How to fix the Oracle error ORA-29908: missing primary invocation for ancillary operator?

In this post, you’ll learn more about the Oracle ErrorORA-29908: missing primary invocation for ancillary operator with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-29908: missing primary invocation for ancillary operator

Reason for the Error ORA-29908: missing primary invocation for ancillary operator

The primary invocation corresponding to an ancillary operator is missing.

How to fix the Error ORA-29908: missing primary invocation for ancillary operator ?

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

Add the primary invocation with the same label as the ancillary operator.