From b93a23827a2244ec730be1b46ec44fb368d00396 Mon Sep 17 00:00:00 2001
From: Aaron Patterson <aaron.patterson@gmail.com>
Date: Tue, 14 Sep 2010 13:39:33 -0700
Subject: adding an EXISTS node, update method will generate an IN clause

---
 lib/arel/visitors/to_sql.rb | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'lib/arel/visitors/to_sql.rb')

diff --git a/lib/arel/visitors/to_sql.rb b/lib/arel/visitors/to_sql.rb
index 2660c7d284..dc65e86219 100644
--- a/lib/arel/visitors/to_sql.rb
+++ b/lib/arel/visitors/to_sql.rb
@@ -41,6 +41,10 @@ module Arel
         ].compact.join ' '
       end
 
+      def visit_Arel_Nodes_Exists o
+        "EXISTS (#{visit o.select_stmt})"
+      end
+
       def visit_Arel_Nodes_Values o
         "VALUES (#{o.expressions.map { |value|
           value.nil? ? 'NULL' : visit(value)
-- 
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