CASE语句中的语法不正确

Question

我收到错误

  

语法不正确=

执行此程序时：

DECLARE @I_BRANCH_ID VARCHAR(MAX) 

EXEC GETBALANCE CASE WHEN @I_BRANCH_ID ='' THEN 0 ELSE @I_BRANCH_ID END

Answer 1

您不能将条件语法放入这样的EXECUTE语句中。

相反，请尝试：

IF (@I_BRANCH_ID = '')
    SET @I_BRANCH_ID = '0'

EXECUTE GetBalance @I_BRANCH_ID

编辑：

使用更多参数，您可以简化为：

SELECT @param1 = CASE WHEN @param1 = '' THEN '0' ELSE @param1 END,
       @param2 = CASE WHEN @param2 = '' THEN '0' ELSE @param2 END,
       @param3 = CASE WHEN @param3 = '' THEN '0' ELSE @param3 END
       ... etc etc

Answer 2

尝试与EXECUTE语句分开设置变量的值：

DECLARE @I_BRANCH_ID VARCHAR(MAX) 

SET @I_BRANCH_ID = CASE WHEN @I_BRANCH_ID = '' THEN 0 ELSE @I_BRANCH_ID END

EXEC GETBALANCE @I_BRANCH_ID

Answer 3

DECLARE @I_BRANCH_ID VARCHAR(MAX)
SET @I_BRANCH_ID = CASE WHEN @I_BRANCH_ID = '' THEN '0' ELSE @I_BRANCH_ID END
EXEC GETBALANCE @I_BRANCH_ID