# File lib/memcache/pg_server.rb, line 30
    def get(keys)
      return get([keys])[keys.to_s] unless keys.kind_of?(Array)
      return {} if keys.empty?

      keys = keys.collect {|key| quote(key.to_s)}.join(',')
      sql = %{
        SELECT key, value FROM #{table}
          WHERE key IN (#{keys}) AND #{prefix_clause} AND #{expiry_clause}
      }
      results = {}
      db.query(sql).each do |key, value|
        results[key] = value
      end
      results
    end