CREATEProcedureP_USERS_I(@user_idvarchar(50),@user_namenvarchar(256),@flagINTOUTPUT)ASIF(EXISTS(SELECT*FROMdbo.T_USERSWHERELOWERED_USER_NAME=LOWER(@user_name)OR[USER_ID]=@user_id))BEGINSET@flag=-1RETURNENDINSERTINTOdbo.T_USERS([USER_ID],[USER_NAME],LOWERED_USER_NAME)VALUES(@user_id,...
在SQL Server中我们通过BEGIN TRY/END TRY和BEGIN CATCH/END CATCH这样的结构来进行Exception Handling。 通过TRY CATCH,上面的Stored procedure可以改成下面的样子: CREATEProcedureP_USERS_IN_ROLES_I ( @user_nameNVARCHAR(256), @role_nameNVARCHAR(256) ) AS DECLARE@user_idVARCHAR(50) DECLARE@role_idVARCHA...
SQL Copy Output Example 6. (ERROR_PROCEDURE) ERROR_PROCEDURE returns the name of the Stored Procedure or trigger where an error occurred. The return type of ERROR_PROCEDURE is nvarchar(128). Return value Return value returns the Stored Procedure Name if an error occurs in a Stored Procedure ...
对于所有的开发人员来说,Exception Handling是我们每天都要面对的事情。对于基于Source Code的Exception Handling,我想大家已经司空见惯了,但是对于Database级别的Exception Handling,就没有那么常见了。在这篇文章中,我将会介绍我对于基于Database编程中Exception Handling的一些粗浅的认识:在编写Stored Procedure时,如何抛出一...
The MSSQL server supports multiple result sets as output of a stored procedure. However, if an exception occurs on the SQL side after the first result set is generated, no exceptions are generated on the client side in the pymssql code. ...
在这篇文章中,我将会介绍我对于基于Database编程中Exception Handling的一些粗浅的认识:在编写Stored Procedure时,如何抛出一个可预知的Exception,ADO.NET如何处理从Database抛出的Exception,如何保存基于Database Exception的Error Message,如何在Database和.NET Application之间进行消息的传递[注:这里的Database主要指SQL ...
In JDBC, we may get exceptions when we execute or create the query. Exceptions that occur due to the Database or Driver come under SQL Exception. Using Exception handling, we can handle the SQL Exception like we handle the normal exception. ...
How does the TSQL exception handling mechanism interacts with SQLCLR exception handling mechanism? We will cover this topic in this post. When SQL server execute a user function/procedure/trigger implemented in CLR (i.e., managed code), we will install a managed exception handler around the ...
上面的所以内容都围绕一个Exception handling的主题,在文章最后一部分我们想想一个和非Exception handling但是又和上面的内容很相关的主题:在Database通过Print语句输出的Message如何向Application传递。 在上面的例子中,有一个P_CLEAR_DATA的stored procedure,用于数据的清理。在操作结束后,有一个Print语句(PRINT ('All ...
DELIMITER // CREATE PROCEDURE example_procedure(IN input_param INT) BEGIN DECLARE CONTINUE HANDLER FOR SQLEXCEPTION BEGIN -- 异常处理逻辑 ROLLBACK; SELECT 'An error has occurred, operation rolled back'; END; START TRANSACTION; -- 假设这里有一些SQL操作 INSERT INTO example_table (column1) VALUES ...