InterSystems IRIS SQL Error Code -18 IS (or IS NOT) NULL predicate can be app

In this post, you’ll learn about the SQL error code -18 in InterSystems IRIS database the reason why you are receiving the SQL error message when using the InterSystems IRIS data platform

Error Code :

-18

Reason for the Error code -18 in InterSystems IRIS DBMS

IS (or IS NOT) NULL predicate can be applied only to a field