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For example, Example 10-16 is a procedure with unnecessary code that could be removed. In the following example, if the SELECT INTO statement raises ZERO_DIVIDE, you cannot resume with the INSERT statement: CREATE TABLE employees_temp AS SELECT employee_id, salary, commission_pct FROM employees; DECLARE sal_calc NUMBER(8,2); SELF_IS_NULL ORA-30625 -30625 Program attempted to invoke a MEMBER method, but the object was not initialized. DUP_VAL_ON_INDEX ORA-00001 -1 Program attempted to insert duplicate values in a column that is constrained by a unique index.

Exceptions declared in a block are considered local to that block and global to all its sub-blocks. ora_server_error_depth LOOP dbms_output.put_line(ora_server_error_msg(i) ); END LOOP; dbms_output.put_line( '--------------------' ); END e_trigger; / Simple Error Handling Procedure Function To Identify The User Logged Onto Oracle CREATE OR more hot questions question feed lang-sql about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation 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);

However, if you exit with an unhandled exception, PL/SQL does not assign values to OUT parameters (unless they are NOCOPY parameters). The technique is: Encase the transaction in a sub-block. Burleson Consulting The Oracle of Database Support Oracle Performance Tuning Remote DBA Services Copyright © 1996 - 2016 All rights reserved by Burleson Oracle is the registered trademark of But instead of the body definition shown there, consider the following, which defines hire_employee and num_above_salary but not remove_employee: CREATE OR REPLACE PACKAGE BODY emp_actions AS -- Code for procedure hire_employee:

For a workaround, see "Defining Your Own Error Messages: Procedure RAISE_APPLICATION_ERROR". 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 To handle raised exceptions, you write separate routines called exception handlers. However, when an exception is raised inside a cursor FOR loop, the cursor is closed implicitly before the handler is invoked.

If you want two or more exceptions to execute the same sequence of statements, list the exception names in the WHEN clause, separating them by the keyword OR, as follows: EXCEPTION This will be after the first occurrence of 'name' and the newline. */ v_Index := INSTR(v_CallStack, 'name') + 5; /* Loop through the string, finding each newline. END; Handlers in the current block cannot catch the raised exception because an exception raised in a declaration propagates immediately to the enclosing block. You can make the checking as general or as precise as you like.

This package stores general error information in the errors table, with detailed call stack and error stack information in the call_stacks and error_stacks tables, respectively. Before starting the transaction, mark a savepoint. For simplicitys sake in the code block below I am simply outputting the exception code and error message to the console. This uses less code and preserves the real line number of the error. –Jon Heller Sep 8 '12 at 4:17 add a comment| 1 Answer 1 active oldest votes up vote

This avoids compilation errors. After an exception handler runs, the current block stops executing and the enclosing block resumes with the next statement. The results were that everything was stored in the table except the 'bad' lines. WHEN OTHERS THEN -- handles all other errors ROLLBACK; END; -- exception handlers and block end here The last example illustrates exception handling, not the effective use of INSERT statements.

The pragma must appear somewhere after the exception declaration in the same declarative section, as shown in Example 10-4. INVALID_NUMBER ORA-01722 It isn't a number, even though you are treating it like one to trying to turn it into one. User-defined error Error defined and raised by the application These must be declared in the declarative section. EXCEPTION WHEN NO_DATA_FOUND THEN -- catches all 'no data found' errors Exceptions improve readability by letting you isolate error-handling routines.

The stored procedure also had no error trap. For example, in the Oracle Precompilers environment, any database changes made by a failed SQL statement or PL/SQL block are rolled back. 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. SUBSCRIPT_OUTSIDE_LIMIT ORA-06532 Reference to a nested table or varray index outside the declared range (such as -1).

Also see "Unsupported predefined errors". This function should only be used within the Exception Handling section of your code. Tried to open a cursor that was already open DUP_VAL_ON_INDEX ORA-00001 An attempt to insert or update a record in violation of a primary key or unique constraint INVALID_CURSOR ORA-01001 The of the atom whose 1s electron moves nearly at the speed of light?

WHEN OTHERS THEN -- optional handler sequence_of_statements3 END; To catch raised exceptions, you write exception handlers. 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 Example 10-11 Displaying SQLCODE and SQLERRM CREATE TABLE errors (code NUMBER, message VARCHAR2(64), happened TIMESTAMP); DECLARE name employees.last_name%TYPE; v_code NUMBER; v_errm VARCHAR2(64); BEGIN SELECT last_name INTO name FROM employees WHERE employee_id 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

Once the exception name is lost, only an OTHERS handler can catch the exception. See also Example 5-38, "Collection Exceptions". Exceptions also improve reliability. END; You can still handle an exception for a statement, then continue with the next statement.

If you recompile the subprogram with a CREATE OR REPLACE statement, the current settings for that session are used. Unhandled exceptions can also affect subprograms. COMPILE statement. Thus, a block or subprogram can have only one OTHERS handler.

You can place RAISE statements for a given exception anywhere within the scope of that exception. Thus HandleAll should have been called with p_Top = TRUE. */ PROCEDURE StoreStacks(p_Module IN errors.module%TYPE, p_SeqNum OUT errors.seq_number%TYPE, p_CommitFlag BOOLEAN DEFAULT FALSE); END ErrorPkg; / Error Handling Package Body CREATE OR Table 4-1 Predefined exceptions Exception name Oracle Database error number SQLCODE Description ACCESS_INTO_NULL ORA-06530 -6530 Program attempted to assign values to the attributes of an uninitialized object. NO_DATA_FOUND ORA-01403 +100 Single row SELECT returned no rows or your program referenced a deleted element in a nested table or an uninitialized element in an associative array (index-by table).

Because a block can reference only local or global exceptions, enclosing blocks cannot reference exceptions declared in a sub-block. Then I reran everything just as in case4, except that the stored procedure was the one with the error trap and unnamed block the one without an error trap. SELECT ... ... 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

Using the DBMS_WARNING Package If you are writing a development environment that compiles PL/SQL subprograms, you can control PL/SQL warning messages by calling subprograms in the DBMS_WARNING package. The facility is the first 3 characters of the error. */ v_Facility := SUBSTR(v_Error, 1, 3); -- Remove the facility and the dash (always 4 characters) Browse other questions tagged oracle stored-procedures plsql or ask your own question. Example 4-3 Using the RAISE_APPLICATION_ERROR procedure This example attempts to delete from the employees table where last_name=Patterson.

You can also set it for a single compilation by including it as part of the ALTER PROCEDURE ... 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. Redeclaring Predefined Exceptions Remember, PL/SQL declares predefined exceptions globally in package STANDARD, so you need not declare them yourself.