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If the exception is ever raised in that block (or any sub-block), you can be sure it will be handled. Unlike predefined exceptions, user-defined exceptions must be declared and must be raised explicitly by RAISE statements. SELECT ... Usually raised by trying to cram a 6 character string into a VARCHAR2(5) variable ZERO_DIVIDE ORA-01476 Not only would your math teacher not let you do it, computers won't either. this content

ROWTYPE_MISMATCH ORA-06504 The rowtype does not match the values being fetched or assigned to it. A SQL statement cannot invoke SQLCODE or SQLERRM. Once you know the error code, you can use it with pragma EXCEPTION_INIT and write a handler specifically for that error. Who said you didn't learn anything useful in primary school?

Oracle Raise Exception With Message

Because the exception propagates immediately to the host environment, the exception handler does not handle it. In the following example, you call raise_application_error if an employee's salary is missing: CREATE PROCEDURE raise_salary (emp_id NUMBER, amount NUMBER) AS curr_sal NUMBER; BEGIN SELECT sal INTO curr_sal FROM emp WHERE Expect that at some time, your code will be passed incorrect or null parameters, that your queries will return no rows or more rows than you expect. But when the handler completes, the block is terminated.

SELECT ... You can write handlers for predefined exceptions using the names in the following list: Exception Oracle Error SQLCODE Value ACCESS_INTO_NULL ORA-06530 -6530 CASE_NOT_FOUND ORA-06592 -6592 COLLECTION_IS_NULL ORA-06531 -6531 CURSOR_ALREADY_OPEN ORA-06511 -6511 Retrying a Transaction After an exception is raised, rather than abandon your transaction, you might want to retry it. Pl Sql Exception Handling Best Practices INVALID_NUMBER In a SQL statement, the conversion of a character string into a number fails because the string does not represent a valid number. (In procedural statements, VALUE_ERROR is raised.) This

Raising Exceptions with the RAISE Statement PL/SQL blocks and subprograms should raise an exception only when an error makes it undesirable or impossible to finish processing. Pl Sql Exception Handling Examples This chapter discusses the following topics: Overview of PL/SQL Error Handling Advantages of PL/SQL Exceptions Predefined PL/SQL Exceptions Defining Your Own PL/SQL Exceptions How PL/SQL Exceptions Are Raised How PL/SQL Exceptions Because predefined exceptions have names, you can write exception handlers specifically for them. https://docs.oracle.com/cd/E11882_01/appdev.112/e25519/errors.htm Related Topics Anonymous Block DBMS_UTILITY DDL Triggers Instead-Of Triggers Errors Function Procedure System Events System Triggers Table Triggers UTL_LMS Warnings

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For more information, see "Internally Defined Exceptions". Sqlerrm In Oracle To retrieve the message associated with the exception, the exception handler in the anonymous block invokes the SQLERRM function, described in "Error Code and Error Message Retrieval". The exception handler cannot transfer control back to its own block. That is, the built-in parameter SELF (which is always the first parameter passed to a MEMBER method) is null.

Pl Sql Exception Handling Examples

You can have any number of exception handlers, and each handler can associate a list of exceptions with a sequence of statements. Exceptions declared in a block are considered local to that block and global to all its sub-blocks. Oracle Raise Exception With Message That way, you can report errors to your application and avoid returning unhandled exceptions. Functions For Error Trapping Are Contained In Which Section Of A Pl/sql Block ROWTYPE_MISMATCH The host cursor variable and PL/SQL cursor variable involved in an assignment have incompatible return types.

In the following example, you pass positive numbers and so get unwanted results: DECLARE err_msg VARCHAR2(100); BEGIN /* Get all Oracle error messages. */ FOR err_num IN 1..9999 LOOP err_msg := news An application can call raise_application_error only from an executing stored subprogram (or method). If you exit a subprogram successfully, PL/SQL assigns values to OUT parameters. Place the sub-block inside a loop that repeats the transaction. Pl Sql Continue After Exception

You can avoid unhandled exceptions by coding an OTHERS handler at the topmost level of every PL/SQL program. INVALID_CURSOR 01001 -1001 It is raised when attempts are made to make a cursor operation that is not allowed, such as closing an unopened cursor. With exceptions, you can handle errors conveniently without the need to code multiple checks, as follows: BEGIN SELECT ... http://iipseconline.com/pl-sql/pl-sql-error-exception-handling.html Reraising Current Exception with RAISE Statement In an exception handler, you can use the RAISE statement to"reraise" the exception being handled.

