I want to drop the primary index of a table, whose name is integ_366.

When I write

alter table Tablename drop constraint integ_366

I get the error message

"index is in use".

Surely I am the only user of the database.

I even rebooted, but the problem stays there.

I need to drop the @#$% index.

Any help ?

TIA

Duilio Foschi