moved sql related code to its own engine area

Conflicts:

	lib/arel/engine.rb
	lib/arel/extensions/object.rb
	lib/arel/predicates.rb
	lib/arel/primitives/attribute.rb
	lib/arel/primitives/expression.rb
	lib/arel/primitives/value.rb
	lib/arel/relations/operations/join.rb
	lib/arel/relations/relation.rb
	lib/arel/relations/utilities/externalization.rb
	lib/arel/relations/utilities/nil.rb
	lib/arel/relations/writes/delete.rb
	lib/arel/relations/writes/insert.rb
	lib/arel/relations/writes/update.rb
	spec/arel/unit/relations/skip_spec.rb
	spec/arel/unit/relations/take_spec.rb
	spec/spec_helper.rb

2 files changed, 20 insertions, 0 deletions

diff --git a/lib/arel/engines/array/array.rb b/lib/arel/engines/array/array.rb
new file mode 100644
index 0000000000..3a3a47308a
--- /dev/null
+++ b/lib/arel/engines/array/array.rb
@@ -0,0 +1 @@
+require 'arel/engines/array/relations/array'
\ No newline at end of file
diff --git a/lib/arel/engines/array/relations/array.rb b/lib/arel/engines/array/relations/array.rb
new file mode 100644
index 0000000000..dac65abbc2
--- /dev/null
+++ b/lib/arel/engines/array/relations/array.rb
@@ -0,0 +1,19 @@
+module Arel
+  class Array < Relation
+    include Recursion::BaseCase
+
+    def initialize(array, attribute_names)
+      @array, @attribute_names = array, attribute_names
+    end
+
+    def attributes
+      @attributes ||= @attribute_names.collect do |name|
+        Attribute.new(self, name.to_sym)
+      end
+    end
+
+    def call(connection = nil)
+      @array.collect { |row| attributes.zip(row).to_hash }
+    end
+  end
+end
\ No newline at end of file