how to pass 'is not null' through prompt into a direct database request using presentation variable?
i am trying the below format which is working for other operators like '<','>' and user can input values which will passed through another presentation variable but is not working for 'is not null'
and column1 '@{p_variable}{is not null}' DECODE('@{p_variable1}','',column1,'@{p_variable1}')
Any help is much appreciated.