Guidelines for Avoiding and Handling Exceptions To make your programs as reliable and safe as possible: Use both error-checking code and exception handlers. For more information, see "Predefined Exceptions". TOO_MANY_ROWS 01422 -1422 A SELECT INTO statement returns more than one row. You can find the value of this parameter by issuing SHOW PARAMETER USER_DUMP_DEST. this page
Topics Exception Categories Advantages of Exception Handlers Guidelines for Avoiding and Handling Exceptions Exception Categories The exception categories are: Internally defined The runtime system raises internally defined exceptions implicitly (automatically). Declare is only for anonymous blocks that are not named. TIMEOUT_ON_RESOURCE ORA-00051 -51 Timeout occurred while the database was waiting for a resource. RAISE_APPLICATION_ERROR Procedure You can invoke the RAISE_APPLICATION_ERROR procedure (defined in the DBMS_STANDARD package) only from a stored subprogram or method.
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. For details, see "Error Code and Error Message Retrieval". Predefined A predefined exception is an internally defined exception that PL/SQL has given a name.
The number that SQLCODE returns is negative unless the Oracle error is no data found, in which case SQLCODE returns +100. DUP_VAL_ON_INDEX ORA-00001 -1 Program attempted to insert duplicate values in a column that is constrained by a unique index. For information on managing errors when using BULK COLLECT, see "Handling FORALL Exceptions with the %BULK_EXCEPTIONS Attribute". Oracle Sql Error Codes Non-predefined TimesTen error Any other standard TimesTen error These must be declared in the declarative section of your application.
Errors are especially likely during arithmetic calculations, string manipulation, and database operations. Oracle Sql Codes List You cannot use SQLCODE or SQLERRM directly in a SQL statement. Note: Unreachable code could represent a mistake or be intentionally hidden by a debug flag. Exceptions Raised in Declarations Exceptions can be raised in declarations by faulty initialization expressions.
select * from mytable; < 1 > < 2 > 2 rows found. great post to read For internal exceptions, SQLCODE returns the number of the Oracle error. Sqlerrm In Pl/sql Go to main content 8/14 4 Errors and Exception Handling This chapter describes the flexible error trapping and error handling you can use in your PL/SQL programs. Functions For Error Trapping Are Contained In Which Section Of A Pl/sql Block The outer block does not have an exception handler for C, so PL/SQL returns an unhandled exception error to the host environment.
You just have to use the RAISE_APPLICATION_ERROR function. this website However, if the statement raises an unhandled exception, the host environment determines what is rolled back. If you want execution to resume with the INSERT statement that follows the SELECT INTO statement, then put the SELECT INTO statement in an inner block with its own ZERO_DIVIDE exception The categories are: SEVERE: Messages for conditions that might cause unexpected behavior or wrong results, such as aliasing problems with parameters. Pl Sql Sqlcode
Example 11-15 Exception Raised in Declaration is Not Handled DECLARE credit_limit CONSTANT NUMBER(3) := 5000; -- Maximum value is 999 BEGIN NULL; EXCEPTION WHEN VALUE_ERROR THEN DBMS_OUTPUT.PUT_LINE('Exception raised in declaration.'); END; To work with PL/SQL warning messages, you use the PLSQL_WARNINGS initialization parameter, the DBMS_WARNING package, and the USER/DBA/ALL_PLSQL_OBJECT_SETTINGS views. In Example 11-15, the VALUE_ERROR exception handler is in the same block as the declaration that raises VALUE_ERROR. Get More Info TIMEOUT_ON_RESOURCE ORA-00051 The activity took too long and timed out.
That way, an exception handler written for the predefined exception can process other errors, as Example 10-7 shows: Example 10-7 Using RAISE to Force a Pre-Defined Exception DECLARE acct_type INTEGER := Oracle Sqlcode List Example 11-5 Naming Internally Defined Exception DECLARE deadlock_detected EXCEPTION; PRAGMA EXCEPTION_INIT(deadlock_detected, -60); BEGIN ... Have your exception handlers output debugging information.
Two minor issues on raise_application_error thought: 1) the size of 2nd parameter is limited to 2048 bytes and 2) I'd prefer 3rd parameter to be true (instead of default false) to 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 Summary of Predefined PL/SQL Exceptions An internal exception is raised automatically if your PL/SQL program violates an Oracle rule or exceeds a system-dependent limit. Pl Sql Exception Handling Examples Otherwise, PL/SQL replaces the error stack with error_code.
Error-handling code is isolated in the exception-handling parts of the blocks. The inner block has an exception handler for A, so A does not propagate. There are 3 types of Exceptions. see here Named system exceptions are: 1) Not Declared explicitly, 2) Raised implicitly when a predefined Oracle error occurs, 3) caught by referencing the standard name within an exception-handling routine.
HomeOracle PL/SQL TutorialIntroductionQuery SelectSetInsert Update DeleteSequencesTableTable JoinsViewIndexSQL Data TypesCharacter String FunctionsAggregate FunctionsDate Timestamp FunctionsNumerical Math FunctionsConversion FunctionsAnalytical FunctionsMiscellaneous FunctionsRegular Expressions FunctionsStatistical FunctionsLinear Regression FunctionsPL SQL Data TypesPL SQL StatementsPL SQL OperatorsPL After an exception handler runs, the current block stops executing and the enclosing block resumes with the next statement. If a stored subprogram exits with an unhandled exception, PL/SQL does not roll back database changes made by the subprogram. See Also: Oracle Database PL/SQL Packages and Types Reference for more information about the DBMS_WARNING package Overview of Exception Handling Exceptions (PL/SQL runtime errors) can arise from design faults, coding mistakes,