Each handler consists of a WHEN clause, which specifies an exception, followed by a sequence of statements to be executed when that exception is raised. SUBSCRIPT_OUTSIDE_LIMIT ORA-06532 Reference to a nested table or varray index outside the declared range (such as -1). The invoker does not handle the exception, so PL/SQL returns an unhandled exception error to the host environment. For more information, see ALTER FUNCTION, ALTER PACKAGE, and ALTER PROCEDURE in Oracle Database SQL Reference. this page
Exceptions can be internally defined (by the run-time system) or user defined. You can pass an error number to SQLERRM, in which case SQLERRM returns the message associated with that error number. After an exception handler runs, the current block stops executing and the enclosing block resumes with the next statement. The maximum length of an Oracle error message is 512 characters including the error code, nested messages, and message inserts such as table and column names. https://docs.oracle.com/cd/A97630_01/appdev.920/a96624/07_errs.htm
The inner block does not have an exception handler for C, so exception C propagates to the outer block. THEN -- handle the error WHEN ... Declaring PL/SQL Exceptions Exceptions can be declared only in the declarative part of a PL/SQL block, subprogram, or package. In this case as expected, no error message was generated, and when I selected * from the table, it had inserted all the rows that were valid and only failed to
BEGIN ---------- sub-block begins ... Make the last statement in the OTHERS exception handler either RAISE or an invocation of the RAISE_APPLICATION_ERROR procedure. (If you do not follow this practice, and PL/SQL warnings are enabled, then The result was exactly the same as in case3 - everything was stored except 'bad' rows. Sometimes you can use error-checking code to avoid raising an exception, as in Example 11-7.
Example 11-22 Displaying SQLCODE and SQLERRM Values DROP TABLE errors; CREATE TABLE errors ( code NUMBER, message VARCHAR2(64) ); CREATE OR REPLACE PROCEDURE p AUTHID DEFINER AS name EMPLOYEES.LAST_NAME%TYPE; v_code NUMBER; Place the sub-block inside a loop that repeats the transaction. Jobs Send18 Whiteboard Net Meeting Tools Articles Facebook Google+ Twitter Linkedin YouTube Home Tutorials Library Coding Ground Tutor Connect Videos Search PL/SQL Tutorial PL/SQL - Home PL/SQL - Overview PL/SQL - look at this web-site To have the enclosing block handle the raised exception, you must remove its declaration from the sub-block or define an OTHERS handler.
However, when an exception is raised inside a cursor FOR loop, the cursor is closed implicitly before the handler is invoked. Example 11-14 Exception that Propagates Beyond Scope is Not Handled BEGIN DECLARE past_due EXCEPTION; due_date DATE := trunc(SYSDATE) - 1; todays_date DATE := trunc(SYSDATE); BEGIN IF due_date < todays_date THEN RAISE ORA-06511 INVALID_CURSOR When you perform an invalid operation on a cursor like closing a cursor, fetch data from a cursor that is not opened. You can avoid problems by declaring scalar variables with %TYPE qualifiers and record variables to hold query results with %ROWTYPE qualifiers.
The technique is: Encase the transaction in a sub-block. https://www.tutorialspoint.com/plsql/plsql_exceptions.htm SUBSCRIPT_BEYOND_COUNT ORA-06533 Reference to a nested table or varray index higher than the number of elements in the collection. Also, if a stored subprogram fails with an unhandled exception, PL/SQL does not roll back database work done by the subprogram. LOGIN_DENIED 01017 -1017 It is raised when s program attempts to log on to the database with an invalid username or password.
NOT_LOGGED_ON ORA-01012 Database connection lost. http://back2cloud.com/pl-sql/pl-sql-error-handling-framework.php STORAGE_ERROR ORA-06500 A hardware problem: Either RAM or disk drive. An exception name declaration has this syntax: exception_name EXCEPTION; For semantic information, see "Exception Declaration". You can make the checking as general or as precise as you like.
Guidelines for Avoiding and Handling Exceptions To make your programs as reliable and safe as possible: Use both error-checking code and exception handlers. SELF_IS_NULL 30625 -30625 It is raised when a member method is invoked, but the instance of the object type was not initialized. For more information about PL/SQL units and compiler parameters, see "PL/SQL Units and Compilation Parameters". Get More Info With PL/SQL, a mechanism called exception handling lets you bulletproof your program so that it can continue operating in the presence of errors.
Write out debugging information in your exception handlers. Finally, the example recompiles the procedure, and the compiler generates a warning about the unreachable code. SQLERRM returns the corresponding error message.
SYS_INVALID_ROWID ORA-01410 The conversion of a character string into a universal rowid fails because the character string does not represent a valid rowid. LOOP -- could be FOR i IN 1..10 LOOP to allow ten tries BEGIN -- sub-block begins SAVEPOINT start_transaction; -- mark a savepoint /* Remove rows from a table of survey In the following example, if the SELECT INTO statement raises ZERO_DIVIDE, you cannot resume with the INSERT statement: DECLARE pe_ratio NUMBER(3,1); BEGIN DELETE FROM stats WHERE symbol = 'XYZ'; SELECT price An exception handler for a named internally defined exception handles that exception whether it is raised implicitly or explicitly.
The inner block raises the exception, and its exception handler does the initial handling and then reraises the exception, passing it to the outer block for further handling. Scope Rules for PL/SQL Exceptions You cannot declare an exception twice in the same block. ROWTYPE_MISMATCH 06504 -6504 It is raised when a cursor fetches value in a variable having incompatible data type. see here LOGIN_DENIED ORA-01017 Invalid name and/or password for the instance.
a) Named System Exceptions b) Unnamed System Exceptions c) User-defined Exceptions a) Named System Exceptions System exceptions are automatically raised by Oracle, when a program violates a RDBMS rule. When an error occurs, an exception is raised. Make sure you pass negative error numbers to SQLERRM. But when the handler completes, the block is terminated.