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