Beispiel #1
0
func (self *Coordinator) runSingleQuery(user common.User, db string, q *parser.Query, p engine.Processor) error {
	querySpec := parser.NewQuerySpec(user, db, q)

	if ok, err := self.permissions.CheckQueryPermissions(user, db, querySpec); !ok {
		return err
	}

	switch qt := q.Type(); qt {
	// administrative
	case parser.DropContinuousQuery:
		return self.runDropContinuousQuery(user, db, uint32(q.DropQuery.Id))
	case parser.ListContinuousQueries:
		return self.runListContinuousQueries(user, db, p)
	case parser.Continuous:
		return self.runContinuousQuery(user, db, q.GetQueryString())
	case parser.ListSeries:
		return self.runListSeriesQuery(querySpec, p)
	case parser.ListQueries:
		return self.runListQueries(user, db, p)
	// Data queries
	case parser.Delete:
		return self.runDeleteQuery(querySpec, p)
	case parser.DropSeries:
		return self.runDropSeriesQuery(querySpec)
	case parser.Select:
		return self.runQuerySpec(querySpec, p)
	default:
		return fmt.Errorf("Can't handle query %s", qt)
	}
}
Beispiel #2
0
func (self *CoordinatorSuite) TestShouldQuerySequentially(c *C) {
	end := time.Now().Truncate(24 * time.Hour)
	start := end.Add(-7 * 24 * time.Hour)
	shard := cluster.NewShard(1, start, end, "", "", nil)
	shards := []*cluster.ShardData{shard}
	coordinator := NewCoordinator(&configuration.Configuration{
		ClusterMaxResponseBufferSize: 1000,
	}, nil, nil)
	queries := map[string]bool{
		"list series": false,
		"select count(foo) from /.*bar.*/ group by time(1d)": true,
		"select count(foo) from bar":                         true,
		"select foo from bar":                                true,
		"select count(foo) from bar group by baz":            true,
		"select count(foo) from bar group by time(1d)":       false,
		"select count(foo) from bar group by time(3d)":       true,
	}

	for query, result := range queries {
		fmt.Printf("Testing %s\n", query)
		parsedQuery, err := parser.ParseQuery(query)
		c.Assert(err, IsNil)
		c.Assert(parsedQuery, HasLen, 1)
		querySpec := parser.NewQuerySpec(nil, "", parsedQuery[0])
		c.Assert(coordinator.shouldQuerySequentially(shards, querySpec), Equals, result)
	}
}
func (self *ProtobufRequestHandler) handleQuery(request *protocol.Request, conn net.Conn) {
	// the query should always parse correctly since it was parsed at the originating server.
	queries, err := parser.ParseQuery(*request.Query)
	if err != nil || len(queries) < 1 {
		log.Error("Error parsing query: ", err)
		errorMsg := fmt.Sprintf("Cannot find user %s", *request.UserName)
		response := &protocol.Response{
			Type:         protocol.Response_ERROR.Enum(),
			ErrorMessage: &errorMsg,
			RequestId:    request.Id,
		}
		self.WriteResponse(conn, response)
		return
	}
	query := queries[0]
	var user common.User
	if *request.IsDbUser {
		user = self.clusterConfig.GetDbUser(*request.Database, *request.UserName)
	} else {
		user = self.clusterConfig.GetClusterAdmin(*request.UserName)
	}

	if user == nil {
		errorMsg := fmt.Sprintf("Cannot find user %s", *request.UserName)
		response := &protocol.Response{
			Type:         protocol.Response_ERROR.Enum(),
			ErrorMessage: &errorMsg,
			RequestId:    request.Id,
		}
		self.WriteResponse(conn, response)
		return
	}

	shard := self.clusterConfig.GetLocalShardById(*request.ShardId)

	querySpec := parser.NewQuerySpec(user, *request.Database, query)

	responseChan := make(chan *protocol.Response)
	if querySpec.IsDestructiveQuery() {
		go shard.HandleDestructiveQuery(querySpec, request, responseChan, true)
	} else {
		go shard.Query(querySpec, responseChan)
	}
	for {
		response := <-responseChan
		response.RequestId = request.Id
		self.WriteResponse(conn, response)

		switch rt := response.GetType(); rt {
		case protocol.Response_END_STREAM,
			protocol.Response_ERROR:
			return
		case protocol.Response_QUERY:
			continue
		default:
			panic(fmt.Errorf("Unexpected response type: %s", rt))
		}
	}
}