new

# File activerecord/lib/active_record/connection_adapters/abstract_adapter.rb, line 60
      def initialize(connection, logger = nil, pool = nil) #:nodoc:
        super()

        @active              = nil
        @connection          = connection
        @in_use              = false
        @instrumenter        = ActiveSupport::Notifications.instrumenter
        @last_use            = false
        @logger              = logger
        @open_transactions   = 0
        @pool                = pool
        @query_cache         = Hash.new { |h,sql| h[sql] = {} }
        @query_cache_enabled = false
        @schema_cache        = SchemaCache.new self
        @visitor             = nil
      end