X-Git-Url: http://git.kpe.io/?a=blobdiff_plain;f=sql%2Fexpressions.lisp;h=7f0ad1f82ff601a6556a8d45080fcb481494ba27;hb=d9937e92697e07d701defd1fdcee7100d005fdf6;hp=2f40e33a6e67f640b107a0a2dc9d444941c9287d;hpb=b5890c31a60303397efedb2110f46c6388426170;p=clsql.git

diff --git a/sql/expressions.lisp b/sql/expressions.lisp
index 2f40e33..7f0ad1f 100644
--- a/sql/expressions.lisp
+++ b/sql/expressions.lisp
@@ -859,11 +859,13 @@ uninclusive, and the args from that keyword to the end."
 
 (let ((keyword-package (symbol-package :foo)))
   (defmethod database-output-sql ((sym symbol) database)
-    (convert-to-db-default-case
-     (if (equal (symbol-package sym) keyword-package)
-	 (concatenate 'string "'" (string sym) "'")
-	 (symbol-name sym))
-     database)))
+  (if (null sym) 
+      +null-string+ 
+      (convert-to-db-default-case
+       (if (equal (symbol-package sym) keyword-package)
+           (concatenate 'string "'" (string sym) "'")
+           (symbol-name sym))
+       database))))
 
 (defmethod database-output-sql ((tee (eql t)) database)
   (declare (ignore database))