Esempio n. 1
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func emptyTestServer() *httptest.Server {
	return httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("X-Influxdb-Version", SERVER_VERSION)

		switch r.URL.Path {
		case "/query":
			values := r.URL.Query()
			parser := influxql.NewParser(bytes.NewBufferString(values.Get("q")))
			q, err := parser.ParseQuery()
			if err != nil {
				w.WriteHeader(http.StatusInternalServerError)
				return
			}
			stmt := q.Statements[0]

			switch stmt.(type) {
			case *influxql.ShowDatabasesStatement:
				io.WriteString(w, `{"results":[{"series":[{"name":"databases","columns":["name"],"values":[["db"]]}]}]}`)
			case *influxql.ShowDiagnosticsStatement:
				io.WriteString(w, `{"results":[{}]}`)
			}
		case "/write":
			w.WriteHeader(http.StatusOK)
		}
	}))
}
Esempio n. 2
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// MustParseQuery parses an InfluxQL query. Panic on error.
func MustParseQuery(s string) *influxql.Query {
	q, err := influxql.NewParser(strings.NewReader(s)).ParseQuery()
	if err != nil {
		panic(err.Error())
	}
	return q
}
Esempio n. 3
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func BenchmarkMeasurement_SeriesIDForExp_NERegex(b *testing.B) {
	m := tsdb.NewMeasurement("cpu")
	for i := 0; i < 100000; i++ {
		s := tsdb.NewSeries("cpu", models.Tags{models.Tag{
			Key:   []byte("host"),
			Value: []byte(fmt.Sprintf("host%d", i))}})
		s.ID = uint64(i)
		m.AddSeries(s)
	}

	if exp, got := 100000, len(m.SeriesKeys()); exp != got {
		b.Fatalf("series count mismatch: exp %v got %v", exp, got)
	}

	stmt, err := influxql.NewParser(strings.NewReader(`SELECT * FROM cpu WHERE host !~ /foo\d+/`)).ParseStatement()
	if err != nil {
		b.Fatalf("invalid statement: %s", err)
	}

	selectStmt := stmt.(*influxql.SelectStatement)

	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		ids := m.IDsForExpr(selectStmt.Condition.(*influxql.BinaryExpr))
		if exp, got := 100000, len(ids); exp != got {
			b.Fatalf("series count mismatch: exp %v got %v", exp, got)
		}

	}

}
Esempio n. 4
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func BenchmarkQuery_String(b *testing.B) {
	p := influxql.NewParser(strings.NewReader(`SELECT foo AS zoo, a AS b FROM bar WHERE value > 10 AND q = 'hello'`))
	q, _ := p.ParseStatement()
	for i := 0; i < b.N; i++ {
		_ = q.String()
	}
}
Esempio n. 5
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func TestSelectStatement_IsSimpleDerivative(t *testing.T) {
	var tests = []struct {
		stmt       string
		derivative bool
	}{
		// No derivatives
		{
			stmt:       `SELECT value FROM cpu`,
			derivative: false,
		},

		// Query derivative
		{
			stmt:       `SELECT derivative(value) FROM cpu`,
			derivative: true,
		},

		// Query derivative
		{
			stmt:       `SELECT non_negative_derivative(value) FROM cpu`,
			derivative: true,
		},

		// No GROUP BY time only
		{
			stmt:       `SELECT mean(value) FROM cpu where time < now() GROUP BY time(5ms)`,
			derivative: false,
		},

		// No GROUP BY derivatives, time only
		{
			stmt:       `SELECT non_negative_derivative(mean(value)) FROM cpu where time < now() GROUP BY time(5ms)`,
			derivative: false,
		},

		// Invalid derivative function name
		{
			stmt:       `SELECT typoDerivative(value) FROM cpu where time < now()`,
			derivative: false,
		},
	}

	for i, tt := range tests {
		// Parse statement.
		t.Logf("index: %d, statement: %s", i, tt.stmt)
		stmt, err := influxql.NewParser(strings.NewReader(tt.stmt)).ParseStatement()
		if err != nil {
			t.Fatalf("invalid statement: %q: %s", tt.stmt, err)
		}

