我很难从我的存储过程中产生正确的结果。我使用的是 db2 数据库,我有 3 个输入参数部门、部门、项目。我的电话声明看起来像这样。
CALL schema.stored_procedure ('IT', 'MARKETING', 'ONLINE FULFILLMENT')
我需要生成在指定第三个参数或具有项目名称值(如上例'Online_fulfillment')时显示数据行的结果,并在第三个参数具有时显示所有结果项目名称的值“ALL”(根据下面的示例'ALL')。
CALL schema.stored_procedure ('IT', 'MARKETING', 'ALL')
我下面的查询目前只返回列标题名称而没有结果,我在调试它时遇到了麻烦。这是我当前的存储过程。
CREATE PROCEDURE schema.stored_procedure
(IN in_DIVISION_NAME VARCHAR(200)
,IN in_DEPARTMENT_NAME VARCHAR(20)
,IN in_PROJECT_NAME VARCHAR(400)
)
DYNAMIC RESULT SETS 1
BEGIN
IF (in_PROJECT_NAME = 'ALL') THEN
BEGIN
DECLARE GLOBAL TEMPORARY TABLE TEMP_DW_1
(DIM_PROJECT_ID INT
,PROJECT_NAME VARCHAR (400)
,DIM_DEPARTMENT_ID INT
,DEPARTMENT_NAME VARCHAR(100)
,DIVISION_NAME VARCHAR(100)
) ON COMMIT DELETE ROWS NOT LOGGED WITH REPLACE;
END;
INSERT INTO SESSION.TEMP_DW_1 (DIM_PROJECT_ID, PROJECT_NAME, DIM_DEPARTMENT_ID,
DEPARTMENT_NAME,DIVISION_NAME)
SELECT DISTINCT DJ.DIM_PROJECT_ID
,PROJECT_NAME
,DIM_DEPARTMENT_ID
,DEPARTMENT_NAME
,DIVISION_NAME
FROM SCHEMA.FACT_TABLE
WHERE DEPARTMENT_NAME = in_DEPARTMENT_NAME
AND DIVISION_NAME = in_DIVISION_NAME;
BEGIN
DECLARE exitCursor CURSOR WITH RETURN FOR
SELECT *
FROM SESSION.TEMP_DW_1;
OPEN exitCursor;
END;
END
预期结果: CALL schema.stored_procedure ('IT', 'MARKETING', 'ONLINE FULFILLMENT') 预期成绩: CALL schema.stored_procedure ('IT', 'MARKETING', 'ALL')
我相信我已经通过添加一个额外的 IF 语句设置 in_PROJECT_NAME <> 'ALL' 并向设置 PROJECT_NAME = in_PROJECT_NAME 的第二个查询添加一个额外的过滤器来解决这个问题。可能是解决此问题的更简单方法,但它有效:
IF (in_PROJECT_NAME <> 'ALL') THEN
BEGIN
DECLARE GLOBAL TEMPORARY TABLE TEMP_DW_1
(DIM_PROJECT_ID INT
,PROJECT_NAME VARCHAR (400)
,DIM_DEPARTMENT_ID INT
,DEPARTMENT_NAME VARCHAR(100)
,DIVISION_NAME VARCHAR(100)
) ON COMMIT DELETE ROWS NOT LOGGED WITH REPLACE;
END;
INSERT INTO SESSION.TEMP_DW_1 (DIM_PROJECT_ID, PROJECT_NAME, DIM_DEPARTMENT_ID,
DEPARTMENT_NAME ,DIVISION_NAME)
SELECT DISTINCT DJ.DIM_PROJECT_ID
,PROJECT_NAME
,DIM_DEPARTMENT_ID
,DEPARTMENT_NAME
,DIVISION_NAME
FROM SCHEMA.FACT_TABLE
WHERE DEPARTMENT_NAME = in_DEPARTMENT_NAME
AND DIVISION_NAME = in_DIVISION_NAME;
AND PROJECT_NAME = in_PROJECT_NAME