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Execution of the handler is complete, so the sub-block terminates, and execution continues with the INSERT statement. ROWTYPE_MISMATCH 06504 -6504 The host cursor variable and PL/SQL cursor variable involved in an assignment have incompatible return types. For details, see "Raising Exceptions Explicitly". For example, an exception-handling part could have this syntax: EXCEPTION WHEN ex_name_1 THEN statements_1 -- Exception handler WHEN ex_name_2 OR ex_name_3 THEN statements_2 -- Exception handler WHEN OTHERS THEN statements_3 --
As a result, in TimesTen you could execute a SQL statement and see a resulting warning, but if you execute the same statement through PL/SQL you would not see the warning. Figure 11-1 Propagation Rules: Example 1 Description of "Figure 11-1 Propagation Rules: Example 1" Figure 11-2 Propagation Rules: Example 2 Description of "Figure 11-2 Propagation Rules: Example 2" Figure 11-3 Propagation When you see an error stack, or sequence of error messages, the one on top is the one that you can trap and handle. Topics: Exceptions Raised in Declarations Handling Exceptions Raised in Exception Handlers Branching To or from an Exception Handler Retrieving the Error Code and Error Message Catching Unhandled Exceptions Guidelines for Handling
Oracle Raise Exception With Message
LOGIN_DENIED Your program attempts to log on to Oracle with an invalid username and/or password. Thus, the RAISE statement and the WHEN clause refer to different exceptions. 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
Although you cannot anticipate all possible errors, you can plan to handle certain kinds of errors meaningful to your PL/SQL program. Example 11-5 Naming Internally Defined Exception DECLARE deadlock_detected EXCEPTION; PRAGMA EXCEPTION_INIT(deadlock_detected, -60); BEGIN ... THEN RAISE past_due; -- this is not handled END IF; END; ------------- sub-block ends EXCEPTION WHEN past_due THEN -- does not handle RAISEd exception ... Oracle Sql Codes List Handling Raised PL/SQL Exceptions When an exception is raised, normal execution of your PL/SQL block or subprogram stops and control transfers to its exception-handling part, which is formatted as follows: EXCEPTION
So, PL/SQL predefines some common Oracle errors as exceptions. Functions For Error Trapping Are Contained In Which Section Of A Pl/sql Block Handle an exception by trapping it with a handler or propagating it to the calling environment. SQLERRM returns a maximum of 512 bytes, which is the maximum length of an Oracle Database error message (including the error code, nested messages, and message inserts, such as table and For example, here is a procedure with unnecessary code that could be removed.
The anonymous block invokes the procedure to open the cursor variable for the EMPLOYEES table, but fetches from the DEPARTMENTS table, which raises the predefined exception ROWTYPE_MISMATCH. Oracle Sqlcode List RAISE_APPLICATION_ERROR is part of package DBMS_STANDARD, and as with package STANDARD, you need not qualify references to it. PROGRAM_ERROR PL/SQL has an internal problem. The developer raises the exception explicitly.
Functions For Error Trapping Are Contained In Which Section Of A Pl/sql Block
Performance: Messages for conditions that might cause performance problems, such as passing a VARCHAR2 value to a NUMBER column in an INSERT statement. The other internal exceptions can be given names. Oracle Raise Exception With Message Exceptions can be internally defined (by the runtime system) or user defined. Pl Sql Exception Handling Examples Ok, so how do you get started with a Procedure Editor instead of a Worksheet?
Because the exception propagates immediately to the host environment, the exception handler does not handle it. My mission is to help you and your company be more efficient with our database tools. Example 11-4 Using PRAGMA EXCEPTION_INIT DECLARE deadlock_detected EXCEPTION; PRAGMA EXCEPTION_INIT(deadlock_detected, -60); BEGIN NULL; -- Some operation that causes an ORA-00060 error EXCEPTION WHEN deadlock_detected THEN NULL; -- handle the error END; You can avoid unhandled exceptions by coding an OTHERS handler at the topmost level of every PL/SQL program. Pl Sql Sqlcode
A little better, but not as good as it gets You might be wondering why the line number is off. Handling Exceptions Raised in Declarations Exceptions can be raised in declarations by faulty initialization expressions. Retrieving the Error Code and Error Message In an exception handler, you can retrieve the error code with the built-in function SQLCODE. Avoid unhandled exceptions by including an OTHERS exception handler at the top level of every PL/SQL program.
SYS_INVALID_ROWID 01410 -1410 The conversion of a character string into a universal rowid fails because the character string does not represent a valid rowid. Pl Sql Exception Handling Best Practices 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. Exceptions can be internally defined (by the run-time system) or user defined.
The procedure in Example 11-16 has unnecessary code that can be removed.
See Also: Example 5-38, "Collection Exceptions" 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 INVALID_NUMBER ORA-01722 -1722 Conversion of character string to number failed. For example, if you know that the warning message PLW-05003 represents a serious problem in your code, including 'ERROR:05003' in the PLSQL_WARNINGS setting makes that condition trigger an error message (PLS_05003) Sqlerror SET SERVEROUTPUT ON; DECLARE stock_price NUMBER := 9.73; net_earnings NUMBER := 0; pe_ratio NUMBER; BEGIN -- Calculation might cause division-by-zero error.
Redeclaring Predefined Exceptions Remember, PL/SQL declares predefined exceptions globally in package STANDARD, so you need not declare them yourself. The keyword OTHERS cannot appear in the list of exception names; it must appear by itself. Examples of internally defined exceptions are ORA-22056 (value string is divided by zero) and ORA-27102 (out of memory). An internally defined exception does not have a name unless either PL/SQL gives it one (see "Predefined Exceptions") or you give it one.
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 User-defined exceptions must be given names.