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Pl Sql Script Error Handling
Browse other questions tagged plsql or ask your own question. 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. PROGRAM_ERROR PL/SQL has an internal problem. 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. http://setiweb.org/pl-sql/pl-sql-error-handling-example.php
Also, if a stored subprogram fails with an unhandled exception, PL/SQL does not roll back database work done by the subprogram. Join them; it only takes a minute: Sign up Try Catch Like Exception Handling In Pl/Sql up vote 8 down vote favorite 3 In a procedure, I want to do logic For more information about PL/SQL units and compiler parameters, see "PL/SQL Units and Compilation Parameters". Some common internal exceptions have predefined names, such as ZERO_DIVIDE and STORAGE_ERROR.
Pl Sql Exception Handling Examples
They can be given a number and a name. We can provide a name to this exception and handle it in the exception section as given below. You can place RAISE statements for a given exception anywhere within the scope of that exception. END; Omitting the exception name in a RAISE statement--allowed only in an exception handler--reraises the current exception.
In Example 11-12, an anonymous block declares an exception named past_due, assigns the error code -20000 to it, and invokes a stored procedure. SYS_INVALID_ROWID The conversion of a character string into a universal rowid fails because the character string does not represent a valid rowid. The optional OTHERS exception handler, which is always the last handler in a block or subprogram, acts as the handler for all exceptions not named specifically. Pl/sql Raises An Exception In Which Two Of The Following Cases 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.
STORAGE_ERROR 06500 -6500It is raised when PL/SQL ran out of memory or memory was corrupted. Pl Sql Exception Handling Continue Loop General Syntax for coding the exception section DECLARE Declaration section BEGIN Exception section EXCEPTION WHEN ex_name1 THEN -Error handling statements WHEN ex_name2 THEN -Error handling statements WHEN Others THEN -Error handling RAISE_APPLICATION_ERROR is part of package DBMS_STANDARD, and as with package STANDARD, you do not need to qualify references to it. https://docs.oracle.com/cd/B13789_01/appdev.101/b10807/07_errs.htm ORA-01422 ZERO_DIVIDE When you attempt to divide a number by zero.
Finally, looking at the first call stack, we find following information: "--- PL/SQL Call Stack --- object line object handle number name 1CA24A88 1 anonymous block 1C9CDCC0 10 procedure SCOTT.LOG_ERROR 1CA121EC User Defined Exception In Pl Sql We cannot foresee all possible problematic events, and even the best programmers write bugs. EDIT: Here is some more detail. When the inner block raises past_due, the exception propagates to the outer block, where the name past_due does not exist.
Pl Sql Exception Handling Continue Loop
The two call stacks are "ORA-01403: no data found" And "ORA-20001: Unhandled exception occured. Therefore, the values of explicit cursor attributes are not available in the handler. Pl Sql Exception Handling Examples 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 Pl Sql Exception Handling Best Practices ZERO_DIVIDE 01476 1476 It is raised when an attempt is made to divide a number by zero.
IF ... get redirected here 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. Can a nuclear detonation on Moon destroy life on Earth? There are some system exceptions which are raised frequently, so they are pre-defined and given a name in Oracle which are known as Named System Exceptions. Functions For Error Trapping Are Contained In Which Section Of A Pl/sql Block
unless you used the pragma EXCEPTION_INIT to associate the exception name with an Oracle error number, in which case SQLCODE returns that error number and SQLERRM returns the corresponding error message. Consider the following example: DECLARE pe_ratio NUMBER(3,1); BEGIN DELETE FROM stats WHERE symbol = 'XYZ'; BEGIN ---------- sub-block begins SELECT price / NVL(earnings, 0) INTO pe_ratio FROM stocks WHERE symbol = For example: DECLARE ex_custom EXCEPTION; BEGIN RAISE ex_custom; EXCEPTION WHEN ex_custom THEN DBMS_OUTPUT.PUT_LINE(SQLERRM); END; / The output is "User-Defined Exception". http://setiweb.org/pl-sql/pl-sql-error-handling.php 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").
WHEN others THEN exception3-handling-statements END; Example Let us write some simple code to illustrate the concept. Pl Sql Exception When Others 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 ... When troubleshooting we need the “what”, “where”, “when” and “why”.
IF number_on_hand < 1 THEN RAISE out_of_stock; END IF; EXCEPTION WHEN out_of_stock THEN -- handle the error END; You can also raise a predefined exception explicitly.
COLLECTION_IS_NULL Your program attempts to apply collection methods other than EXISTS to an uninitialized (atomically null) nested table or varray, or the program attempts to assign values to the elements of WHEN OTHERS THEN -- optional handler sequence_of_statements3 END; To catch raised exceptions, you write exception handlers. User-defined exceptions must be raised explicitly by RAISE statements, which can also raise predefined exceptions. Exception Handling In Oracle Interview Questions Proc1 raises an error, which is caught in proc3, logged, and followed by the raise of a different error.
For more information, see "Internally Defined Exceptions". Example 11-25 uses the preceding technique to retry a transaction whose INSERT statement raises the predefined exception DUP_VAL_ON_INDEX if the value of res_name is not unique. The built-in parameter SELF points to the object, and is always the first parameter passed to a MEMBER method. STORAGE_ERROR PL/SQL runs out of memory or memory has been http://setiweb.org/pl-sql/pl-sql-insert-error-handling.php An application can call raise_application_error only from an executing stored subprogram (or method).
Typically, you invoke this procedure to raise a user-defined exception and return its error code and error message to the invoker. 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