带参数的 DB2 存储过程

Question

我很难从我的存储过程中产生正确的结果。我正在使用 db2 数据库，我有 3 个输入参数部门、部门、项目。我的调用语句如下所示。

CALL schema.stored_procedure ('IT', 'MARKETING', 'ONLINE FULFILLMENT')

当指定第三个参数或具有项目名称的值时，我需要生成将显示该行数据的结果（如上面的示例 'Online_fulfillment'）并显示所有当第三个参数的项目名称值为“ALL”时的结果（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没有结果的列标题名称，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')

Answer 1

我相信我已经解决了这个问题，方法是添加一个额外的 IF 语句设置 in_PROJECT_NAME 'ALL' 并在第二个查询中添加一个额外的过滤器来设置 PROJECT_NAME = in_PROJECT_NAME。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