Re: default operator class (PostgreSQL's error?)

Denis Zaitsev <zzz@cd-club.ru> writes:
> ERROR:  data type name_t has no default operator class for access method "btree"

Hm, that looks like it should work.  You sure you marked the opclass
default?  (Check its row in pg_opclass to see.)

Another possibility is that the opclass is in a schema that is not in
your search path --- I can't recall right now whether being in the
search path affects lookup of a default opclass.
        regards, tom lane