		// Test derivative detection.
		if d := stmt.(*influxql.SelectStatement).IsSimpleDerivative(); tt.derivative != d {
			t.Errorf("%d. %q: unexpected derivative detection:\n\nexp=%v\n\ngot=%v\n\n", i, tt.stmt, tt.derivative, d)
			continue
		}
	}
}
Esempio n. 6
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func TestSelectStatement_HasCountDistinct(t *testing.T) {
	var tests = []struct {
		stmt  string
		count bool
	}{
		// No counts
		{
			stmt:  `SELECT value FROM cpu`,
			count: false,
		},

		// Query count
		{
			stmt:  `SELECT count(value) FROM cpu`,
			count: false,
		},

		// No GROUP BY time only
		{
			stmt:  `SELECT count(distinct(value)) FROM cpu where time < now() GROUP BY time(5ms)`,
			count: true,
		},

		// Query count
		{
			stmt:  `SELECT typoCount(value) FROM cpu`,
			count: false,
		},

		// No GROUP BY time only
		{
			stmt:  `SELECT typoCount(distinct(value)) FROM cpu where time < now() GROUP BY time(5ms)`,
			count: false,
		},
	}

	for i, tt := range tests {
		// Parse statement.
		t.Logf("index: %d, statement: %s", i, tt.stmt)
		stmt, err := influxql.NewParser(strings.NewReader(tt.stmt)).ParseStatement()
		if err != nil {
			t.Fatalf("invalid statement: %q: %s", tt.stmt, err)
		}

		// Test count detection.
		if c := stmt.(*influxql.SelectStatement).HasCountDistinct(); tt.count != c {
			t.Errorf("%d. %q: unexpected count detection:\n\nexp=%v\n\ngot=%v\n\n", i, tt.stmt, tt.count, c)
			continue
		}
	}
}
Esempio n. 7
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// Test SELECT statement time field rewrite.
func TestSelectStatement_RewriteTimeFields(t *testing.T) {
	var tests = []struct {
		s    string
		stmt influxql.Statement
	}{
		{
			s: `SELECT time, field1 FROM cpu`,
			stmt: &influxql.SelectStatement{
				IsRawQuery: true,
				Fields: []*influxql.Field{
					{Expr: &influxql.VarRef{Val: "field1"}},
				},
				Sources: []influxql.Source{
					&influxql.Measurement{Name: "cpu"},
				},
			},
		},
		{
			s: `SELECT time AS timestamp, field1 FROM cpu`,
			stmt: &influxql.SelectStatement{
				IsRawQuery: true,
				Fields: []*influxql.Field{
					{Expr: &influxql.VarRef{Val: "field1"}},
				},
				Sources: []influxql.Source{
					&influxql.Measurement{Name: "cpu"},
				},
				TimeAlias: "timestamp",
			},
		},
	}

	for i, tt := range tests {
		// Parse statement.
		stmt, err := influxql.NewParser(strings.NewReader(tt.s)).ParseStatement()
		if err != nil {
			t.Fatalf("invalid statement: %q: %s", tt.s, err)
		}

		// Rewrite statement.
		stmt.(*influxql.SelectStatement).RewriteTimeFields()
		if !reflect.DeepEqual(tt.stmt, stmt) {
			t.Logf("\n# %s\nexp=%s\ngot=%s\n", tt.s, mustMarshalJSON(tt.stmt), mustMarshalJSON(stmt))
			t.Logf("\nSQL exp=%s\nSQL got=%s\n", tt.stmt.String(), stmt.String())
			t.Errorf("%d. %q\n\nstmt mismatch:\n\nexp=%#v\n\ngot=%#v\n\n", i, tt.s, tt.stmt, stmt)
		}
	}
}
Esempio n. 8
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// Ensure the SELECT statement can extract GROUP BY interval.
func TestSelectStatement_GroupByInterval(t *testing.T) {
	q := "SELECT sum(value) from foo  where time < now() GROUP BY time(10m)"
	stmt, err := influxql.NewParser(strings.NewReader(q)).ParseStatement()
	if err != nil {
		t.Fatalf("invalid statement: %q: %s", stmt, err)
	}

	s := stmt.(*influxql.SelectStatement)
	d, err := s.GroupByInterval()
	if d != 10*time.Minute {
		t.Fatalf("group by interval not equal:\nexp=%s\ngot=%s", 10*time.Minute, d)
	}
	if err != nil {
		t.Fatalf("error parsing group by interval: %s", err.Error())
	}
}
Esempio n. 9
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func emptyTestServer() *httptest.Server {
	return httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("X-Influxdb-Version", SERVER_VERSION)

