Finally, catch the exception and link the exception to a user-defined error number in RAISE_APPLICATION_ERROR. Table 11-3 lists the internally defined exceptions that have predefined names. "Internally Defined Exceptions" explains how to give user-declared names to internally defined exceptions. SUBSCRIPT_BEYOND_COUNT ORA-06533 -6533 A program referenced a nested table or varray using an index number larger than the number of elements in the collection. Here you can list down as many as exceptions you want to handle. this page
Usually raised by trying to cram a 6 character string into a VARCHAR2(5) variable ZERO_DIVIDE ORA-01476 Not only would your math teacher not let you do it, computers won't either. Is it possible to change that message? Example 11-8 Redeclared Predefined Identifier DROP TABLE t; CREATE TABLE t (c NUMBER); In the following block, the INSERT statement implicitly raises the predefined exception INVALID_NUMBER, which the exception handler handles. THEN RAISE out_of_balance; -- raise the exception END IF; EXCEPTION WHEN out_of_balance THEN -- handle the error RAISE; -- reraise the current exception END; ------------ sub-block ends EXCEPTION WHEN out_of_balance THEN
Defining Your Own PL/SQL Exceptions PL/SQL lets you define exceptions of your own. TOO_MANY_ROWS ORA-01422 The SQL INTO statement brought back more than one value or row (only one is allowed). Execution of the handler is complete, so the sub-block terminates, and execution continues with the INSERT statement. Databases SQL Oracle / PLSQL SQL Server MySQL MariaDB PostgreSQL SQLite MS Office Excel Access Word Web Development HTML CSS Color Picker Languages C Language More ASCII Table Linux UNIX Java
Place the statement in its own sub-block with its own exception handlers. You can avoid problems by declaring scalar variables with %TYPE qualifiers and record variables to hold query results with %ROWTYPE qualifiers. Raising Internally Defined Exception with RAISE Statement Although the runtime system raises internally defined exceptions implicitly, you can raise them explicitly with the RAISE statement if they have names. Pl/sql Raises An Exception In Which Two Of The Following Cases If earnings are zero, the function DECODE returns a null.
Without exception handlers, you must check for every possible error, everywhere that it might occur, and then handle it. User Defined Exception In Pl Sql When an error occurs, an exception is raised. Because predefined exceptions have names, you can write exception handlers specifically for them. https://docs.oracle.com/cd/E11882_01/timesten.112/e21639/exceptions.htm STORAGE_ERROR ORA-06500 A hardware problem: Either RAM or disk drive.
DECLARE ---------- sub-block begins past_due EXCEPTION; BEGIN ... Which Of The Following Is Not A Type Of Pl/sql Exception For a workaround, see "Defining Your Own Error Messages: Procedure RAISE_APPLICATION_ERROR". name := name || TO_CHAR(suffix); END; -- sub-block ends END LOOP; END; / Result: Try #1 failed; trying again. Example 11-25 Retrying Transaction After Handling Exception DROP TABLE results; CREATE TABLE results ( res_name VARCHAR(20), res_answer VARCHAR2(3) ); CREATE UNIQUE INDEX res_name_ix ON results (res_name); INSERT INTO results (res_name, res_answer)
What is the possible impact of dirtyc0w a.k.a. "dirty cow" bug? http://plsql-tutorial.com/plsql-exception-handling.htm We can provide a name to this exception and handle it in the exception section as given below. Pl Sql Exception Handling Examples A runtime error occurs during program execution, however. Functions For Error Trapping Are Contained In Which Section Of A Pl/sql Block Before starting the transaction, mark a savepoint.
But, according to the scope rules, enclosing blocks cannot reference exceptions declared in a sub-block. this website Example 4-2 Using RAISE statement to trap user-defined exception In this example, the department number 500 does not exist, so no rows are updated in the departments table. Steps to be followed to use user-defined exceptions: • They should be explicitly declared in the declaration section. • They should be explicitly raised in the Execution Section. • They should For user-defined exceptions, SQLCODE returns +1 and SQLERRM returns the message: User-Defined Exception. Pl Sql Exception Handling Best Practices
Figure 11-3 PL/SQL Returns Unhandled Exception Error to Host Environment Description of "Figure 11-3 PL/SQL Returns Unhandled Exception Error to Host Environment" A user-defined exception can propagate beyond its scope (that Exception Part Can Be Defined Twice In Same Block For example, in the Oracle Precompilers environment, any database changes made by a failed SQL statement or PL/SQL block are rolled back. dbms_output.put_line(TO_CHAR(v_TimeStamp, 'DD-MON-YY HH24:MI:SS')); dbms_output.put(' Module: ' || p_Module); dbms_output.put(' Error #' || p_SeqNum || ': '); dbms_output.put_line(v_ErrorMsg); -- Output the call stack.
Can an irreducible representation have a zero character? TOO_MANY_ROWS 01422 -1422 It is raised when s SELECT INTO statement returns more than one row. PL/SQL procedure successfully completed. Exception Handling In Oracle 11g Skip Headers PL/SQL User's Guide and Reference Release 2 (9.2) Part Number A96624-01 Home Book List Contents Index Master Index Feedback 7 Handling PL/SQL Errors There is nothing more exhilarating than
The syntax for declaring an exception is: DECLARE my-exception EXCEPTION; Example: The following example illustrates the concept. If there is no handler for the exception, then PL/SQL returns an unhandled exception error to the invoker or host environment, which determines the outcome (for more information, see "Unhandled Exceptions"). Unlike variables, exceptions cannot appear in assignment statements or SQL statements. see here NOT_LOGGED_ON ORA-01012 Database connection lost.
Errors can also arise from problems that are independent of your code—for example, disk storage or memory hardware failure—but your code still must take corrective action. Example 11-25 uses the preceding technique to retry a transaction whose INSERT statement raises the predefined exception DUP_VAL_ON_INDEX if the value of res_name is not unique. Previous Tutorial: PL/SQL GOTONext Tutorial: PL/SQL Record PL/SQL Quick Start What is PL/SQL PL/SQL Setting Up Basic PL/SQL Tutorial PL/SQL Block Structure PL/SQL Variables PL/SQL Function PL/SQL Procedure PL/SQL Nested Block