configure_connection

# File activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb, line 717
        def configure_connection
          if @config[:encoding]
            @connection.set_client_encoding(@config[:encoding])
          end
          self.client_min_messages = @config[:min_messages] || "warning"
          self.schema_search_path = @config[:schema_search_path] || @config[:schema_order]

          # Use standard-conforming strings so we don't have to do the E'...' dance.
          set_standard_conforming_strings

          # If using Active Record's time zone support configure the connection to return
          # TIMESTAMP WITH ZONE types in UTC.
          # (SET TIME ZONE does not use an equals sign like other SET variables)
          if ActiveRecord::Base.default_timezone == :utc
            execute("SET time zone 'UTC'", "SCHEMA")
          elsif @local_tz
            execute("SET time zone '#{@local_tz}'", "SCHEMA")
          end

          # SET statements from :variables config hash
          # http://www.postgresql.org/docs/current/static/sql-set.html
          variables = @config[:variables] || {}
          variables.map do |k, v|
            if v == ":default" || v == :default
              # Sets the value to the global or compile default
              execute("SET SESSION #{k} TO DEFAULT", "SCHEMA")
            elsif !v.nil?
              execute("SET SESSION #{k} TO #{quote(v)}", "SCHEMA")
            end
          end
        end