X-Git-Url: http://git.kpe.io/?p=clsql.git;a=blobdiff_plain;f=sql%2Foperations.lisp;fp=sql%2Foperations.lisp;h=9d8440a474ca8e41ec8fd12d83310a11085736e0;hp=ad785b35ffc28b36e41bf41a070b88333e0abe81;hb=dea46c447f6688f1519a6fbe7f5998d0eab7474c;hpb=3fe77db54b9abecc35bddf084289e359987a5751

diff --git a/sql/operations.lisp b/sql/operations.lisp
index ad785b3..9d8440a 100644
--- a/sql/operations.lisp
+++ b/sql/operations.lisp
@@ -66,7 +66,7 @@
 
 (defsql sql-minus (:symbol "minus") (&rest rest)
   (make-instance 'sql-set-exp 
-		 :operator 'except :sub-expressions rest))
+		 :operator 'minus :sub-expressions rest))
 
 (defsql sql-limit (:symbol "limit") (&rest rest)
   (make-instance 'sql-query-modifier-exp 
@@ -139,16 +139,26 @@
   (make-instance 'sql-relational-exp
                  :operator 'in :sub-expressions rest))
 
-(defsql sql-concat (:symbol "concat") (&rest rest)
+(defsql sql-concat-op (:symbol "concat-op") (&rest rest)
   (make-instance 'sql-relational-exp
 		 :operator '\|\| :sub-expressions rest))
 
+(defsql sql-concat (:symbol "concat") (&rest rest)
+  (make-instance 'sql-function-exp
+		 :name 'concat :args rest))
+
 (defsql sql-substr (:symbol "substr") (&rest rest)
   (if (= (length rest) 3)
       (make-instance 'sql-function-exp 
-		     :name 'substring :args rest)
+		     :name 'substr :args rest)
       (error 'sql-user-error :message "SUBSTR must have 3 arguments.")))
 
+(defsql sql-substring (:symbol "substring") (&rest rest)
+  (if (= (length rest) 3)
+      (make-instance 'sql-function-exp 
+		     :name 'substring :args rest)
+      (error 'sql-user-error :message "SUBSTRING must have 3 arguments.")))
+
 (defsql sql-is (:symbol "is") (&rest rest)
   (make-instance 'sql-relational-exp
 		 :operator 'is :sub-expressions rest))
@@ -224,8 +234,10 @@
 		 :name 'coalesce :args rest))
 
 (defsql sql-nvl (:symbol "nvl") (&rest rest)
-  (make-instance 'sql-function-exp
-		 :name 'coalesce :args rest))
+  (if (= (length rest) 2)      
+      (make-instance 'sql-function-exp
+                     :name 'coalesce :args rest)
+      (error 'sql-user-error :message "NVL accepts exactly 2 arguments.")))
 
 (defsql sql-userenv (:symbol "userenv") (&rest rest)
   (make-instance 'sql-function-exp