adding maximum nodes

1 files changed, 22 insertions, 0 deletions

diff --git a/lib/arel/nodes/max.rb b/lib/arel/nodes/max.rb
new file mode 100644
index 0000000000..1766c56058
--- /dev/null
+++ b/lib/arel/nodes/max.rb
@@ -0,0 +1,22 @@
+module Arel
+  module Nodes
+    class Max
+      attr_accessor :expressions, :alias
+
+      def initialize expr, aliaz = nil
+        @expressions = expr
+        @alias       = aliaz
+      end
+
+      def as aliaz
+        self.alias = SqlLiteral.new(aliaz)
+        self
+      end
+
+      def to_sql
+        viz = Visitors::ToSql.new Table.engine
+        viz.accept self
+      end
+    end
+  end
+end