"Jim C. Nasby" <decibel@decibel.org> writes:
> Well, neither of those should take very long at all. What's EXPLAIN
> ANALYZE show?
Indeed ... now I'm wondering about foreign key checks. Are there any
tables with foreign keys linking to usuario? If so, the problem is
likely unindexed foreign key columns, or maybe a datatype mismatch
between foreign key and referenced column.
regards, tom lane