However, when an exception is raised inside a cursor FOR loop, the cursor is closed implicitly before the handler is invoked. For more information about trace files, see Oracle Database Performance Tuning Guide. Example 11-7 Anonymous Block Avoids ZERO_DIVIDE 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; Because this exception is used internally by some SQL functions to signal completion, you should not rely on this exception being propagated if you raise it within a function that is
Normally, just the failed SQL statement is rolled back, not the whole transaction. ORA-06511 INVALID_CURSOR When you perform an invalid operation on a cursor like closing a cursor, fetch data from a cursor that is not opened. Within this handler, you can call the functions SQLCODE and SQLERRM to return the Oracle error code and message text. To retrieve the message associated with the exception, the exception handler in the anonymous block invokes the SQLERRM function, described in "Error Code and Error Message Retrieval". you could check here
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 To see warnings (and errors) generated during compilation, either query the static data dictionary view *_ERRORS (described in Oracle Database Reference) or, in the SQL*Plus environment, use the command SHOW ERRORS. The pragma must appear somewhere after the exception declaration in the same declarative section, as shown in Example 10-4.
Example 11-4 Locator Variables for Statements that Share Exception Handler CREATE OR REPLACE PROCEDURE loc_var AUTHID DEFINER IS stmt_no POSITIVE; name_ VARCHAR2(100); BEGIN stmt_no := 1; SELECT table_name INTO name_ FROM After the exception handler runs, control transfers to the next statement of the outer block. THEN -- handle the error WHEN OTHERS THEN -- handle all other errors END; If you want two or more exceptions to execute the same sequence of statements, list the exception Pl Sql Exception Handling Best Practices If no exception has been raised, SQLCODE returns zero and SQLERRM returns the message: ORA-0000: normal, successful completion.
For more information, see "Internally Defined Exceptions". Pl Sql Exceptions There is a second log written in the anonymous block, so we end up with two records. NO_DATA_FOUND ORA-01403 The SELECT statement returned no rows or referenced a deleted element in a nested table or referenced an initialized element in an Index-By table. Log_dt/Log_user: Further helpful information are the “who” and “when”.
If the transaction succeeds, commit, then exit from the loop. Functions For Error Trapping Are Contained In Which Section Of A Pl/sql Block The error stack gives us the exact line number where the error occurred. Oracle provides many predefined exceptions in the STANDARD package. Errors are especially likely during arithmetic calculations, string manipulation, and database operations.
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 https://www.techonthenet.com/oracle/exceptions/ TOO_MANY_ROWS A SELECT INTO statement returns more than one row. Pl Sql Exception When Others Error Code and Error Message Retrieval In an exception handler, for the exception being handled: You can retrieve the error code with the PL/SQL function SQLCODE, described in "SQLCODE Function". User Defined Exception In Pl Sql The categories are: SEVERE: Messages for conditions that might cause unexpected behavior or wrong results, such as aliasing problems with parameters.
Unlike variables, exceptions cannot appear in assignment statements or SQL statements. Handling Exceptions Raised in Declarations Exceptions can be raised in declarations by faulty initialization expressions. Therefore, a PL/SQL block cannot handle an exception raised by a remote subprogram. Examples of internally defined exceptions are ORA-00060 (deadlock detected while waiting for resource) and ORA-27102 (out of memory). Raise Application Error In Oracle
Enclosing block: Row inserted. The following block redeclares the predefined exception INVALID_NUMBER. The following example illustrates the programmer-defined exceptions. For the syntax of value_clause, see Oracle Database Reference.
You must raise a user-defined exception explicitly. Raise_application_error Syntax 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); 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.
A GOTO statement cannot branch into an exception handler, or from an exception handler into the current block. SUBSCRIPT_OUTSIDE_LIMIT ORA-06532 Reference to a nested table or varray index outside the declared range (such as -1). In PL/SQL, the pragma EXCEPTION_INIT tells the compiler to associate an exception name with an Oracle error number. Exception Handling In Oracle 11g SUBSCRIPT_BEYOND_COUNT ORA-06533 Reference to a nested table or varray index higher than the number of elements in the collection.
In the exception section, you can check what kind of exception has been occurred and handle it appropriately. stmt := 2; -- designates 2nd SELECT statement SELECT ... When troubleshooting we need the “what”, “where”, “when” and “why”. That is, the exception reproduces itself in successive enclosing blocks until either a block has a handler for it or there is no enclosing block.
Related Topics Anonymous Block DBMS_UTILITY DDL Triggers Instead-Of Triggers Errors Function Procedure System Events System Triggers Table Triggers UTL_LMS Warnings