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Much more meaningful then ORA-06510: PL/SQL: unhandled user-defined exception So -- if the error is going to propagate OUT OF plsql (back to a client) i like to catch it and I've come to such conclusions myself but never tried to express them in such a solid way! Is it something that should be done from the database? Answer: The raise_application_error is actually a procedure defined by Oracle that allows the developer to raise an exception and associate an error number and message with the procedure.

Predefined PL/SQL Exceptions An internal exception is raised implicitly whenever your PL/SQL program violates an Oracle rule or exceeds a system-dependent limit. That is, normal execution stops and control transfers to the exception-handling part of your PL/SQL block or subprogram. If the optional third parameter is TRUE, the error is placed on the stack of previous errors. When we have a large program, we capture the location and state into specific variables which we output using WHEN OTHERS (RAISE_APPLICATION_ERROR).

NOT_LOGGED_ON 01012 -1012 A program issues a database call without being connected to the database. Therefore, the RAISE statement and the WHEN clause refer to different exceptions. Then I ask you something and you think I'm from a different planet. Also, if a stored subprogram fails with an unhandled exception, PL/SQL does not roll back database work done by the subprogram.

A GOTO statement cannot branch into an exception handler, or from an exception handler into the current block. The error number and message can be trapped like any Oracle error. The procedure in Example 11-16 has unnecessary code that can be removed. Unlike variables, exceptions cannot appear in assignment statements or SQL statements.

Passing a VARCHAR2 value to a NUMBER column in an INSERT statement INFORMATIONAL Condition does not affect performance or correctness, but you might want to change it to make the code The functions SQLCODE and SQLERRM are especially useful in the OTHERS exception handler because they tell you which internal exception was raised. However, exceptions cannot propagate across remote procedure calls (RPCs). Make sure you pass negative error numbers to SQLERRM.

If you exit a subprogram successfully, PL/SQL assigns values to OUT parameters. Say I ran out of space on a log table or something (has happened once or twice in the past). If the INSERT succeeds, exit from the loop immediately. However, when an exception is raised inside a cursor FOR loop, the cursor is closed implicitly before the handler is invoked.

How to explain the concept of test automation to a team that only knows manual testing? UTL_FILE raises about 5 or 6 different "user defined exceptions" -- i use raise_application_error to turn them into meaningful error messages. insert what you can, put the bad rows over here. But, if the need arises, you can use a locator variable to track statement execution, as follows: DECLARE stmt INTEGER := 1; -- designates 1st SELECT statement BEGIN SELECT ...

SQL> insert into company values(2,1004,'D Inc.','Long Name D Inc.'); 1 row created. The loss of the OTHERS exception handler would be a disaster for many data loads. END; Omitting the exception name in a RAISE statement--allowed only in an exception handler--reraises the current exception. Not convinced...

TOO_MANY_ROWS 01422 -1422 A SELECT INTO statement returns more than one row. SQL> SQL> DECLARE 2 v_product_id NUMBER := 6; 3 v_company_id NUMBER := 1010; 4 v_company_short_name VARCHAR2(30):= 'Office Inc.'; 5 v_company_long_name VARCHAR2(60):= 'Office Inc.'; 6 excep1 EXCEPTION; 7 PRAGMA EXCEPTION_INIT(excep1,-20000); 8 excep2 The procedure is just a ref cursor selecting some data. Before starting the transaction, mark a savepoint.

Without exception handling, every time you issue a command, you must check for execution errors: BEGIN SELECT ... -- check for 'no data found' error SELECT ... -- check for 'no You can also perform a sequence of DML operations where some might fail, and process the exceptions only after the entire operation is complete, as described in "Handling FORALL Exceptions with The maximum length of an Oracle error message is 512 characters including the error code, nested messages, and message inserts such as table and column names. The when others would fire upon some spurious -- un-expected error and the record would be neither added nor updated.

DECLARE l_table_status VARCHAR2(8); l_index_status VARCHAR2(8); l_table_name VARCHAR2(30) := 'TEST'; l_index_name VARCHAR2(30) := 'IDX_TEST'; ex_no_metadata EXCEPTION; BEGIN BEGIN SELECT STATUS INTO l_table_status FROM USER_TABLES WHERE TABLE_NAME = l_table_name; EXCEPTION WHEN NO_DATA_FOUND THEN With many programming languages, unless you disable error checking, a run-time error such as stack overflow or division by zero stops normal processing and returns control to the operating system. Should the whole load fail because of two dodgy rows? Advantages of PL/SQL Exceptions Using exceptions for error handling has several advantages.

It's main value comes as a catch-all surrounding an entire transaction, where failure of that transaction should not halt program execution. It's tough to learn to do the right things when you are working with bad code, you become desensitized by it. Consider the ERROR abbreviated package source I use (full source: error.pks and error.pkb):create or replace package error is package_name constant varchar2(32) := 'error'; -- in case you want to change the The TRANSACTION would be rolled back.