The 22 predefined exceptions also have a name assigned, which allows for easier, and more readable exception handling. I want to... SQL> and then find out why someone else thought it necessary to disable locking on the affected table.] Oracle does enforce the available error number range, as illustrated below, so existing, If you do not specify a precision, Oracle assumes a precision of 22. http://vbview.net/oracle-error/oracle-error-number-ranges.php
Let's look at the valid range of user-definable error numbers/exceptions and try to clear the clouded air a bit. CREATE TABLE supplier ( supplier_id numeric not null, supplier_name varchar2(50) not null ); In this example, NUMERIC is the same as NUMERIC(22). DECLARE stock_price NUMBER := 9.73; net_earnings NUMBER := 0; pe_ratio NUMBER; BEGIN pe_ratio := CASE net_earnings WHEN 0 THEN NULL ELSE stock_price / net_earnings end; END; / Guidelines for Avoiding and All legitimate Oracle experts publish their Oracle qualifications.
Predefined PL/SQL Exceptions An internal exception is raised implicitly whenever your PL/SQL program violates an Oracle rule or exceeds a system-dependent limit. You can also subscribe without commenting. Examples of internally defined exceptions include division by zero and out of memory. So, any values you assign in that range will work.
For example, when an open host cursor variable is passed to a stored subprogram, the return types of the actual and formal parameters must be compatible. 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, But when the handler completes, the block is terminated. Oracle Exception 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.
Example 10-1 Runtime Error Handling DECLARE stock_price NUMBER := 9.73; net_earnings NUMBER := 0; pe_ratio NUMBER; BEGIN -- Calculation might cause division-by-zero error. Description When you encounter an ORA-01428 error, the following error message will appear: ORA-01428: argument num is out of range Cause You tried to execute a mathematical function but the parameter Scope Rules for PL/SQL Exceptions You cannot declare an exception twice in the same block. Fill in your details below or click an icon to log in: Email (required) (Address never made public) Name (required) Website You are commenting using your WordPress.com account. (LogOut/Change) You are
If there is no enclosing block, control returns to the host environment. Show_alert Function Returns Handling errors Errors will occur, and when they do, it is important that we know about them, and get as much details from them as possible. By default, it is False. 1. Consider the following example: BEGIN ...
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 http://www.dba-oracle.com/t_raise_application_error.htm END; 16. / Result -20001 ORA-20001: Salary is high Script Explanation: Line No. Raise_application_error Oracle The result of the exception when an appropriate employee ID is passed to the bind variable is printed below. 1. Pragma Exception_init Exceptions declared in a block are considered local to that block and global to all its sub-blocks.
For example, the following GOTO statement is illegal: DECLARE pe_ratio NUMBER(3,1); BEGIN DELETE FROM stats WHERE symbol = 'XYZ'; SELECT price / NVL(earnings, 0) INTO pe_ratio FROM stocks WHERE symbol = http://vbview.net/oracle-error/oracle-error-when.php You code the pragma EXCEPTION_INIT in the declarative part of a PL/SQL block, subprogram, or package using the syntax PRAGMA EXCEPTION_INIT(exception_name, -Oracle_error_number); where exception_name is the name of a previously declared 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. Passing the value of 'True' adds the error to the current stack, while the default is 'False'. Explain Numbering Range Default Error In Oracle
The message begins with the Oracle error code. That is one of the reasons why it is important to pass exceptions through to the caller: if an exception is caught and not re-RAISEd, the database will not roll back WHEN OTHERS THEN -- optional handler for all other errors sequence_of_statements3 END; To catch raised exceptions, you write exception handlers. http://vbview.net/oracle-error/oracle-error-help.php raise_application_error(-20001,'Salary is high'); 10.
Make sure you pass negative error numbers to SQLERRM. Pl Sql Raise Exception Often you want to include erroneous details in the body of your error message. If you exit a subprogram successfully, PL/SQL assigns values to OUT parameters.
STORAGE_ERROR 06500 -6500 PL/SQL runs out of memory or memory has been corrupted. WHEN sal_high THEN 13. SQL aggregate functions such as AVG and SUM always return a value or a null. Ora-06512 PROGRAM_ERROR 06501 -6501 PL/SQL has an internal problem.
If the INSERT succeeds, we exit from the loop immediately. Therefore, instead of supplying an error message that says: No such employee ID. However, if you exit with an unhandled exception, PL/SQL does not assign values to OUT parameters (unless they are NOCOPY parameters). his comment is here However, other user-defined exceptions must be raised explicitly by RAISE statements.
Internal exceptions are raised implicitly (automatically) by the run-time system. DECLARE 3. If an error occurs in the sub-block, a local handler can catch the exception. INVALID_NUMBER 01722 -1722 n 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
Also, if a stored subprogram fails with an unhandled exception, PL/SQL does not roll back database work done by the subprogram. These statements complete execution of the block or subprogram; control does not return to where the exception was raised. If an error occurs in the sub-block, a local handler can catch the exception. Create a java stored procedure for the class you loaded into the database.
But when the handler completes, the block is terminated. Figure 7-1 Propagation Rules: Example 1 Text description of the illustration pls81009_propagation_rules_example1.gif Figure 7-2 Propagation Rules: Example 2 Text description of the illustration pls81010_propagation_rules_example2.gif Figure 7-3 Propagation Rules: Example 3 Text For information on managing errors when using BULK COLLECT, see "Handling FORALL Exceptions with the %BULK_EXCEPTIONS Attribute". Within this handler, you can call the functions SQLCODE and SQLERRM to return the Oracle error code and message text.
When you see an error stack, or sequence of error messages, the one on top is the one that you can trap and handle. Exceptions Raised in Declarations Exceptions can be raised in declarations by faulty initialization expressions. Retrieving the Error Code and Error Message: SQLCODE and SQLERRM In an exception handler, you can use the built-in functions SQLCODE and SQLERRM to find out which error occurred and to Each handler consists of a WHEN clause, which specifies an exception, followed by a sequence of statements to be executed when that exception is raised.
Example 10-16 Using the DBMS_WARNING Package to Display Warnings -- When warnings disabled, the following procedure compiles with no warnings CREATE OR REPLACE PROCEDURE unreachable_code AS x CONSTANT BOOLEAN := TRUE; That lets you refer to any internal exception by name and to write a specific handler for it. Errors are especially likely during arithmetic calculations, string manipulation, and database operations.