Oracle/PLSQL: Named System Exceptions


Named system exceptions are exceptions that have been given names by PL/SQL. They are named in the STANDARD package in PL/SQL and do not need to be defined by the programmer.

Oracle has a standard set of exceptions already named as follows:

Oracle Exception Name Oracle Error Explanation
DUP_VAL_ON_INDEX ORA-00001 You tried to execute an INSERT or UPDATE statement that has created a duplicate value in a field restricted by a unique index.
TIMEOUT_ON_RESOURCE ORA-00051 You were waiting for a resource and you timed out.
TRANSACTION_BACKED_OUT ORA-00061 The remote portion of a transaction has rolled back.
INVALID_CURSOR ORA-01001 You tried to reference a cursor that does not yet exist. This may have happened because you’ve executed a FETCH cursor or CLOSE cursor before OPENing the cursor.
NOT_LOGGED_ON ORA-01012 You tried to execute a call to Oracle before logging in.
LOGIN_DENIED ORA-01017 You tried to log into Oracle with an invalid username/password combination.
NO_DATA_FOUND ORA-01403 You tried one of the following:

 

  1. You executed a SELECT INTO statement and no rows were returned.
  2. You referenced an uninitialized row in a table.
  3. You read past the end of file with the UTL_FILE package.
TOO_MANY_ROWS ORA-01422 You tried to execute a SELECT INTO statement and more than one row was returned.
ZERO_DIVIDE ORA-01476 You tried to divide a number by zero.
INVALID_NUMBER ORA-01722 You tried to execute an SQL statement that tried to convert a string to a number, but it was unsuccessful.
STORAGE_ERROR ORA-06500 You ran out of memory or memory was corrupted.
PROGRAM_ERROR ORA-06501 This is a generic “Contact Oracle support” message because an internal problem was encountered.
VALUE_ERROR ORA-06502 You tried to perform an operation and there was a error on a conversion, truncation, or invalid constraining of numeric or character data.
CURSOR_ALREADY_OPEN ORA-06511 You tried to open a cursor that is already open.

The syntax for the Named System Exception in a procedure is:

CREATE [OR REPLACE] PROCEDURE procedure_name
[ (parameter [,parameter]) ]
IS
[declaration_section]
BEGIN
executable_section
EXCEPTION
WHEN exception_name1 THEN
[statements]
WHEN exception_name2 THEN
[statements]
WHEN exception_name_n THEN
[statements]
WHEN OTHERS THEN
[statements]
END [procedure_name];

The syntax for the Named System Exception in a function is:

CREATE [OR REPLACE] FUNCTION function_name
[ (parameter [,parameter]) ]
RETURN return_datatype
IS | AS
[declaration_section]
BEGIN
executable_section
EXCEPTION
WHEN exception_name1 THEN
[statements]
WHEN exception_name2 THEN
[statements]
WHEN exception_name_n THEN
[statements]
WHEN OTHERS THEN
[statements]
END [function_name];

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