The message begins with the Oracle error code. Exception Name Reason Error Number CURSOR_ALREADY_OPEN When you open a cursor that is already open. With a numeric FOR loop, the body of the loop executes once for every integer value between the low and high values specified in the range. Report message to a moderator Re: Error handling inside Cursor [message #573623 is a reply to message #573610] Tue, 01 January 2013 01:35 Michel Cadot Messages: 63912Registered: March this page
ROWTYPE_MISMATCH 06504 -6504 It is raised when a cursor fetches value in a variable having incompatible data type. Place the statement in its own sub-block with its own exception handlers. Once you know the error code, you can use it with pragma EXCEPTION_INIT and write a handler specifically for that error. The syntax for declaring an exception is: DECLARE my-exception EXCEPTION; Example: The following example illustrates the concept. https://docs.oracle.com/cd/B13789_01/appdev.101/b10807/07_errs.htm
In the following example, you alert your PL/SQL block to a user-defined exception named out_of_stock: DECLARE out_of_stock EXCEPTION; number_on_hand NUMBER(4); BEGIN ... Does AAA+BBB+CCC+DDD=ABCD have a solution for distinct digits A,B,C,D? In that case, we change the value that needs to be unique and continue with the next loop iteration.
Place the sub-block inside a loop that repeats the transaction. When the cursor is declared in a declaration section (and not in a package), Oracle Database will also automatically close it when the block in which it is declared terminates. So, the sub-block cannot reference the global exception unless it was declared in a labeled block, in which case the following syntax is valid: block_label.exception_name The following example illustrates the scope Oracle Cursor For Loop The usual scoping rules for PL/SQL variables apply, so you can reference local and global variables in an exception handler.
Continuing after an Exception Is Raised An exception handler lets you recover from an otherwise fatal error before exiting a block. Pl Sql Exception Handling Continue Loop A cursor is a pointer to a private SQL area that stores information about the processing of a SELECT or data manipulation language (DML) statement (INSERT, UPDATE, DELETE, or MERGE). SELECT ... http://www.oracle.com/technetwork/issue-archive/2013/13-mar/o23plsql-1906474.html SQL> SQL> -- prepare data SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values ('01','Jason', 'Martin', to_date('19960725','YYYYMMDD'), to_date('20060725','YYYYMMDD'), 1234.56, 'Toronto', 'Programmer') 3 / 1 row created.
Fetch an entire row from the employees table for a specific employee ID: DECLARE l_employee employees%ROWTYPE; BEGIN SELECT * INTO l_employee FROM employees WHERE employee_id = 138; DBMS_OUTPUT.put_line ( l_employee.last_name); END; Cursor Exceptions In Oracle COLLECTION_IS_NULL Your program attempts to apply collection methods other than EXISTS to an uninitialized (atomically null) nested table or varray, or the program attempts to assign values to the elements of Also, it can use the pragma EXCEPTION_INIT to map specific error numbers returned by raise_application_error to exceptions of its own, as the following Pro*C example shows: EXEC SQL EXECUTE /* Execute a) When we try to open a cursor which is not closed in the previous operation.b) When we try to fetch a cursor after the last operation.
We use these attributes to avoid errors while accessing cursors through OPEN, FETCH and CLOSE Statements. https://www.techonthenet.com/oracle/errors/ora01001.php END; The enclosing block does not handle the raised exception because the declaration of past_due in the sub-block prevails. Pl Sql Exception Handling Examples General Syntax for using FOR LOOP: FOR record_name IN cusror_name LOOP process the row... Oracle Cursor Exception Handling Within A Loop The number that SQLCODE returns is negative unless the Oracle error is no data found, in which case SQLCODE returns +100.
Passing a positive number to SQLERRM always returns the message user-defined exception unless you pass +100, in which case SQLERRM returns the message no data found. If there are nested PL/SQL blocks like this. All Rights Reserved. How to heal religious units? Cursor Example In Oracle
Exceptions can be internally defined (by the runtime system) or user defined. Associating a PL/SQL Exception with a Number: Pragma EXCEPTION_INIT To handle error conditions (typically ORA- messages) that have no predefined name, you must use the OTHERS handler or the pragma EXCEPTION_INIT. For example, in the Oracle Precompilers environment, any database changes made by a failed SQL statement or PL/SQL block are rolled back. Get More Info To have the enclosing block handle the raised exception, you must remove its declaration from the sub-block or define an OTHERS handler.
All rights reserved. Pl Sql Exception Handling Best Practices EXCEPTION_INIT will associate a predefined Oracle error number to a programmer_defined exception name. This is especially handy when you need to use PL/SQL, in addition to SQL, to build the result set.
By using FOR Loop in your program, you can reduce the number of lines in the program. Special discounts should be provided. Just add an exception handler to your PL/SQL block. Ora-01001: Invalid Cursor VALUE_ERROR An arithmetic, conversion, truncation, or size-constraint error occurs.
Within this handler, you can call the functions SQLCODE and SQLERRM to return the Oracle error code and message text. Welcome Account Sign Out Sign In/Register Help Products Solutions Downloads Store Support Training Partners About OTN Oracle Technology Network Oracle Magazine Issue Archive 2013 March 2013 Oracle Magazine Online 2016 2015 IS l_return plch_employees%ROWTYPE; BEGIN SELECT * INTO l_return FROM plch_employees WHERE employee_id = employee_id_in; RETURN l_return; END plch_one_employee; b. see here For internal exceptions, SQLCODE returns the number of the Oracle error.
Scope Rules for PL/SQL Exceptions You cannot declare an exception twice in the same block. Unhandled exceptions can also affect subprograms.