Printing Error Message In Oracle
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to your PL/SQL program. With many programming languages, unless you disable error checking, a run-time error such as stack overflow or division by zero stops normal processing and returns control to the oracle sqlerrm operating system. With PL/SQL, a mechanism called exception handling lets you bulletproof your oracle raise exception with message program so that it can continue operating in the presence of errors. This chapter contains these topics: Overview of PL/SQL oracle sqlcode list Runtime Error Handling Advantages of PL/SQL Exceptions Summary of Predefined PL/SQL Exceptions Defining Your Own PL/SQL Exceptions How PL/SQL Exceptions Are Raised How PL/SQL Exceptions Propagate Reraising a PL/SQL Exception Handling Raised PL/SQL functions for error trapping are contained in which section of a pl/sql block Exceptions Overview of PL/SQL Compile-Time Warnings Overview of PL/SQL Runtime Error Handling In PL/SQL, an error condition is called an exception. Exceptions can be internally defined (by the runtime system) or user defined. Examples of internally defined exceptions include division by zero and out of memory. Some common internal exceptions have predefined names, such as ZERO_DIVIDE and STORAGE_ERROR. The other internal exceptions can be given names. You
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can define exceptions of your own in the declarative part of any PL/SQL block, subprogram, or package. For example, you might define an exception named insufficient_funds to flag overdrawn bank accounts. Unlike internal exceptions, user-defined exceptions must be given names. When an error occurs, an exception is raised. That is, normal execution stops and control transfers to the exception-handling part of your PL/SQL block or subprogram. Internal exceptions are raised implicitly (automatically) by the run-time system. User-defined exceptions must be raised explicitly by RAISE statements, which can also raise predefined exceptions. To handle raised exceptions, you write separate routines called exception handlers. After an exception handler runs, the current block stops executing and the enclosing block resumes with the next statement. If there is no enclosing block, control returns to the host environment. For information on managing errors when using BULK COLLECT, see "Handling FORALL Exceptions with the %BULK_EXCEPTIONS Attribute". Example 10-1 calculates a price-to-earnings ratio for a company. If the company has zero earnings, the division operation raises the predefined exception ZERO_DIVIDE, the execution of the block is interrupted, and control is transferred to the exception handlers. The optional OTHERS handler catches all exceptions that the block
Error Handling" in Oracle Database PL/SQL Language Reference. See the end of this chapter for TimesTen-specific considerations. The following topics are covered: Understanding exceptions Trapping exceptions Showing errors
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in ttIsql Differences in TimesTen: exception handing and error behavior Understanding exceptions This oracle sqlcode values section provides an overview of exceptions in PL/SQL programming, covering the following topics: About exceptions Exception types About exceptions An sqlerrm line number exception is a PL/SQL error that is raised during program execution, either implicitly by TimesTen or explicitly by your program. Handle an exception by trapping it with a handler or propagating it https://docs.oracle.com/cd/B19306_01/appdev.102/b14261/errors.htm to the calling environment. For example, if your SELECT statement returns multiple rows, TimesTen returns an error (exception) at runtime. As the following example shows, you would see TimesTen error 8507, then the associated ORA error message. (ORA messages, originally defined for Oracle Database, are similarly implemented by TimesTen.) Command> DECLARE > v_lname VARCHAR2 (15); > BEGIN > SELECT last_name INTO v_lname > FROM employees > https://docs.oracle.com/cd/E11882_01/timesten.112/e21639/exceptions.htm WHERE first_name = 'John'; > DBMS_OUTPUT.PUT_LINE ('Last name is :' || v_lname); > END; > / 8507: ORA-01422: exact fetch returns more than requested number of rows 8507: ORA-06512: at line 4 The command failed. You can handle such exceptions in your PL/SQL block so that your program completes successfully. For example: Command> DECLARE > v_lname VARCHAR2 (15); > BEGIN > SELECT last_name INTO v_lname > FROM employees > WHERE first_name = 'John'; > DBMS_OUTPUT.PUT_LINE ('Last name is :' || v_lname); > EXCEPTION > WHEN TOO_MANY_ROWS THEN > DBMS_OUTPUT.PUT_LINE (' Your SELECT statement retrieved multiple > rows. Consider using a cursor.'); > END; > / Your SELECT statement retrieved multiple rows. Consider using a cursor. PL/SQL procedure successfully completed. Exception types There are three types of exceptions: Predefined exceptions are error conditions that are defined by PL/SQL. Non-predefined exceptions include any standard TimesTen errors. User-defined exceptions are exceptions specific to your application. In TimesTen, these three types of exceptions are used in the same way as in Oracle Database. Exception Description How to handle Predefined TimesTen error One of approximately 20 errors that occur most often in PL/SQL code You are not required t
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Oracle SQLERRM tips Oracle Database Tips by Burleson Consulting The Oracle SQLERRM function returns the error message associated with the most recently raised error exception. The Oracle SQLERRM function should only be used within the Exception Handling section oracle sql of your PL/SQLcode: The Oracle docs note the syntax for the Oracle SQLERRM function as follows: sqlerrm_function ::=SQLERRM [(error_number)] You can capture error codes caused when a SQL statement raises an exception by using the Oracle SQLERRM globally-defined variablesOracle SQLERRM can help track exceptions that are handled by the OTHERS clauseof the exception handler. Oracle SQLERRM returns printing error message the error message from the current error code as shown below. Here is a working Oracle SQLERRM example: A value greater than 100 will raise an exception using the same function from the previous example. The exception handler caught the OTHERS clause and printed out the Oracle SQLERRM. Once error code has been identified, you can programmatically handle the exception: Oracle SQLERRM example 2: The error message of an error code can be retrieved by passing it to the SQLERRM procedure as like below. The error code -1403 is passed as an input to the SQLERRM procedure resulting in the appropriate error message as shown below, BEGIN dbms_output.put_line(sqlerrm(-1403)); END; Result: ORA-01403: no data found �� Burleson is the American Team Note: This Oracle documentation was created as a support and Oracle training reference for use by ou