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Consider using a cursor.'); > END; > / Your SELECT statement retrieved multiple rows. For simplicitys sake in the code block below I am simply outputting the exception code and error message to the console. Suppose I write a block of code that performs two data manipulation language (DML) operations: Remove all employees from the Employees table who are in department 20. BEGIN ---------- sub-block begins ...

If an error occurs in the sub-block, a local handler can catch the exception. If you exit a subprogram successfully, PL/SQL assigns values to OUT parameters. 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 If a rollback is performed because of the error, the INSERT into the log table will also be rolled back.

The other internal exceptions can be given names. If there is no enclosing block, control returns to the host environment. Subsequent calls to SQLCODE and SQLERRM will return these values. Instead I’ll see an unhandled exception: ORA-06502: PL/SQL: numeric or value error: number precision too large ORA-06512: at line 2 Consequently, you should avoid assigning values to variables in the

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. You can, instead, assign the value in the executable section, and then the exception handler can trap and record the error: DECLARE l_number NUMBER (1); BEGIN l_number := 100; statement1; ... I catch the error and display the number of rows in the Employees table WHERE department_id = 20. “0” is displayed, because the failure of the UPDATE statement did not cause Example 10-12 Continuing After an Exception DECLARE sal_calc NUMBER(8,2); BEGIN INSERT INTO employees_temp VALUES (303, 2500, 0); BEGIN -- sub-block begins SELECT salary / commission_pct INTO sal_calc FROM employees_temp WHERE employee_id

Alternatively, you can use the pragma EXCEPTION_INIT to associate exception names with Oracle error codes. If autocommit is enabled and an unhandled exception occurs in TimesTen, the entire transaction is rolled back. A pragma is a compiler directive that is processed at compile time, not at run time. PROGRAM_ERROR PL/SQL has an internal problem.

The RAISE_APPLICATION_ERROR procedure raises the error, using error number -20201. The keyword OTHERS cannot appear in the list of exception names; it must appear by itself. 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 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

Errors are especially likely during arithmetic calculations, string manipulation, and database operations. Running this in TimesTen results in the following. END; The enclosing block does not handle the raised exception because the declaration of past_due in the sub-block prevails. The RAISE statement raises an exception, stopping the current block from continuing.

You can avoid unhandled exceptions by coding an OTHERS handler at the topmost level of every PL/SQL program. However, the code block below does not work (I am experiencing a "found / expecting" syntax error) CREATE OR REPLACE PROCEDURE DBP.TESTING_SP AS DECLARE v_code NUMBER; v_errm VARCHAR2(64); BEGIN UPDATE PS_NE_PHONE_TBL Code Listing 3: Exception handling procedure as autonomous transaction with COMMIT CREATE OR REPLACE PROCEDURE record_error IS PRAGMA AUTONOMOUS_TRANSACTION; l_code PLS_INTEGER := SQLCODE; l_mesg VARCHAR2(32767) := SQLERRM; BEGIN INSERT INTO error_log Instead, you must assign their values to local variables, then use the variables in the SQL statement, as shown in Example 10-11.

For example: EXCEPTION WHEN INVALID_NUMBER THEN INSERT INTO ... -- might raise DUP_VAL_ON_INDEX WHEN DUP_VAL_ON_INDEX THEN ... -- cannot catch the exception END; Branching to or from an Exception Handler A STORAGE_ERROR PL/SQL runs out of memory or memory has been corrupted. Home Book List Contents Index MasterIndex Feedback current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list. NO_DATA_FOUND A SELECT INTO statement returns no rows, or your program references a deleted element in a nested table or an uninitialized element in an index-by table.

Take the Challenge! For example: Command> DECLARE > v_lname VARCHAR2 (15); > BEGIN > SELECT last_name INTO v_lname > FROM employees > WHERE first_name = 'John'; > DBMS_OUTPUT.PUT_LINE ('Last name is :' || v_lname); For further information: Example 4-2 uses SQLERRM and SQLCODE. This is also noted in "TimesTen error messages and SQL codes".

That is, the built-in parameter SELF (which is always the first parameter passed to a MEMBER method) is null. A predefined exception is an internally defined exception that is assigned a name by PL/SQL. Handling Exceptions Raised in Handlers When an exception occurs within an exception handler, that same handler cannot catch the exception. You might store such information in a separate table.

Suppose my error log table looks like this: CREATE TABLE error_log ( ERROR_CODE INTEGER , error_message VARCHAR2 (4000) , backtrace CLOB , callstack CLOB , created_on DATE , created_by VARCHAR2 (30) The exception section starts with the keyword EXCEPTION and then contains one or more WHEN clauses. The quiz questions are shown below and also at PL/SQL Challenge (plsqlchallenge.com). As the following example shows, use of the OTHERS handler guarantees that no exception will go unhandled: EXCEPTION WHEN ...

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 If the argument is omitted, it returns the error message associated with the current value of SQLCODE. If no handler is found, PL/SQL returns an unhandled exception error to the host environment. That is, the exception reproduces itself in successive enclosing blocks until a handler is found or there are no more blocks to search.

Unlike variables, exceptions cannot appear in assignment statements or SQL statements. SUBSCRIPT_BEYOND_COUNT ORA-06533 -6533 A program referenced a nested table or varray using an index number larger than the number of elements in the collection. The functions SQLCODE and SQLERRM are especially useful in the OTHERS handler because they return the Oracle error code and message text. SQLERRM with no argument is useful only in an exception handler.

For more information, see "Retrieving the Error Code and Error Message: SQLCODE and SQLERRM". A cursor FOR loop automatically opens the cursor to which it refers, so your program cannot open that cursor inside the loop.