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If earnings are zero, the function DECODE returns a null. The latter are called exceptions. Learn the names and causes of the predefined exceptions. It was very useful for my project! –SnakeSheet Jul 31 '14 at 10:49 1 This is a good practice.

Exceptions also improve reliability. In the following example, you declare an exception named past_due: DECLARE past_due EXCEPTION; Exception and variable declarations are similar. Separate them out for insertion. -- Trim white space from the call first. */ v_Call := TRIM(v_Call); -- First get the object handle v_Handle := DECLARE Child_rec_exception EXCEPTION; PRAGMA EXCEPTION_INIT (Child_rec_exception, -2292); BEGIN Delete FROM product where product_id= 104; EXCEPTION WHEN Child_rec_exception THEN Dbms_output.put_line('Child records are present for this product_id.'); END; / c) User-defined Exceptions Apart

Sqlerrm In Pl/sql

Therefore, beyond its scope, a user-defined exception can be handled only with an OTHERS exception handler. Example 11-3 Single Exception Handler for Multiple Exceptions CREATE OR REPLACE PROCEDURE select_item ( t_column VARCHAR2, t_name VARCHAR2 ) AUTHID DEFINER IS temp VARCHAR2(30); BEGIN temp := t_column; -- For error ORA-01422 ZERO_DIVIDE When you attempt to divide a number by zero. Example 11-2 Displaying and Setting PLSQL_WARNINGS with DBMS_WARNING Subprograms Disable all warning messages for this session: ALTER SESSION SET PLSQL_WARNINGS='DISABLE:ALL'; With warnings disabled, this procedure compiles with no warnings: CREATE OR

Design your programs to work when the database is not in the state you expect. IF ... There are two ways to handle unnamed sysyem exceptions: 1. Oracle Raise Exception With Message Special discounts should be provided.

When an exception occurs a messages which explains its cause is recieved. Pl Sql Sqlcode 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. A pragma is a compiler directive that is processed at compile time, not at run time. https://www.techonthenet.com/oracle/exceptions/sqlerrm.php The second parameter accepts a user defined error message of 2048 kb of string at most.

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. Oracle Sqlcode List In this case as expected, no error message was generated, and when I selected * from the table, it had inserted all the rows that were valid and only failed to DECLARE default_number NUMBER := 0; i NUMBER := 5; invalid_number EXCEPTION; -- redeclare predefined exception BEGIN INSERT INTO t VALUES(TO_NUMBER('100.00', '9G999')); EXCEPTION WHEN INVALID_NUMBER THEN DBMS_OUTPUT.PUT_LINE('Substituting default value for invalid number.'); If a stored subprogram exits with an unhandled exception, PL/SQL does not roll back database changes made by the subprogram.

Pl Sql Sqlcode

TOO_MANY_ROWS A SELECT INTO statement returns more than one row. BEGIN RAISE_APPLICATION_ERROR(-20000,’Logical error occured’); END; If we do not care about the error code and error message, and we will foresee an exception block to directly handle the error, we could Sqlerrm In Pl/sql Example 11-8 shows this. Oracle Sql Codes List Regardless of the severity of the error, you want to leave the database in a consistent state and avoid storing bad data.

To invoke RAISE_APPLICATION_ERROR, use this syntax: RAISE_APPLICATION_ERROR (error_code, message[, {TRUE | FALSE}]); You must have assigned error_code to the user-defined exception with the EXCEPTION_INIT pragma. So there seems to have been an invisible savepoint set just before the unnamed block ran. Example 11-12 Raising User-Defined Exception with RAISE_APPLICATION_ERROR CREATE PROCEDURE account_status ( due_date DATE, today DATE ) AUTHID DEFINER IS BEGIN IF due_date < today THEN -- explicitly raise exception RAISE_APPLICATION_ERROR(-20000, 'Account Handling errors Errors will occur, and when they do, it is important that we know about them, and get as much details from them as possible. Functions For Error Trapping Are Contained In Which Section Of A Pl/sql Block

See Also: Example 12-13, where a bulk SQL operation continues despite exceptions Retrying Transactions After Handling Exceptions To retry a transaction after handling an exception that it raised, use this technique: If you specify TRUE, PL/SQL puts error_code on top of the error stack. DECLARE default_number NUMBER := 0; BEGIN INSERT INTO t VALUES(TO_NUMBER('100.00', '9G999')); EXCEPTION WHEN INVALID_NUMBER THEN DBMS_OUTPUT.PUT_LINE('Substituting default value for invalid number.'); INSERT INTO t VALUES(default_number); END; / Result: Substituting default value The number that SQLCODE returns is negative unless the Oracle error is no data found, in which case SQLCODE returns +100.

If there is no enclosing block, control returns to the host environment. Sqlerror I will add another example. –tgxiii May 16 '11 at 16:50 add a comment| 5 Answers 5 active oldest votes up vote 93 down vote accepted Yes. THEN RAISE out_of_balance; -- raise the exception END IF; EXCEPTION WHEN out_of_balance THEN -- handle the error RAISE; -- reraise the current exception END; ------------ sub-block ends EXCEPTION WHEN out_of_balance THEN

COLLECTION_IS_NULL ORA-06531 Attempt to apply collection methods other than EXISTS to an uninitialized (NULL) PL/SQL table or VARRAY.

If you know that your database operations might raise specific internally defined exceptions that do not have names, then give them names so that you can write exception handlers specifically for Handling Exceptions Raised in Declarations Exceptions can be raised in declarations by faulty initialization expressions. The other internal exceptions can be given names. Sqlerrm Line Number a) Named System Exceptions b) Unnamed System Exceptions c) User-defined Exceptions a) Named System Exceptions System exceptions are automatically raised by Oracle, when a program violates a RDBMS rule.

Before starting the transaction, mark a savepoint. Topics RAISE Statement RAISE_APPLICATION_ERROR Procedure RAISE Statement The RAISE statement explicitly raises an exception. Recompile procedure: ALTER PROCEDURE unreachable_code COMPILE; Result: SP2-0805: Procedure altered with compilation warnings Show errors: SHOW ERRORS Result: Errors for PROCEDURE UNREACHABLE_CODE: LINE/COL ERROR -------- ----------------------------------------------------------------- 7/5 PLW-06002: Unreachable code DBMS_WARNING Using the raise_application_error procedure: DECLARE Balance integer := 24; BEGIN IF (nBalance <= 100) THEN Raise_Application_Error (-20343, 'The balance is too low.');END IF;END; In this example, error number -20343 is raised