PLS-00403: expression string cannot be used as an INTO-target of a SELECT or FETCH statement

PLS-00403: expression string cannot be used as an INTO-target of a SELECT or FETCH statement

Cause: A FETCH statement was unable to assign a value to an assignment target in its INTO list because the target is not a legally formed and declared variable. For example, the following assignment is illegal because Jones is a character string, not a variable: FETCH my_cur INTO Jones ;

Action: Check the spelling and declaration of the assignment target. Make sure that the rules for forming variable names are followed.