or in the DECLARE section of a PL/SQL package. The syntax PRAGMA EXCEPTION_INIT or PRAGMA DB2_EXCEPTION_INIT can be used immediately after the definition of an exception, specifying the sqlcode or sqlstate that
PL/SQL --> 存储过程 PL/SQL --> 函数 PL/SQL --> 游标 PL/SQL -->隐式游标(SQL%FOUND) PL/SQL --> 异常处理(Exception) PL/SQL --> PL/SQL记录 PL/SQL --> 包的创建与管理 PL/SQL --> 包重载、初始化 PL/SQL --> DBMS_DDL包的使用 PL/SQL --> DML 触发器 PL/SQL --> INSTEAD ...
Inside the EXCEPTION block the DBMS_OUTPUT.PUT_LINE procedure displays an error message indicating that a division by zero has occurred. Flowchart: Previous:PL/SQL Exception Handling Exercises Home. Next:Handling NO_DATA_FOUND exception in PL/SQL....
在PL/SQL程序中的异常处理机制使得在出现某些错误的时候程序仍然可以执行。比如内部溢出或者零除等等。 用户可以处理的只有运行时异常,而对于编译的异常,只能通过语法解决。 异常情况处理(EXCEPTION)是用来处理正常执行过程中未预料的事件,程序块的异常处理预定义的错误和自定义错误,由于PL/SQL程序块一旦产生异常而没有...
In the above syntax, we use exception handling to handle all types of exceptions. Here we first used the declare section, an optional part of this syntax. After that, we use the execution section, and inside the execution section, we write the WHEN condition to handle the exception. For ...
exception3-handling-statements END; 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 预定义异常 PL/SQL提供许多预先定义的异常,这是在被执行时的任何数据库规则由程序引发。例如,预定义异常NO_DATA_FOUND时引发一个SELECT INTO语句返回数据行。下表列出了一些重要的预先定义的异常:...
The PLVexc (PL/Vision EXCeption handling) package provides a powerful, plug-and-play component to perform exception handling in yourPL/SQLprograms. It makes use of PLVlog to automatically write errors to the log of your choice (database table,PL/SQLtable, etc.). It offers high-level except...
To be able to recover from errors, PL/pgSQL can trap the errors using the EXCEPTION clause. The syntax of the exception clause is very similar to the PL/pgSQL blocks. Moreover, PostgreSQL can raise errors using the RAISE statement. To understand exception handling, let us consider the ...
异常情况处理 (EXCEPTION) 是用来处理正常执行过程中未预料的事件,程序块的异常处理预定义的错误和自定义错误,由于 PL/SQL 程序块一旦产生异常而没有指出如何处理时 , 程序就会自动终止整个程序运行 。 有三种类型的异常错误: 1、 预定义 ( Predefined ) 错误 ...
pl/sql 中关于exception的学习笔记 1、异常的优点 如果没有异常,在程序中,应当检查每个命令的成功还是失败,如 BEGIN SELECT ... -- check for ’no data found’ error SELECT ... -- check for ’no data found’ error SELECT ... -- check for ’no data found’ error...