How to fix the Oracle error DRG-12306: column string is too long for index set columns?

In this post, you’ll learn more about the Oracle ErrorDRG-12306: column string is too long for index set columns with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

DRG-12306: column string is too long for index set columns

Reason for the Error DRG-12306: column string is too long for index set columns

Cause: You specified a column in the column list of an index of an index set which is too long

How to fix the Error DRG-12306: column string is too long for index set columns ?

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

Action: CHAR and VARCHAR2 columns must be 30 bytes or less max length