帶存儲過程的DB2存儲過程

Question

我很難從存儲過程中產生正確的結果。我使用的是db2數據庫，我有3個輸入參數division，department，project。我的通話聲明看起來像這樣。

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

我需要產生的結果將顯示數據的行，當指定了第三個參數或具有的項目名稱的值（如從上方「Online_fulfillment」的例子），並顯示所有的第三個參數的項目名稱爲「ALL」時的結果（以下示例爲'ALL'）。

CALL schema.stored_procedure ('IT', 'MARKETING', 'ALL') 

我下面的查詢只返回列標題名稱，沒有結果，我在調試時遇到了麻煩。這是我目前的存儲過程。

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 

預計業績： CALL schema.stored_procedure（ 'IT'， '市場營銷'， 'ONLINE應驗'） 預計業績： CALL schema.stored_procedure（ 'IT'， '市場營銷'，「 ALL'）

Answer 1

我相信我已經通過添加額外的解決了這個IF語句設置in_PROJECT_NAME <>‘全部’，並增加了過濾器，用於設置PROJECT_NAME = in_PROJECT_NAME第二個查詢。可能是解決這個更簡單的方法，但它的工作原理：

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