在DB2 Store过程中使用IF语句

Question

如何使用IF和ELSE语句来定义要根据“深度INTEGER”运行多少存储过程？ （例如，如果用户使用1所述的深度周长，仅第一部分将被加工的）

--#SET TERMINATOR/

CREATE PROCEDURE STOREP2(IN str_in VARCHAR(1), IN depth INTEGER) 
        LANGUAGE SQL MODIFIES SQL DATA 
        DYNAMIC RESULT SETS 1 


CRSUBJ: BEGIN 

DECLARE C1 CURSOR WITH RETURN FOR 

SELECT T1.COLUMN1, T1.COLUMN2 FROM TABLE1 AS T1 WHERE T1.COLUMN1=str_in 

UNION 

SELECT T2.COLUMN1, T2.COLUMN2 FROM TABLE1 AS T1, TABLE1 AS T2 WHERE T1.COLUMN1=str_in AND T2.COLUMN1=T1.COLUMN2 

UNION 

SELECT T3.COLUMN1, T3.COLUMN2 FROM TABLE1 AS T1, TABLE1 AS T2, TABLE1 AS T3 WHERE T1.COLUMN1=str_in AND T2.COLUMN1=T1.COLUMN2 AND T3.COLUMN1=T2.COLUMN2 

UNION 

SELECT T4.COLUMN1, T4.COLUMN2 FROM TABLE1 AS T1, TABLE1 AS T2, TABLE1 AS T3, TABLE1 AS T4 WHERE T1.COLUMN1=str_in AND T2.COLUMN1=T1.COLUMN2 AND T3.COLUMN1=T2.COLUMN2 AND T4.COLUMN1=T3.COLUMN2; 

OPEN C1; 
RETURN; 

END CRSUBJ/ 

谢谢:)

Answer 1

更具体地：在你的示例 - 可以”吨。你有效地执行的是对TABLE1的四个查询并将返回的结果光标返回给调用者显示为一个表。这将有助于了解更多的表格结构以及您试图达到的目标，以帮助您解决问题。

Answer 2

Check documentation.