(make-instance 'sql-relational-exp
:operator 'in :sub-expressions rest))
-;; (defsql sql-concat (:symbol "||") (&rest rest)
-;; (make-instance 'sql-relational-exp
-;; :operator '\|\| :sub-expressions rest))
-
(defsql sql-concat (:symbol "concat") (&rest rest)
(make-instance 'sql-relational-exp
:operator '\|\| :sub-expressions rest))