		// Fake authorization entirely based on the username.
		authorized := false
		user, _, _ := r.BasicAuth()
		switch user {
		case "", "admin":
			authorized = true
		}

		switch r.URL.Path {
		case "/query":
			values := r.URL.Query()
			parser := influxql.NewParser(bytes.NewBufferString(values.Get("q")))
			q, err := parser.ParseQuery()
			if err != nil {
				w.WriteHeader(http.StatusInternalServerError)
				return
			}
			stmt := q.Statements[0]

			switch stmt.(type) {
			case *influxql.ShowDatabasesStatement:
				if authorized {
					io.WriteString(w, `{"results":[{"series":[{"name":"databases","columns":["name"],"values":[["db"]]}]}]}`)
				} else {
					w.WriteHeader(http.StatusUnauthorized)
					io.WriteString(w, fmt.Sprintf(`{"error":"error authorizing query: %s not authorized to execute statement 'SHOW DATABASES', requires admin privilege"}`, user))
				}
			case *influxql.ShowDiagnosticsStatement:
				io.WriteString(w, `{"results":[{}]}`)
			}
		case "/write":
			w.WriteHeader(http.StatusOK)
		}
	}))
}
Esempio n. 10
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// Ensure that we see if a where clause has only time limitations
func TestOnlyTimeExpr(t *testing.T) {
	var tests = []struct {
		stmt string
		exp  bool
	}{
		{
			stmt: `SELECT value FROM myseries WHERE value > 1`,
			exp:  false,
		},
		{
			stmt: `SELECT value FROM foo WHERE time >= '2000-01-01T00:00:05Z'`,
			exp:  true,
		},
		{
			stmt: `SELECT value FROM foo WHERE time >= '2000-01-01T00:00:05Z' AND time < '2000-01-01T00:00:05Z'`,
			exp:  true,
		},
		{
			stmt: `SELECT value FROM foo WHERE time >= '2000-01-01T00:00:05Z' AND asdf = 'bar'`,
			exp:  false,
		},
		{
			stmt: `SELECT value FROM foo WHERE asdf = 'jkl' AND (time >= '2000-01-01T00:00:05Z' AND time < '2000-01-01T00:00:05Z')`,
			exp:  false,
		},
	}

	for i, tt := range tests {
		// Parse statement.
		stmt, err := influxql.NewParser(strings.NewReader(tt.stmt)).ParseStatement()
		if err != nil {
			t.Fatalf("invalid statement: %q: %s", tt.stmt, err)
		}
		if influxql.OnlyTimeExpr(stmt.(*influxql.SelectStatement).Condition) != tt.exp {
			t.Fatalf("%d. expected statement to return only time dimension to be %t: %s", i, tt.exp, tt.stmt)
		}
	}
}
Esempio n. 11
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// NewContinuousQuery returns a ContinuousQuery object with a parsed influxql.CreateContinuousQueryStatement
func NewContinuousQuery(database string, cqi *meta.ContinuousQueryInfo) (*ContinuousQuery, error) {
	stmt, err := influxql.NewParser(strings.NewReader(cqi.Query)).ParseStatement()
	if err != nil {
		return nil, err
	}

	q, ok := stmt.(*influxql.CreateContinuousQueryStatement)
	if !ok || q.Source.Target == nil || q.Source.Target.Measurement == nil {
		return nil, errors.New("query isn't a valid continuous query")
	}

	cquery := &ContinuousQuery{
		Database: database,
		Info:     cqi,
		Resample: ResampleOptions{
			Every: q.ResampleEvery,
			For:   q.ResampleFor,
		},
		q: q.Source,
	}

