diff --git a/source/hunt/sql/ast/expr/SQLNCharExpr.d b/source/hunt/sql/ast/expr/SQLNCharExpr.d
index a8959b0..a8a25e2 100755
--- a/source/hunt/sql/ast/expr/SQLNCharExpr.d
+++ b/source/hunt/sql/ast/expr/SQLNCharExpr.d
@@ -43,7 +43,7 @@ public class SQLNCharExpr : SQLTextLiteralExpr {
     }
 
     override public void output(StringBuffer buf) {
-        if ((this.text is null) || (this.text.length == 0)) {
+        if ((this.text is null) || (this.text.value.length == 0)) {
             buf.append("NULL");
             return;
         }
diff --git a/source/hunt/sql/visitor/SQLASTOutputVisitor.d b/source/hunt/sql/visitor/SQLASTOutputVisitor.d
index e6cbed5..0ea4db2 100755
--- a/source/hunt/sql/visitor/SQLASTOutputVisitor.d
+++ b/source/hunt/sql/visitor/SQLASTOutputVisitor.d
@@ -1654,7 +1654,7 @@ public class SQLASTOutputVisitor : SQLASTVisitorAdapter , ParameterizedVisitor,
             return false;
         }
 
-        if ((x.getText() is null) || (x.getText().length == 0)) {
+        if ((x.getText() is null) || (x.getText().value.length == 0)) {
             print0(ucase ? "NULL" : "null");
         } else {
             print0(ucase ? "N'" : "n'");