Once you know the error code, you can use it with pragma EXCEPTION_INIT and write a handler specifically for that error. What am I? However, if you exit with an unhandled exception, PL/SQL does not assign values to OUT parameters (unless they are NOCOPY parameters). CURSOR_ALREADY_OPEN Your program attempts to open an already open cursor. http://applecountry.net/divide-by/divide-by-zero-oracle-error.php
You need not worry about checking for an error at every point it might occur. Defining Your Own PL/SQL Exceptions PL/SQL lets you define exceptions of your own. For example, here is a procedure with unnecessary code that could be removed. How did night fighter aircraft manage to shoot down their foes in World War II? https://docs.oracle.com/cd/A97630_01/appdev.920/a96624/07_errs.htm
For example, PL/SQL raises the predefined exception NO_DATA_FOUND if a SELECT INTO statement returns no rows. oracle plsql share|improve this question edited Mar 14 '14 at 6:08 Nicholas Krasnov 19k42649 asked Mar 14 '14 at 2:21 Borat Sagddiev 842518 v_height is set to 0, why SELF_IS_NULL A program attempts to call a MEMBER method, but the instance of the object type has not been initialized. Therefore, running this code:
Typically, no one thinks to specify that nulls should be excluded. END; The enclosing block does not handle the raised exception because the declaration of past_due in the sub-block prevails. After an exception handler runs, the current block stops executing and the enclosing block resumes with the next statement. Prevent Divide By Zero Sql You cannot return to the current block from an exception handler.
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 Oracle Sql Divide By Zero Error Examples of internally defined exceptions include division by zero and out of memory. Chad Oct 3, 2007 at 3:14 PM 2 Comments Is this function specific to SQL Server or will it work on other databases as well? (Oracle, MySQL, etc.) Ben Nadel Oct Visit Website The following example calculates a price-to-earnings ratio for a company.
Associating a PL/SQL Exception with a Number: Pragma EXCEPTION_INIT To handle error conditions (typically ORA- messages) that have no predefined name, you must use the OTHERS handler or the pragma EXCEPTION_INIT. Pl Sql Exception Handling Examples COMPILE statement, the current session setting might be used, or the original setting that was stored with the subprogram, depending on whether you include the REUSE SETTINGS clause in the statement. Advantages of PL/SQL Exceptions Using exceptions for error handling has several advantages. All rights reserved.
A PL/SQL block cannot catch an exception raised by a remote subprogram. Get More Info 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 A pragma is a compiler directive that is processed at compile time, not at run time. Because a block can reference only local or global exceptions, enclosing blocks cannot reference exceptions declared in a sub-block. Exception No Data Found Oracle
END IF; END; / The calling application gets a PL/SQL exception, which it can process using the error-reporting functions SQLCODE and SQLERRM in an OTHERS handler. Oracle Raise Exception With Message The error number and message can be trapped like any Oracle error. Also, if a stored subprogram fails with an unhandled exception, PL/SQL does not roll back database work done by the subprogram.
Unhandled exceptions can also affect subprograms. If there is no handler for a user-defined exception, the calling application gets this error: ORA-06510: PL/SQL: unhandled user-defined exception Reraising a PL/SQL Exception Sometimes, you want to reraise an exception, SYS_INVALID_ROWID The conversion of a character string into a universal rowid fails because the character string does not represent a valid rowid. TIMEOUT_ON_RESOURCE A time-out occurs while Oracle is Pl Sql Exception When Others If the transaction fails, control transfers to the exception handler, where you roll back to the savepoint undoing any changes, then try to fix the problem.
Hot Network Questions Writing referee report: found major error, now what? 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. The usual scoping rules for PL/SQL variables apply, so you can reference local and global variables in an exception handler. this page The settings for the PLSQL_WARNINGS parameter are stored along with each compiled subprogram.
If no exception has been raised, SQLCODE returns zero and SQLERRM returns the message: ORA-0000: normal, successful completion. If you redeclare a global exception in a sub-block, the local declaration prevails. For example, you might define an exception named insufficient_funds to flag overdrawn bank accounts. You might also use this package when compiling a complex application, made up of several nested SQL*Plus scripts, where different warning settings apply to different subprograms.
For internal exceptions, SQLCODE returns the number of the Oracle error. SQLERRM returns the corresponding error message. I find this to be much more straight forward and readable. The technique is: Encase the transaction in a sub-block.
EXCEPTION WHEN OTHERS THEN err_num := SQLCODE; err_msg := SUBSTR(SQLERRM, 1, 100); INSERT INTO errors VALUES (err_num, err_msg); END; The string function SUBSTR ensures that a VALUE_ERROR exception (for truncation) is ALTER SESSION SET PLSQL_WARNINGS='ENABLE:PERFORMANCE'; -- To focus on one aspect. NOT_LOGGED_ON Your program issues a database call without being connected to Oracle. For user-defined exceptions, SQLCODE returns +1 and SQLERRM returns the message: User-Defined Exception.
Place the sub-block inside a loop that repeats the transaction. thanks, Robert. 13507Views Tags: none (add) This content has been marked as final.