	return cquery, nil
}
Esempio n. 12
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// Ensure that the String() value of a statement is parseable
func TestParseString(t *testing.T) {
	var tests = []struct {
		stmt string
	}{
		{
			stmt: `SELECT "cpu load" FROM myseries`,
		},
		{
			stmt: `SELECT "cpu load" FROM "my series"`,
		},
		{
			stmt: `SELECT "cpu\"load" FROM myseries`,
		},
		{
			stmt: `SELECT "cpu'load" FROM myseries`,
		},
		{
			stmt: `SELECT "cpu load" FROM "my\"series"`,
		},
		{
			stmt: `SELECT "field with spaces" FROM "\"ugly\" db"."\"ugly\" rp"."\"ugly\" measurement"`,
		},
		{
			stmt: `SELECT * FROM myseries`,
		},
		{
			stmt: `DROP DATABASE "!"`,
		},
		{
			stmt: `DROP RETENTION POLICY "my rp" ON "a database"`,
		},
		{
			stmt: `CREATE RETENTION POLICY "my rp" ON "a database" DURATION 1d REPLICATION 1`,
		},
		{
			stmt: `ALTER RETENTION POLICY "my rp" ON "a database" DEFAULT`,
		},
		{
			stmt: `SHOW RETENTION POLICIES ON "a database"`,
		},
		{
			stmt: `SHOW TAG VALUES WITH KEY IN ("a long name", short)`,
		},
		{
			stmt: `DROP CONTINUOUS QUERY "my query" ON "my database"`,
		},
		// See issues https://github.com/influxdata/influxdb/issues/1647
		// and https://github.com/influxdata/influxdb/issues/4404
		//{
		//	stmt: `DELETE FROM "my db"."my rp"."my measurement"`,
		//},
		{
			stmt: `DROP SUBSCRIPTION "ugly \"subscription\" name" ON "\"my\" db"."\"my\" rp"`,
		},
		{
			stmt: `CREATE SUBSCRIPTION "ugly \"subscription\" name" ON "\"my\" db"."\"my\" rp" DESTINATIONS ALL 'my host', 'my other host'`,
		},
		{
			stmt: `SHOW MEASUREMENTS WITH MEASUREMENT =~ /foo/`,
		},
		{
			stmt: `SHOW MEASUREMENTS WITH MEASUREMENT = "and/or"`,
		},
		{
			stmt: `DROP USER "user with spaces"`,
		},
		{
			stmt: `GRANT ALL PRIVILEGES ON "db with spaces" TO "user with spaces"`,
		},
		{
			stmt: `GRANT ALL PRIVILEGES TO "user with spaces"`,
		},
		{
			stmt: `SHOW GRANTS FOR "user with spaces"`,
		},
		{
			stmt: `REVOKE ALL PRIVILEGES ON "db with spaces" FROM "user with spaces"`,
		},
		{
			stmt: `REVOKE ALL PRIVILEGES FROM "user with spaces"`,
		},
		{
			stmt: `CREATE DATABASE "db with spaces"`,
		},
	}

	for _, tt := range tests {
		// Parse statement.
		stmt, err := influxql.NewParser(strings.NewReader(tt.stmt)).ParseStatement()
		if err != nil {
			t.Fatalf("invalid statement: %q: %s", tt.stmt, err)
		}

		stmtCopy, err := influxql.NewParser(strings.NewReader(stmt.String())).ParseStatement()
		if err != nil {
			t.Fatalf("failed to parse string: %v\norig: %v\ngot: %v", err, tt.stmt, stmt.String())
		}

		if !reflect.DeepEqual(stmt, stmtCopy) {
			t.Fatalf("statement changed after stringifying and re-parsing:\noriginal : %v\nre-parsed: %v\n", tt.stmt, stmtCopy.String())
		}
	}
}
Esempio n. 13
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// Ensure the SELECT statement can have its start and end time set
func TestSelectStatement_SetTimeRange(t *testing.T) {
	q := "SELECT sum(value) from foo where time < now() GROUP BY time(10m)"
	stmt, err := influxql.NewParser(strings.NewReader(q)).ParseStatement()
	if err != nil {
		t.Fatalf("invalid statement: %q: %s", stmt, err)
	}

	s := stmt.(*influxql.SelectStatement)
	start := time.Now().Add(-20 * time.Hour).Round(time.Second).UTC()
	end := time.Now().Add(10 * time.Hour).Round(time.Second).UTC()
	s.SetTimeRange(start, end)
	min, max := MustTimeRange(s.Condition)

	if min != start {
		t.Fatalf("start time wasn't set properly.\n  exp: %s\n  got: %s", start, min)
	}
	// the end range is actually one nanosecond before the given one since end is exclusive
	end = end.Add(-time.Nanosecond)
	if max != end {
		t.Fatalf("end time wasn't set properly.\n  exp: %s\n  got: %s", end, max)
	}

