                             table      : table
                             query      : query
                             options    : opts.options
+                            multi      : multi
                             cb         : (err, x) =>
                                 result[table] = x; cb(err)
                         return

            query      : required
            options    : {}
            cb         : required   # cb(err, result)
        result = {}
        f = (table, cb) =>
            query = opts.query[table]
            if typeof(query) == "object"
                for k, v of query
                    if v == null

                    account_id : opts.account_id
                    table      : table
                    query      : query
                    multi      : multi
                    options    : opts.options
                    cb         : (err, x) =>
                        result[table] = x; cb(err)
