Raise_application_error Error Numbers
DECLARE ---------- sub-block begins past_due EXCEPTION; BEGIN ... To handle raised exceptions, you write separate routines called exception handlers. If the exception is ever raised in that block (or any sub-block), you can be sure it will be handled. INVALID_NUMBER 01722 -1722 n 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 click site
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. Think of it as a way to make Oracle communicate error conditions that your application expects in a "language" (for lack of a better term) that you have defined and is If the exception is ever raised in that block (or any sub-block), you can be sure it will be handled. Although you cannot anticipate all possible errors, you can plan to handle certain kinds of errors meaningful to your PL/SQL program.
Raise Application Error Oracle Example
The optional OTHERS handler catches all exceptions that the block does not name specifically. Raise an exception in a PL/SQL block or subprogram only when an error makes it undesirable or impossible to finish processing. In such cases, you must use dot notation to specify the predefined exception, as follows: EXCEPTION WHEN invalid_number OR STANDARD.INVALID_NUMBER THEN -- handle the error END; How PL/SQL Exceptions Are Raised PROGRAM_ERROR 06501 -6501 PL/SQL has an internal problem.
What is the practical duration of Prestidigitation? BEGIN ---------- sub-block begins ... 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 Oracle Raise SQL> insert into company values(1,1002,'B Inc.','Long Name B Inc.'); 1 row created.
If you recompile the subprogram with an ALTER ... 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. DBMS_OUTPUT.PUT_LINE('Can''t handle an exception in a declaration.'); END; / Handlers in the current block cannot catch the raised exception because an exception raised in a declaration propagates immediately to the enclosing 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
Topics: Declaring PL/SQL Exceptions Scope Rules for PL/SQL Exceptions Associating a PL/SQL Exception with a Number (EXCEPTION_INIT Pragma) Defining Your Own Error Messages (RAISE_APPLICATION_ERROR Procedure) Redeclaring Predefined Exceptions Declaring PL/SQL Exceptions Pragma Exception_init And Raise Application Error 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. Whenever this exception occurs, all the uncommitted transactions in the current session will be rolled back to its previous state. % Note: The error code of the predefined exceptions cannot 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
Within this handler, you can call the functions SQLCODE and SQLERRM to return the Oracle error code and message text. Make sure you pass negative error numbers to SQLERRM. Raise Application Error Oracle Example Sometimes the error is not immediately obvious, and could not be detected until later when you perform calculations using bad data. Difference Between Raise And Raise_application_error In Oracle When you see an error stack, or sequence of error messages, the one on top is the one that you can trap and handle.
Handling Exceptions Raised in Handlers When an exception occurs within an exception handler, that same handler cannot catch the exception. http://vealcine.com/raise-application/raise-application-error-asp-net.php For example, in the Oracle Precompilers environment, any database changes made by a failed SQL statement or PL/SQL block are rolled back. 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. Learn the names and causes of the predefined exceptions. Raise_application_error(-20001
END; Handlers in the current block cannot catch the raised exception because an exception raised in a declaration propagates immediately to the enclosing block. Retrying a Transaction After an exception is raised, rather than abandon your transaction, you might want to retry it. You can avoid such problems by declaring individual variables with %TYPE qualifiers, and declaring records to hold query results with %ROWTYPE qualifiers. navigate to this website This handler is never invoked.
A GOTO statement cannot branch into an exception handler, or from an exception handler into the current block. Raise_application_error Parameters For example, PL/SQL raises the predefined exception NO_DATA_FOUND if a SELECT INTO statement returns no rows. Also, it can use the pragma EXCEPTION_INIT to map specific error numbers returned by raise_application_error to exceptions of its own, as the following Pro*C example shows: EXEC SQL EXECUTE /* Execute
EXCEPTION WHEN NO_DATA_FOUND THEN -- catches all 'no data found' errors Exceptions improve readability by letting you isolate error-handling routines.
The other internal exceptions can be given names. What particular situations do we need to use RAISE_APPLICATION_ERROR? For example, if I have an application calling a stored procedure that adds a user and that user already exists, you'll usually get back an error like: ORA-00001: unique constraint (USERS.PK_USER_KEY) Raise Application Error In Oracle Triggers That way, you can report errors to your application and avoid returning unhandled exceptions.
In the following example, you declare an exception named past_due: DECLARE past_due EXCEPTION; Exception and variable declarations are similar. You can use the pragma EXCEPTION_INIT to associate exception names with other Oracle error codes that you can anticipate. Therefore, DBMS_UTILTY.FORMAT_ERROR_STACK is recommended over SQLERRM, except when using the FORALL statement with its SAVE EXCEPTIONS clause. my review here The categories are: SEVERE: Messages for conditions that might cause unexpected behavior or wrong results, such as aliasing problems with parameters.
TOO_MANY_ROWS A SELECT INTO statement returns more than one row. To have the enclosing block handle the raised exception, you must remove its declaration from the sub-block or define an OTHERS handler. You can have any number of exception handlers, and each handler can associate a list of exceptions with a sequence of statements. 15/74 10 Handling PL/SQL Errors Run-time errors arise from design faults, coding mistakes, hardware failures, and many other sources.
END; Omitting the exception name in a RAISE statement--allowed only in an exception handler--reraises the current exception. For more information about PL/SQL compilation parameters, see PL/SQL Units and Compilation Parameters. NOT_LOGGED_ON Your program issues a database call without being connected to Oracle. The technique is: Encase the transaction in a sub-block.
In that case, change the value that must be unique and continue with the next loop iteration. If the company has zero earnings, the division operation raises the predefined exception ZERO_DIVIDE, the execution of the block is interrupted, and control is transferred to the exception handlers. They might point out something in the subprogram that produces an undefined result or might create a performance problem. Oracle technology is changing and we strive to update our BC Oracle support information.
SUBSCRIPT_BEYOND_COUNT 06533 -6533 A program references a nested table or varray element using an index number larger than the number of elements in the collection. October 8, 2010 at 11:09 AM Anonymous said... ACCESS_INTO_NULL Your program attempts to assign values to the attributes of an uninitialized (atomically null) object. When invoked, raise_application_error ends the subprogram and returns a user-defined error number and message to the application.
Other user-defined exceptions must be raised explicitly, with either RAISE statements or invocations of the procedure DBMS_STANDARD.RAISE_APPLICATION_ERROR.