	// ensure we can set a time on a select that already has one set
	start = time.Now().Add(-20 * time.Hour).Round(time.Second).UTC()
	end = time.Now().Add(10 * time.Hour).Round(time.Second).UTC()
	q = fmt.Sprintf("SELECT sum(value) from foo WHERE time >= %ds and time <= %ds GROUP BY time(10m)", start.Unix(), end.Unix())
	stmt, err = influxql.NewParser(strings.NewReader(q)).ParseStatement()
	if err != nil {
		t.Fatalf("invalid statement: %q: %s", stmt, err)
	}

	s = stmt.(*influxql.SelectStatement)
	min, max = MustTimeRange(s.Condition)
	if start != min || end != max {
		t.Fatalf("start and end times weren't equal:\n  exp: %s\n  got: %s\n  exp: %s\n  got:%s\n", start, min, end, max)
	}

	// update and ensure it saves it
	start = time.Now().Add(-40 * time.Hour).Round(time.Second).UTC()
	end = time.Now().Add(20 * time.Hour).Round(time.Second).UTC()
	s.SetTimeRange(start, end)
	min, max = MustTimeRange(s.Condition)

	// TODO: right now the SetTimeRange can't override the start time if it's more recent than what they're trying to set it to.
	//       shouldn't matter for our purposes with continuous queries, but fix this later

	if min != start {
		t.Fatalf("start time wasn't set properly.\n  exp: %s\n  got: %s", start, min)
	}
	// the end range is actually one nanosecond before the given one since end is exclusive
	end = end.Add(-time.Nanosecond)
	if max != end {
		t.Fatalf("end time wasn't set properly.\n  exp: %s\n  got: %s", end, max)
	}

	// ensure that when we set a time range other where clause conditions are still there
	q = "SELECT sum(value) from foo WHERE foo = 'bar' and time < now() GROUP BY time(10m)"
	stmt, err = influxql.NewParser(strings.NewReader(q)).ParseStatement()
	if err != nil {
		t.Fatalf("invalid statement: %q: %s", stmt, err)
	}

	s = stmt.(*influxql.SelectStatement)

	// update and ensure it saves it
	start = time.Now().Add(-40 * time.Hour).Round(time.Second).UTC()
	end = time.Now().Add(20 * time.Hour).Round(time.Second).UTC()
	s.SetTimeRange(start, end)
	min, max = MustTimeRange(s.Condition)

	if min != start {
		t.Fatalf("start time wasn't set properly.\n  exp: %s\n  got: %s", start, min)
	}
	// the end range is actually one nanosecond before the given one since end is exclusive
	end = end.Add(-time.Nanosecond)
	if max != end {
		t.Fatalf("end time wasn't set properly.\n  exp: %s\n  got: %s", end, max)
	}

	// ensure the where clause is there
	hasWhere := false
	influxql.WalkFunc(s.Condition, func(n influxql.Node) {
		if ex, ok := n.(*influxql.BinaryExpr); ok {
			if lhs, ok := ex.LHS.(*influxql.VarRef); ok {
				if lhs.Val == "foo" {
					if rhs, ok := ex.RHS.(*influxql.StringLiteral); ok {
						if rhs.Val == "bar" {
							hasWhere = true
						}
					}
				}
			}
		}
	})
	if !hasWhere {
		t.Fatal("set time range cleared out the where clause")
	}
}
Esempio n. 14
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// serveQuery parses an incoming query and, if valid, executes the query.
func (h *Handler) serveQuery(w http.ResponseWriter, r *http.Request, user *meta.UserInfo) {
	h.statMap.Add(statQueryRequest, 1)
	defer func(start time.Time) {
		h.statMap.Add(statQueryRequestDuration, time.Since(start).Nanoseconds())
	}(time.Now())

	q := r.URL.Query()
	pretty := q.Get("pretty") == "true"

	qp := strings.TrimSpace(q.Get("q"))
	if qp == "" {
		httpError(w, `missing required parameter "q"`, pretty, http.StatusBadRequest)
		return
	}

	epoch := strings.TrimSpace(q.Get("epoch"))

	p := influxql.NewParser(strings.NewReader(qp))
	db := q.Get("db")

	// Parse query from query string.
	query, err := p.ParseQuery()
	if err != nil {
		httpError(w, "error parsing query: "+err.Error(), pretty, http.StatusBadRequest)
		return
	}

