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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, If one set of values raises an unhandled exception, then PL/SQL rolls back all database changes made earlier in the FORALL statement. You just have to use the RAISE_APPLICATION_ERROR function. That lets you refer to any internal exception by name and to write a specific handler for it. my review here

If there is no enclosing block, then: If the exception handler is in a subprogram, then control returns to the invoker, at the statement after the invocation. To invoke RAISE_APPLICATION_ERROR, use this syntax: RAISE_APPLICATION_ERROR (error_code, message[, {TRUE | FALSE}]); You must have assigned error_code to the user-defined exception with the EXCEPTION_INIT pragma. Once you know the error code, you can use it with pragma EXCEPTION_INIT and write a handler specifically for that error. Example 11-24 Exception Handler Runs and Execution Continues DECLARE sal_calc NUMBER(8,2); BEGIN INSERT INTO employees_temp (employee_id, salary, commission_pct) VALUES (301, 2500, 0); BEGIN SELECT (salary / commission_pct) INTO sal_calc FROM employees_temp https://docs.oracle.com/cd/A97630_01/appdev.920/a96624/07_errs.htm

Sqlerrm In Pl/sql

That way, you can report errors to your application and avoid returning unhandled exceptions. If none of the blocks handle the exception the program ends abruptly with an error. 3) Types of Exception. VALUE_ERROR An arithmetic, conversion, truncation, or size-constraint error occurs.

END; Omitting the exception name in a RAISE statement--allowed only in an exception handler--reraises the current exception. For example, when your program selects a column value into a character variable, if the value is longer than the declared length of the variable, PL/SQL aborts the assignment and raises Continuing after an Exception Is Raised An exception handler lets you recover from an otherwise fatal error before exiting a block. Pl Sql Sqlcode You can have any number of exception handlers, and each handler can associate a list of exceptions with a sequence of statements.

PL/SQL offers two mechanisms for raising an exception: The RAISE statement The RAISE_APPLICATION_ERROR built-in procedure The RAISE statement. Pl Sql Exception Handling Examples In procedural statements, VALUE_ERROR is raised if the conversion of a character string into a number fails. (In SQL statements, INVALID_NUMBER is raised.) ZERO_DIVIDE Your program attempts to divide a number To reraise an exception, simply place a RAISE statement in the local handler, as shown in the following example: DECLARE out_of_balance EXCEPTION; BEGIN ... http://www.oracle.com/technetwork/issue-archive/2012/12-mar/o22plsql-1518275.html WHEN OTHERS THEN -- optional handler for all other errors sequence_of_statements3 END; To catch raised exceptions, you write exception handlers.

The above program displays the name and address of a customer whose ID is given. Error Table In Oracle A cursor must be closed before it can be reopened. 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; Add error-checking code whenever you can predict that an error might occur if your code gets bad input data.

Pl Sql Exception Handling Examples

The salary of some employees is already so large that the new salary amount will violate this constraint, leading Oracle Database to raise the “ORA-01438: value larger than specified precision allowed https://www.techonthenet.com/oracle/exceptions/sqlerrm.php PL/SQL declares predefined exceptions globally in package STANDARD, which defines the PL/SQL environment. Sqlerrm In Pl/sql Otherwise, PL/SQL replaces the error stack with error_code. Oracle Raise Exception With Message However, when an exception is raised inside a cursor FOR loop, the cursor is closed implicitly before the handler is invoked.

Example 11-10 Explicitly Raising Predefined Exception DROP TABLE t; CREATE TABLE t (c NUMBER); CREATE PROCEDURE p (n NUMBER) AUTHID DEFINER IS default_number NUMBER := 0; BEGIN IF n < 0 Next, the example enables all warnings for the session by invoking DBMS_WARNING.set_warning_setting_string and displays the value of PLSQL_WARNINGS by invoking DBMS_WARNING.get_warning_setting_string. SQL aggregate functions such as AVG and SUM always return a value or a null. This code is useful when you need to look up generic information about what might cause such a problem. Oracle Sql Error Code

You cannot use SQLCODE or SQLERRM directly in a SQL statement. The FETCH statement is expected to return no rows eventually, so when that happens, no exception is raised. Take the Challenge! http://setiweb.org/pl-sql/plsql-exception-raise-application-error.php Instead, you should build and call a procedure that does this for you.

Topics Raising User-Defined Exception with RAISE Statement Raising Internally Defined Exception with RAISE Statement Reraising Current Exception with RAISE Statement Raising User-Defined Exception with RAISE Statement In Example 11-9, the procedure Dml Error Logging In Oracle 11g The error log becomes part of a business transaction. Topics Compile-Time Warnings Overview of Exception Handling Internally Defined Exceptions Predefined Exceptions User-Defined Exceptions Redeclared Predefined Exceptions Raising Exceptions Explicitly Exception Propagation Unhandled Exceptions Error Code and Error Message Retrieval Continuing

The technique is: Encase the transaction in a sub-block.

The exception section starts with the keyword EXCEPTION and then contains one or more WHEN clauses. Place the sub-block inside a loop that repeats the transaction. 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); Functions For Error Trapping Are Contained In Which Section Of A Pl/sql Block To handle other Oracle errors, you can use the OTHERS handler.

The error message. ORA-20001: Unknown Error Specified! - USR-10000: This Doesn't Exist!! WHEN OTHERS THEN ROLLBACK; END; Because the block in which exception past_due was declared has no handler for it, the exception propagates to the enclosing block. Controlling PL/SQL Warning Messages To let the database issue warning messages during PL/SQL compilation, you set the initialization parameter PLSQL_WARNINGS.

For the message codes of all PL/SQL warnings, see Oracle Database Error Messages. You've executed a FETCH cursor after CLOSING the cursor. Thus, the RAISE statement and the WHEN clause refer to different exceptions. END; Handlers in the current block cannot catch the raised exception because an exception raised in a declaration propagates immediately to the enclosing block.

Test your code with different combinations of bad input data to see what potential errors arise. For example, you might define an exception named insufficient_funds to flag overdrawn bank accounts. The keyword All is a shorthand way to refer to all warning messages. Continuing after an Exception Is Raised An exception handler lets you recover from an otherwise fatal error before exiting a block.

If there are nested PL/SQL blocks like this. You can also treat particular messages as errors instead of warnings. The primary algorithm is not obscured by error recovery algorithms. You declare an exception by introducing its name, followed by the keyword EXCEPTION.

Example 11-7 uses error-checking code to avoid the exception that Example 11-6 handles. See Also: Example 12-13, where a bulk SQL operation continues despite exceptions Retrying Transactions After Handling Exceptions To retry a transaction after handling an exception that it raised, use this technique: However, the same scope rules apply to variables and exceptions. TIMEOUT_ON_RESOURCE A time-out occurs while Oracle is waiting for a resource.

User-defined exceptions can be associated with an internally defined exception (that is, you can give a name to an otherwise unnamed exception) or with an application-specific error. Declaring PL/SQL Exceptions Exceptions can be declared only in the declarative part of a PL/SQL block, subprogram, or package. If, however, you take the quiz at PL/SQL Challenge, you will be entered into a raffle to win an e-book from O’Reilly Media (oreilly.com). The following block redeclares the predefined exception INVALID_NUMBER.