Why are planets not crushed by gravity? Oracle Cursor Exception Handling Within A Loop When Invalid Cursor Exception Demo CREATE OR REPLACE PROCEDURE invcur_exception IS CURSOR x_cur is SELECT * FROM all_tables; x_rec x_cur%rowtype; BEGIN LOOP -- note the cursor was not opened SELECT ...

For example, a better way to do the insert follows: INSERT INTO stats (symbol, ratio) SELECT symbol, DECODE(earnings, 0, NULL, price / earnings) FROM stocks WHERE symbol = 'XYZ'; In this

http://download-west.oracle.com/docs/cd/B19306_01/appdev.102/b14261/exceptioninit_pragma.htm share|improve this answer edited Mar 7 '10 at 22:32 answered Mar 6 '10 at 8:55 Pavel Ulpi 493 see this link for correct syntax and working examle: docs.oracle.com/cd/B10500_01/appdev.920/a96624/07_errs.htm#8‌77 If none of the blocks handle the exception the program ends abruptly with an error. 3) Types of Exception. When the exception handler completes, the sub-block terminates, control transfers to the LOOP statement in the enclosing block, the sub-block starts executing again, and the transaction is retried. Exception No Data Found Oracle When an exception is raised, Oracle searches for an appropriate exception handler in the exception section.

So, you need not declare them yourself. If an error occurs, and that error is handled at any level by the time we're back at the SQL*Plus prompt, we only rollback to the immediate savepoint at the start In Example 11-20, the exception-handling part of the procedure has exception handlers for user-defined exception i_is_one and predefined exception ZERO_DIVIDE. http://iipseconline.com/pl-sql/pl-sql-error-handling-exception.html SUBSCRIPT_OUTSIDE_LIMIT Your program references a nested table or varray element using an index number (-1 for example) that is outside the legal range.

HandleAll should be called from all exception handlers where you want the error to be logged. Before starting the transaction, mark a savepoint. However, an exception name can appear only once in the exception-handling part of a PL/SQL block or subprogram. SUBSCRIPT_BEYOND_COUNT Your program references a nested table or varray element using an index number larger than the number of elements in the collection.

Tips for Handling PL/SQL Errors In this section, you learn three techniques that increase flexibility. If the company has zero earnings, the division operation raises the predefined exception ZERO_DIVIDE and the executable part of the block transfers control to the exception-handling part. Exceptions can be internally defined (by the run-time system) or user defined. If there is no handler for the exception, then PL/SQL returns an unhandled exception error to the invoker or host environment, which determines the outcome (for more information, see "Unhandled Exceptions").

Also, a GOTO statement cannot branch from an exception handler into the current block. Enclosing block: Row inserted. You can enable and disable entire categories of warnings (ALL, SEVERE, INFORMATIONAL, PERFORMANCE), enable and disable specific message numbers, and make the database treat certain warnings as compilation errors so that If a subprogram exits with an unhandled exception, then actual parameters for OUT and IN OUT formal parameters passed by value (the default) retain the values that they had before the

Errors are especially likely during arithmetic calculations, string manipulation, and database operations. Consider the following example: BEGIN DECLARE ---------- sub-block begins past_due EXCEPTION; due_date DATE := trunc(SYSDATE) - 1; todays_date DATE := trunc(SYSDATE); BEGIN IF due_date < todays_date THEN RAISE past_due; END IF; END log_error; / To Test The Error Logging Procedure exec log_error('Test', 'None', 'Did it work?'); SELECT * FROM errorlog; Database-Wide Exception Handling Using AFTER SERVERERROR CREATE TABLE error_log ( error_timestamp If no exception has been raised, SQLCODE returns zero and SQLERRM returns the message: ORA-0000: normal, successful completion.