1 files changed, 0 insertions, 50 deletions
diff --git a/lib/arel/engines/sql/compilers/postgresql_compiler.rb b/lib/arel/engines/sql/compilers/postgresql_compiler.rb
deleted file mode 100644
index 3079451064..0000000000
--- a/lib/arel/engines/sql/compilers/postgresql_compiler.rb
+++ /dev/null
@@ -1,50 +0,0 @@
-module Arel
-  module SqlCompiler
-    class PostgreSQLCompiler < GenericCompiler
-
-      def select_sql
-        if !relation.orders.blank? && using_distinct_on?
-          selects = relation.select_clauses
-          joins   = relation.joins(self)
-          wheres  = relation.where_clauses
-          groups  = relation.group_clauses
-          havings = relation.having_clauses
-          orders  = relation.order_clauses
-
-          subquery_clauses = [ "",
-            "SELECT     #{selects.kind_of?(::Array) ? selects.join("") : selects.to_s}",
-            "FROM       #{relation.from_clauses}",
-            joins,
-            ("WHERE     #{wheres.join(' AND ')}" unless wheres.empty?),
-            ("GROUP BY  #{groups.join(', ')}" unless groups.empty?),
-            ("HAVING    #{havings.join(' AND ')}" unless havings.empty?)
-          ].compact.join ' '
-          subquery_clauses << " #{locked}" unless locked.blank?
-
-          build_query \
-            "SELECT * FROM (#{build_query subquery_clauses}) AS id_list",
-            "ORDER BY #{aliased_orders(orders)}",
-            ("LIMIT #{relation.taken}" unless relation.taken.blank? ),
-            ("OFFSET #{relation.skipped}" unless relation.skipped.blank? )
-        else
-          super
-        end
-      end
-
-      def using_distinct_on?
-        relation.select_clauses.any? { |x| x =~ /DISTINCT ON/ }
-      end
-
-      def aliased_orders(orders)
-        # PostgreSQL does not allow arbitrary ordering when using DISTINCT ON, so we work around this
-        # by wrapping the +sql+ string as a sub-select and ordering in that query.
-        order = orders.join(', ').split(/,/).map { |s| s.strip }.reject(&:blank?)
-        order = order.zip((0...order.size).to_a).map { |s,i| "id_list.alias_#{i} #{'DESC' if s =~ /\bdesc$/i}" }.join(', ')
-      end
-
-      def supports_insert_with_returning?
-        engine.connection.send(:postgresql_version) >= 80200
-      end
-    end
-  end
-end