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-rw-r--r--lib/arel/algebra/relations/utilities/nil.rb7
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/arel/algebra/relations/utilities/nil.rb b/lib/arel/algebra/relations/utilities/nil.rb
new file mode 100644
index 0000000000..6a9d678c45
--- /dev/null
+++ b/lib/arel/algebra/relations/utilities/nil.rb
@@ -0,0 +1,7 @@
+require 'singleton'
+
+module Arel
+ class Nil < Relation
+ include Singleton
+ end
+end