"borajetta" <borajetta@hotmail.com> writes:
> I tried to cluster the isbn_table
> cluster isbn_index_code on isbn_table;
> ERROR: duplicate key violates unique constraint "pg_class_oid_index"
Is this repeatable? If so, could you get a debugger stack trace from
the point of the error?
Also, exactly which PG version are you using?
regards, tom lane