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Pl Sql Error Handling

EXCEPTION WHEN OTHERS THEN err_num := SQLCODE; err_msg := SUBSTR(SQLERRM, 1, 100); INSERT INTO errors VALUES (err_num, err_msg); END; The string function SUBSTR ensures that a VALUE_ERROR exception (for truncation) is 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. The message code of a PL/SQL warning has the form PLW-nnnnn. Aliasing problems with parameters PERFORMANCE Condition might cause performance problems. http://setiweb.org/pl-sql/pl-sql-error-handling-example.php

This package stores general error information in the errors table, with detailed call stack and error stack information in the call_stacks and error_stacks tables, respectively. You can also set it for a single compilation by including it as part of the ALTER PROCEDURE ... For user-defined exceptions, SQLCODE returns +1 and SQLERRM returns the message User-Defined Exception unless you used the pragma EXCEPTION_INIT to associate the exception name with an Oracle error number, in which In the following example, you declare an exception named past_due: DECLARE past_due EXCEPTION; Exception and variable declarations are similar. you could check here

SUBSCRIPT_BEYOND_COUNT Your program references a nested table or varray element using an index number larger than the number of elements in the collection. The latter are called exceptions. If there is no enclosing block, control returns to the host environment. Unhandled exceptions can also affect subprograms.

NOT_LOGGED_ON ORA-01012 Database connection lost. LOGIN_DENIED ORA-01017 Invalid name and/or password for the instance. Therefore, a PL/SQL block cannot catch an exception raised by a remote subprogram. INVALID_CURSOR 01001 -1001 A program attempts a cursor operation that is not allowed, such as closing an unopened cursor.

If you store the debugging information in a separate table, do it with an autonomous routine, so that you can commit your debugging information even if you roll back the work Exceptions declared in a block are considered local to that block and global to all its sub-blocks. So, a SELECT INTO statement that calls an aggregate function never raises NO_DATA_FOUND. https://docs.oracle.com/cd/E11882_01/appdev.112/e25519/errors.htm You code the pragma EXCEPTION_INIT in the declarative part of a PL/SQL block, subprogram, or package using the syntax PRAGMA EXCEPTION_INIT(exception_name, -Oracle_error_number); where exception_name is the name of a previously declared

When called, raise_application_error ends the subprogram and returns a user-defined error number and message to the application. For example, if you declare an exception named invalid_number and then PL/SQL raises the predefined exception INVALID_NUMBER internally, a handler written for INVALID_NUMBER will not catch the internal exception. SUBSCRIPT_OUTSIDE_LIMIT Your program references a nested table or varray element using an index number (-1 for example) that is outside the legal range. RAISE_APPLICATION_ERROR is part of package DBMS_STANDARD, and as with package STANDARD, you do not need to qualify references to it.

The runtime system raises predefined exceptions implicitly (automatically). https://www.tutorialspoint.com/plsql/plsql_exceptions.htm Example 10-1 calculates a price-to-earnings ratio for a company. Remember, no matter how severe the error is, you want to leave the database in a consistent state and avoid storing any bad data. Something like: WHEN OTHERS THEN 'Error number ' & Err.Number & ' has happened.' Answer: Yes, you can use SQLCODE function to retrieve the error number and SQLERRM function to retrieve

Passing a zero to SQLERRM always returns the message normal, successful completion. http://setiweb.org/pl-sql/pl-sql-error-handling-best-practices.php The error number and message can be trapped like any Oracle error. After an exception handler runs, the current block stops executing and the enclosing block resumes with the next statement. Who said you didn't learn anything useful in primary school?

If the company has zero earnings, the division operation raises the predefined exception ZERO_DIVIDE and the executable part of the block transfers control to the exception-handling part. For example, you might want to roll back a transaction in the current block, then log the error in an enclosing block. Example 10-8 Scope of an Exception BEGIN DECLARE ---------- sub-block begins past_due EXCEPTION; due_date DATE := trunc(SYSDATE) - 1; todays_date DATE := trunc(SYSDATE); BEGIN IF due_date < todays_date THEN RAISE past_due; navigate to this website Example 11-17 Exception Raised in Exception Handler is Not Handled CREATE PROCEDURE print_reciprocal (n NUMBER) AUTHID DEFINER IS BEGIN DBMS_OUTPUT.PUT_LINE(1/n); -- handled EXCEPTION WHEN ZERO_DIVIDE THEN DBMS_OUTPUT.PUT_LINE('Error:'); DBMS_OUTPUT.PUT_LINE(1/n || ' is

To call RAISE_APPLICATION_ERROR, use the syntax raise_application_error(error_number, message[, {TRUE | FALSE}]); where error_number is a negative integer in the range -20000 .. -20999 and message is a character string up to Next section will give you an example on raising user-defined exception, similar way you can raise Oracle standard exceptions as well. 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.

Internal exceptions are raised implicitly (automatically) by the run-time system.

Example 11-5 Naming Internally Defined Exception DECLARE deadlock_detected EXCEPTION; PRAGMA EXCEPTION_INIT(deadlock_detected, -60); BEGIN ... Table 11-3 PL/SQL Predefined Exceptions Exception Name Error Code ACCESS_INTO_NULL -6530 CASE_NOT_FOUND -6592 COLLECTION_IS_NULL -6531 CURSOR_ALREADY_OPEN -6511 DUP_VAL_ON_INDEX -1 INVALID_CURSOR -1001 INVALID_NUMBER -1722 LOGIN_DENIED -1017 NO_DATA_FOUND +100 NO_DATA_NEEDED -6548 NOT_LOGGED_ON -1012 If you redeclare a global exception in a sub-block, the local declaration prevails. You need not worry about checking for an error at every point it might occur.

Although you cannot anticipate all possible errors, you can plan to handle certain kinds of errors meaningful to your PL/SQL program. Within this handler, you can call the functions SQLCODE and SQLERRM to return the Oracle error code and message text. If you exit a subprogram successfully, PL/SQL assigns values to OUT parameters. http://setiweb.org/pl-sql/pl-sql-error-handling-procedure.php Sometimes you can use error-checking code to avoid raising an exception, as in Example 11-7.

For example, when your program selects a column value into a character variable, if the value is longer than the declared length of the variable, PL/SQL aborts the assignment and raises 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 So, only an OTHERS handler can catch the exception. Only one exception can be raised in a Block and the control does not return to the Execution Section after the error is handled.

For example, if you declare an exception named invalid_number and then PL/SQL raises the predefined exception INVALID_NUMBER internally, a handler written for INVALID_NUMBER will not catch the internal exception. You declare an exception by introducing its name, followed by the keyword EXCEPTION.