IF SET 帮助Oracle转DB2

Question

我必须将所有过程从 Oracle 迁移到 DB2 数据库。我想知道，如何在 Oracle 工作时在 IF 中执行 SET 语法。

在 Oracle 中使用的变量是 ps_iPkCooperativa 并且正在接收 0。

甲骨文代码：

BEGIN
    SELECT CCOOP
      INTO ps_iPkCooperativa
      FROM COOP
    EXCEPTION
        WHEN NO_DATA_FOUND
        THEN  ps_iPkCooperativa := 0;
END;

我如何在 DB2 中执行此操作？

Answer 1

您可以对 db2 进行这样的转换：

    BEGIN ATOMIC
     DECLARE ps_iPkCooperativa INT;

        SELECT CCOOP
          INTO ps_iPkCooperativa
          FROM COOP;         
     SIGNAL SQLSTATE '02000' -- means no_data_found
          SET MESSAGE_TEXT='No Data Found ';
          SET ps_iPkCooperativa = 0;
    END@

其中

The ATOMIC compound statement, as the name suggests, can be thought of as a singular whole—if any unhandled error conditions arise within it, all statements which have been executed up to that point are considered to have failed as well and are therefore rolled back. ATOMIC compound statements cannot be nested inside other ATOMIC compound statements.

In addition, you cannot use SAVEPOINTs or issue explicit COMMITs or ROLLBACKs from within an ATOMIC compound statement.

NOTE

COMMIT, ROLLBACK, SAVEPOINTS and nested ATOMIC compound statements are not allowed within an ATOMIC compound statement.

IF SET 帮助Oracle转DB2

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