1. 定义异常处理块 你可以在PL/SQL代码块中使用BEGIN ... END;结构,并在其中使用EXCEPTION部分来捕获和处理异常。 2. 捕获特定异常 你可以捕获Oracle预定义的异常,如NO_DATA_FOUND、TOO_MANY_ROWS等,或者自定义异常。 3. 使用PRAGMA EXCEPTION_INIT 对于非Oracle预定义的错误号,你可以使用PRAGMA EXCEPTION_INIT来...
用RAISE语句重新引发当前异常Reraising Current Exception with RAISE StatementIn Example, the handling of the exception starts in the inner block and finishes in the outer block. The outer block declares the exception, so the exception name exists in both blocks, and each block has an exception han...
DBMS_OUTPUT.PUT_LINE('Handling PAST_DUE exception.'||acct_num); WHEN OTHERS THEN DBMS_OUTPUT.PUT_LINE('Could not recognize PAST_DUE_EXCEPTION in this scope.'||acct_num); END;--- sub-block ends EXCEPTION WHEN past_due THEN-- does not handle raised exception DBMS_OUTPUT.PUT_LINE('Handl...
<exception handling> END; Hello World示例 1 2 3 4 5 6 DECLARE message varchar2(20):='Hello, World!'; BEGIN dbms_output.put_line(message); END; / END;行表示PL/SQL块的结尾。要从SQL命令行运行代码,需要在代码的最后一行之后键入/字符。当上述代码在SQL提示符下执行时,它会产生以下结果 - 1 ...
一.PL/SQL 定义 PL/SQL is theOracle Database procedural extension to SQL. PL/SQL is integrated with thedatabase, supporting all Oracle SQL statements, functions, and datatypes. Applications written in database APIs can invoke PL/SQL storedsubprograms and send PL/SQL code blocks ...
35 6 BEGIN 23:19:35 7 RETURN ORDINAL(N); 23:19:35 8 END; 23:19:35 9 BEGIN 23:19:35 10 IF ONE_THING = ORDINAL(3) THEN 23:19:35 11 DBMS_OUTPUT.PUT_LINE('[' || ORDINAL(3) || ']'); 23:19:35 12 END IF; 23:19:35 13 END; 23:19:36 14 / [Three] PL/SQL 进程...
Updated PL/SQL output with exception handling Notice the new screen output at the bottom of Figure 4-3, which consists of the following text: Success - we got here 1! We hit a general exception Let’s compare this to the PL/SQL code in Figure 4-2. The first message occurs just ...
Exception Handling For exception handling, use the following tips. Errors in Oracle Forms PL/SQL If a failure occurs in Oracle Forms PL/SQL and you want to stop further processing, use FND_MESSAGE to display an error message, then RAISE FORM_TRIGGER_FAILURE to stop processing: ...
ORA-06512: This error is raised when an exception is raised within the function being called. Check for any error handling code within the function that may be causing the exception to be raised. ORA-04068: This error is raised when the function being called is invalid or in an invalid st...
Exception handling is done per pointer record, which means that if two or more pointer records are pointing to the same "original" data, any exceptions that are reported indicate the iteration number (pointer element number).This example uses the EMPLOYEES table to build a collection of ...