Thanks for adding additional value to the blog article with your suggestion. In hindsight I probably should have added another example to this blog article that shows what happens when “WHERE C2 IS NOT NULL” is added to the query.

For those interested, this is a related blog article that shows the effects of adding an “IS NOT NULL” predicate to the WHERE clause.

it would also be sufficient to add “WHERE c2 is not null” to the query and get the index access path without adding a not null constraint to the column.

Regards,
Martin

Thanks for the very nice blog.

Thanks
Aswath Rao