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-rw-r--r--lib/arel/nodes/sum.rb12
1 files changed, 12 insertions, 0 deletions
diff --git a/lib/arel/nodes/sum.rb b/lib/arel/nodes/sum.rb
new file mode 100644
index 0000000000..ecd66aba7a
--- /dev/null
+++ b/lib/arel/nodes/sum.rb
@@ -0,0 +1,12 @@
+module Arel
+ module Nodes
+ class Sum
+ attr_accessor :expressions, :alias
+
+ def initialize expr, aliaz = nil
+ @expressions = expr
+ @alias = aliaz
+ end
+ end
+ end
+end