-- 退货按 SKU 件数贴标增量（MySQL 8.0，可重复执行）。
-- 生产及存量库只需执行本文件；新库字段同时维护在 lastleg.sql。
USE baiyue_lastleg;

SET @ddl = (
  SELECT IF(
    EXISTS (
      SELECT 1
      FROM information_schema.columns
      WHERE table_schema = DATABASE()
        AND table_name = 'll_relabel_pda_unit_fact'
        AND column_name = 'quantity'
    ),
    'SELECT 1',
    'ALTER TABLE ll_relabel_pda_unit_fact ADD COLUMN quantity INT NOT NULL DEFAULT 1 COMMENT ''本次事实处理件数，箱级作业固定为1'' AFTER reason'
  )
);
PREPARE ll_return_bulk_relabel_quantity_stmt FROM @ddl;
EXECUTE ll_return_bulk_relabel_quantity_stmt;
DEALLOCATE PREPARE ll_return_bulk_relabel_quantity_stmt;

SET @ddl = (SELECT IF(EXISTS (SELECT 1 FROM information_schema.table_constraints WHERE constraint_schema=DATABASE() AND table_name='ll_return_inventory_carton' AND constraint_name='chk_ll_return_inventory_carton_quantity'), 'ALTER TABLE ll_return_inventory_carton DROP CHECK chk_ll_return_inventory_carton_quantity', 'SELECT 1'));
PREPARE ll_return_relabel_quantity_check_drop_stmt FROM @ddl;
EXECUTE ll_return_relabel_quantity_check_drop_stmt;
DEALLOCATE PREPARE ll_return_relabel_quantity_check_drop_stmt;
ALTER TABLE ll_return_inventory_carton ADD CONSTRAINT chk_ll_return_inventory_carton_quantity CHECK((status IN('AVAILABLE','RELABEL_PENDING','OUTBOUNDED') AND sku_types>0 AND total_quantity>0) OR (status='MERGED' AND sku_types=0 AND total_quantity=0));

SET @ddl = (SELECT IF(EXISTS (SELECT 1 FROM information_schema.table_constraints WHERE constraint_schema=DATABASE() AND table_name='ll_return_inventory_carton' AND constraint_name='chk_ll_return_inventory_carton_status'), 'ALTER TABLE ll_return_inventory_carton DROP CHECK chk_ll_return_inventory_carton_status', 'SELECT 1'));
PREPARE ll_return_relabel_status_check_drop_stmt FROM @ddl;
EXECUTE ll_return_relabel_status_check_drop_stmt;
DEALLOCATE PREPARE ll_return_relabel_status_check_drop_stmt;
ALTER TABLE ll_return_inventory_carton ADD CONSTRAINT chk_ll_return_inventory_carton_status CHECK(status IN('AVAILABLE','RELABEL_PENDING','MERGED','OUTBOUNDED'));

SELECT COUNT(*) = 1 AS return_bulk_relabel_quantity_ready
FROM information_schema.columns
WHERE table_schema = DATABASE()
  AND table_name = 'll_relabel_pda_unit_fact'
  AND column_name = 'quantity'
  AND column_comment = '本次事实处理件数，箱级作业固定为1';

SELECT COUNT(*) = 2 AS return_relabel_carton_checks_ready
FROM information_schema.check_constraints
WHERE constraint_schema = DATABASE()
  AND constraint_name IN ('chk_ll_return_inventory_carton_quantity','chk_ll_return_inventory_carton_status')
  AND check_clause LIKE '%RELABEL_PENDING%';