'ALTER TABLE `redemption_code` DROP COLUMN `status`;',
+        'SELECT "Column `status` does not exist";'
+    )
+    FROM information_schema.COLUMNS
+    WHERE TABLE_SCHEMA = @dbname
+      AND TABLE_NAME = @tablename
+      AND COLUMN_NAME = @colname
+);
+PREPARE stmt FROM @sql;
+EXECUTE stmt;
+DEALLOCATE PREPARE stmt;