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deploy/sql/migrations/overseas/baiyue_lastleg/V30__add_fba_appointment_replacement_numbers.sql

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+-- Region: OVERSEAS
+-- Schema: baiyue_lastleg
+-- Purpose: 补齐预约分批/合并后的替代预约业务号快照，供入仓计划查询过滤原预约。
+-- 可重复执行；不修改既有预约数据。
+SET @ddl = IF(
+  EXISTS (
+    SELECT 1 FROM information_schema.columns
+    WHERE table_schema = DATABASE()
+      AND table_name = 'll_inbound_fba_appointment'
+      AND column_name = 'replacement_nos_json'
+  ),
+  'SELECT 1',
+  'ALTER TABLE ll_inbound_fba_appointment ADD COLUMN replacement_nos_json LONGTEXT NULL COMMENT ''分批或合并后的新预约业务号列表，非空时原批次只读'' AFTER selected_count'
+);
+PREPARE stmt FROM @ddl;
+EXECUTE stmt;
+DEALLOCATE PREPARE stmt;