--- a/Lib/IMPL/SQL/Schema/Table.pm	Fri Jan 25 00:25:02 2013 +0400
+++ b/Lib/IMPL/SQL/Schema/Table.pm	Mon Jan 28 02:43:14 2013 +0400
@@ -36,12 +36,6 @@
            
         $this->InsertColumn($_) foreach @{$args{columns}};
     }
-    
-    if ($args{constraints}) {
-        die new IMPL::InvalidOperationException('A constraints property should be a reference to an array') unless ref $args{constraints} eq 'ARRAY';
-           
-        $this->AddConstraint($_) foreach @{$args{constraints}};
-    }
 }
 
 sub InsertColumn {
@@ -181,6 +175,8 @@
         $type = IMPL::SQL::Schema::Constraint->ResolveAlias($type) or
             die new IMPL::Exception("Can't resolve a constraint alias",$_[0]);
             
+        $params = {%{$params}};
+            
         $params->{table} = $this;
         
         $this->AddConstraint($type->new(%$params));