-- 1. 收货单明细表新增尺寸字段
ALTER TABLE RECEIPT_MATERIAL_DETAIL ADD DIMENSIONS VARCHAR2(255);
COMMENT ON COLUMN RECEIPT_MATERIAL_DETAIL.DIMENSIONS IS '尺寸';

-- 2. 上架单明细表新增尺寸字段
ALTER TABLE SHELF_MATERIAL_DETAIL ADD DIMENSIONS VARCHAR2(255);
COMMENT ON COLUMN SHELF_MATERIAL_DETAIL.DIMENSIONS IS '尺寸';

-- 拣货单明细新增规格字段 (SIZE)
ALTER TABLE PICKING_MATERIAL_DETAIL ADD "SIZE" VARCHAR2(255);
COMMENT ON COLUMN PICKING_MATERIAL_DETAIL."SIZE" IS '尺寸';

-- 1) 创建序列（若已存在会报错，可先跳过或改名）
CREATE SEQUENCE SEQ_MATERIAL_BASE_INFO_ID
    START WITH 1
    INCREMENT BY 1
    NOCACHE
NOCYCLE;

-- 2) 将序列起始值调整到“当前最大ID+1”
DECLARE
v_next BIGINT;
BEGIN
SELECT NVL(MAX(MATERIAL_BASE_INFO_ID), 0) + 1
INTO v_next
FROM MATERIAL_BASE_INFO;

EXECUTE IMMEDIATE 'DROP SEQUENCE SEQ_MATERIAL_BASE_INFO_ID';
EXECUTE IMMEDIATE 'CREATE SEQUENCE SEQ_MATERIAL_BASE_INFO_ID START WITH ' || v_next || ' INCREMENT BY 1 NOCACHE NOCYCLE';
END;
/

-- 3) 创建触发器：仅在主键为空时自动赋值
CREATE OR REPLACE TRIGGER TRG_MATERIAL_BASE_INFO_BI
BEFORE INSERT ON MATERIAL_BASE_INFO
FOR EACH ROW
BEGIN
    IF :NEW.MATERIAL_BASE_INFO_ID IS NULL THEN
SELECT SEQ_MATERIAL_BASE_INFO_ID.NEXTVAL
INTO :NEW.MATERIAL_BASE_INFO_ID
FROM DUAL;
END IF;
END;
/