allow inserts without explicit column list

ssql.scm

@@ -107,14 +107,23 @@
                                                         values)
                                                    ", ")))
 
-               ((insert (('into table) ('columns columns ...) values ...))
-                (sprintf "INSERT INTO ~A (~A) VALUES ~A" 
-                         table
-                         (string-intersperse (map symbol->string columns) ", ")
+               ((insert into values)
+                (sprintf "INSERT INTO ~A VALUES ~A"
+                         into
                          (string-intersperse (map (lambda (val) 
                                                     (self (car val) (cdr val)))
                                                   values) ", ")))
 
+               ((insert (('into table) ('columns columns ...) values ...))
+                (self 'insert
+                      (sprintf "~A (~A)" 
+                               table
+                               (string-intersperse (map symbol->string columns) ", "))
+                      values))
+
+               ((insert (('into table) values ...))
+                (self 'insert table values))
+
                ((operator->sql type operator separator operands)
                 (case type
                   ((infix)

tests/ansi-test.scm

@@ -43,7 +43,15 @@
                            (values "Dr. Hasenbein"
                                    (select (columns id) (from movies) (where (= title "Praxis Dr. Hasenbein")))
                                    (select (columns id) (from actors) (where (and (= firstname "Helge")
-                                                                                  (= lastname "Schneider")))))))))
+                                                                                  (= lastname "Schneider"))))))))
+
+  (test "multiple records"
+    "INSERT INTO actors (firstname, lastname) VALUES ('Sylvester', 'Stallone'), ('Arnold', 'Schwarzenegger')"
+    (ssql->sql #f '(insert (into actors) (columns firstname lastname) (values "Sylvester" "Stallone") (values "Arnold" "Schwarzenegger"))))
+
+  (test "without explicit columns"
+    "INSERT INTO actors VALUES ('Marlon', 'Brando')"
+    (ssql->sql #f '(insert (into actors) (values "Marlon" "Brando")))))
 
 (test-group "syntax"
   (test "set literals"