How to fix the Oracle error ORA-06559: wrong datatype requested, string, actual datatype is string?

In this post, you’ll learn more about the Oracle ErrorORA-06559: wrong datatype requested, string, actual datatype is string with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-06559: wrong datatype requested, string, actual datatype is string

Reason for the Error ORA-06559: wrong datatype requested, string, actual datatype is string

The sender put different datatype on the pipe than that being requested (package ‘dbms_pipe’). The numbers are: 6 – number, 9 – char, 12 – date.

How to fix the Error ORA-06559: wrong datatype requested, string, actual datatype is string ?

You can fix this error in Oracle by following the below steps

Check that the sender and receiver agree on the number and types of items placed on the pipe.