Definition of new operators doesn't work if defined outside :sxql.operator

[fisxoj]

There are some operators missing from :sxql.operator, so I was trying to use sxql.operator::define-op to add the @@ operator for search in postgres, so I wrote:

(sxql.operator::define-op (:aa sxql.operator::infix-op :sql-op-name "@@"))

Then I was unable to use it in a where clause, it always used the default function application syntax (e.g. @@(field-name plainto_tsquery(?))).

It turns out that this is because, when define-op interns symbols, it doesn't specify a package to intern into, and so it was defining aa-op in :cl-user, then the op wasn't found and used by the query generator.

I know this isn't in the public interface, but it is useful to be able to define operators. I don't know enough about other dialects of sql to know if @@ is supported widely enough to submit a PR to add it to sxql, but maybe just making define-op intern the symbols in :sxql.operator so they are actually usable would be a nice solution.