Error Handling Function Oracle
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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 in ttIsql Differences in TimesTen: exception exception handling in function in oracle handing and error behavior Understanding exceptions This section provides an overview of exceptions in
Oracle Error Handling Best Practice
PL/SQL programming, covering the following topics: About exceptions Exception types About exceptions An exception is a PL/SQL error that is raised oracle error handling framework during program execution, either implicitly by TimesTen or explicitly by your program. Handle an exception by trapping it with a handler or propagating it to the calling environment. For example, if your SELECT statement returns multiple oracle error handling in stored procedure 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 > WHERE first_name = 'John'; > DBMS_OUTPUT.PUT_LINE ('Last name is :' || v_lname); > END; > / 8507:
Oracle Sql Error Handling
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 to declare these exceptions. They are predefined by TimesTen. TimesTen implicitly raises the error. Non-predefined TimesTen error Any other standard TimesTen error These must be declared in the declarative section of your application. TimesTen implic
Magazine Online 2016 2015 2014 2013 2012 2011 2010 As Published In July/August 2003 TECHNOLOGY: PL/SQL Handling Exceptional Behavior, Part II By Steven Feuerstein Handle plsql error handling PL/SQL exceptions with best practices. In the May/June 2003 issue of Oracle exception no data found oracle Magazine, I offered suggestions for both an overall exception handling strategy and best practices for raising exceptions in
Oracle Sqlerrm
your programs. In this article, I complete my treatment of error handling in PL/SQL, with a look at how best to handle exceptions once they have been raised. For https://docs.oracle.com/cd/E11882_01/timesten.112/e21639/exceptions.htm handling exceptions, there are two main considerations: 1. Deciding which errors should be handled and which can go unhandled in any given block of code. 2. Constructing reusable code elements that allow the handling (and logging) of errors in consistent, useful ways. I touch on both of these topics in the following best-practice recommendations. Handle Exceptions That Cannot http://www.oracle.com/technetwork/issue-archive/o43plsql-089319.html Be Avoided If you are writing a program in which you can predict that a certain error will occur, you should include a handler in your code for that, allowing for a graceful and informative failure. The form this failure takes does not, by the way, necessarily need to be an exception. When writing functions, you may well decide that in the case of certain exceptions, you will want to return a value such as NULL, rather than allow an exception to propagate out of the function. This recommendation is easy to demonstrate with the ubiquitous SELECT INTO lookup query. An error that often occurs is NO_DATA_FOUND , indicating that the query did not identify any rows. In the following function, book_title , I put my SELECT INTO inside a function, but I do not allow the NO_DATA_FOUND exception to propagate out of the function: CREATE OR REPLACE FUNCTION book_title ( isbn_in IN book.isbn%TYPE) RETURN book.title%TYPE IS l_title book.title%TYPE; BEGIN SELECT title INTO l_title FROM book WHERE isbn =isbn_in; RETURN l_rec.title; EXCEPTION WHEN N
Server MySQL MariaDB PostgreSQL SQLite MS Office Excel Access Word Web Development HTML CSS Color Picker Languages C Language More ASCII Table Linux UNIX https://www.techonthenet.com/oracle/exceptions/sqlerrm.php Java Clipart Techie Humor Advertisement Oracle Basics Oracle Advanced Oracle Cursors http://psoug.org/reference/exception_handling.html Oracle Exception Handling Named Programmer-Defined Exception Named System Exception WHEN OTHERS Clause SQLCODE SQLERRM Oracle Foreign Keys Oracle Loops/Conditionals Oracle Transactions Oracle Triggers String/Char Functions Numeric/Math Functions Date/Time Functions Conversion Functions Analytic Functions Advanced Functions NEXT: Declare Cursor Oracle / PLSQL: SQLERRM Function This Oracle error handling tutorial explains how to use the Oracle/PLSQL SQLERRM function with syntax and examples. What does the SQLERRM Function do? The SQLERRM function returns the error message associated with the most recently raised error exception. This function should only be used within the Exception Handling section of your code. Syntax The syntax for the SQLERRM function in oracle error handling Oracle/PLSQL is: SQLERRM Parameters or Arguments There are no parameters or arguments for the SQLERRM function. Note See also the SQLCODE function. Example Since EXCEPTION HANDLING is usually written with the following syntax: EXCEPTION WHEN exception_name1 THEN [statements] WHEN exception_name2 THEN [statements] WHEN exception_name_n THEN [statements] WHEN OTHERS THEN [statements] END [procedure_name]; You could use the SQLERRM function to raise an error as follows: EXCEPTION WHEN OTHERS THEN raise_application_error(-20001,'An error was encountered - '||SQLCODE||' -ERROR- '||SQLERRM); END; Or you could log the error to a table using the SQLERRM function as follows: EXCEPTION WHEN OTHERS THEN err_code := SQLCODE; err_msg := SUBSTR(SQLERRM, 1, 200); INSERT INTO audit_table (error_number, error_message) VALUES (err_code, err_msg); END; NEXT: Declare Cursor Share this page: Advertisement Back to top Home | About Us | Contact Us | Testimonials | Donate While using this site, you agree to have read and accepted our Terms of Service and Privacy Policy. We use advertisements to support this website and fund the development of new content.
Functions PSOUG Forum Oracle Blogs Search the Reference Library pages: FreeOracle MagazineSubscriptionsand Oracle White Papers Oracle Exception Handling Version 11.1 General NOTE: How Oracle Does Implicit Rollbacks Before executing an INSERT, UPDATE, or DELETE statement, Oracle marks an implicit savepoint (unavailable to you). If the statement fails, Oracle rolls back to the savepoint. Normally, just the failed SQL statement is rolled back, not the whole transaction. However, if the statement raises an unhandled exception, the host environment determines what is rolled back. If you exit a stored subprogram with an unhandled exception, PL/SQL does not assign values to OUT parameters. Also, PL/SQL does not roll back database work done by the subprogram. At the level of the SQL*Plus prompt, every update/insert/delete has one implicit savepoint, and also the invocation of any unnamed block. Below that, the unnamed block itself has 'sub' savepoints - one foreach insert/update/delete statement in it, and one for each subprogram unit. And so on down the line. If an error occurs, and that error is handled at any level by the time we're back at the SQL*Plus prompt, we only rollback to the immediate savepoint at the start of the update/insert/delete that errors. Otherwise we rollback to the top-level 'virtual' savepoint currently in existence, which is my offending unnamed block. That is, a handled error is handled and so can be dealt with without rolling back all the way to the top. It is handled and the transaction proceeds. Commits define the end of a transaction (and start of a new one) - rollbacks only define the end of a transaction if they rollback to the last commit, rather than savepoint (whether explicit or implicit). I came to my 'version' from the following by no means exhaustive tests: CASE 1: I created a table a with one column, a1 number, and at the sqlplus prompt inserted a row with a1 = 1. I then ran that unnamed block I referred in an earlier post that, without an exception handler, does the following: IN