	// Sanitize statements with passwords.
	for _, s := range query.Statements {
		switch stmt := s.(type) {
		case *influxql.CreateUserStatement:
			sanitize(r, stmt.Password)
		case *influxql.SetPasswordUserStatement:
			sanitize(r, stmt.Password)
		}
	}

	// Check authorization.
	if h.requireAuthentication {
		if err := h.QueryAuthorizer.AuthorizeQuery(user, query, db); err != nil {
			if err, ok := err.(meta.ErrAuthorize); ok {
				h.Logger.Printf("unauthorized request | user: %q | query: %q | database %q\n", err.User, err.Query.String(), err.Database)
			}
			httpError(w, "error authorizing query: "+err.Error(), pretty, http.StatusUnauthorized)
			return
		}
	}

	// Parse chunk size. Use default if not provided or unparsable.
	chunked := (q.Get("chunked") == "true")
	chunkSize := DefaultChunkSize
	if chunked {
		if n, err := strconv.ParseInt(q.Get("chunk_size"), 10, 64); err == nil {
			chunkSize = int(n)
		}
	}

	// Make sure if the client disconnects we signal the query to abort
	closing := make(chan struct{})
	if notifier, ok := w.(http.CloseNotifier); ok {
		notify := notifier.CloseNotify()
		go func() {
			<-notify
			close(closing)
		}()
	} else {
		defer close(closing)
	}

	// Execute query.
	w.Header().Add("content-type", "application/json")
	results := h.QueryExecutor.ExecuteQuery(query, db, chunkSize, closing)

	// if we're not chunking, this will be the in memory buffer for all results before sending to client
	resp := Response{Results: make([]*influxql.Result, 0)}

	// Status header is OK once this point is reached.
	w.WriteHeader(http.StatusOK)

	// pull all results from the channel
	for r := range results {
		// Ignore nil results.
		if r == nil {
			continue
		}

		// if requested, convert result timestamps to epoch
		if epoch != "" {
			convertToEpoch(r, epoch)
		}

		// Write out result immediately if chunked.
		if chunked {
			n, _ := w.Write(MarshalJSON(Response{
				Results: []*influxql.Result{r},
			}, pretty))
			h.statMap.Add(statQueryRequestBytesTransmitted, int64(n))
			w.(http.Flusher).Flush()
			continue
		}

		// It's not chunked so buffer results in memory.
		// Results for statements need to be combined together.
		// We need to check if this new result is for the same statement as
		// the last result, or for the next statement
		l := len(resp.Results)
		if l == 0 {
			resp.Results = append(resp.Results, r)
		} else if resp.Results[l-1].StatementID == r.StatementID {
			cr := resp.Results[l-1]
			rowsMerged := 0
			if len(cr.Series) > 0 {
				lastSeries := cr.Series[len(cr.Series)-1]

				for _, row := range r.Series {
					if !lastSeries.SameSeries(row) {
						// Next row is for a different series than last.
						break
					}
					// Values are for the same series, so append them.
					lastSeries.Values = append(lastSeries.Values, row.Values...)
					rowsMerged++
				}
			}

			// Append remaining rows as new rows.
			r.Series = r.Series[rowsMerged:]
			cr.Series = append(cr.Series, r.Series...)
		} else {
			resp.Results = append(resp.Results, r)
		}
	}

	// If it's not chunked we buffered everything in memory, so write it out
	if !chunked {
		n, _ := w.Write(MarshalJSON(resp, pretty))
		h.statMap.Add(statQueryRequestBytesTransmitted, int64(n))
	}
}
Esempio n. 15
0
// Test SELECT statement field rewrite.
func TestSelectStatement_RewriteFields(t *testing.T) {
	var tests = []struct {
		stmt    string
		rewrite string
	}{
		// No wildcards
		{
			stmt:    `SELECT value FROM cpu`,
			rewrite: `SELECT value FROM cpu`,
		},

		// Query wildcard
		{
			stmt:    `SELECT * FROM cpu`,
			rewrite: `SELECT host::tag, region::tag, value1::float, value2::integer FROM cpu`,
		},

		// Parser fundamentally prohibits multiple query sources

		// Query wildcard with explicit
		{
			stmt:    `SELECT *,value1 FROM cpu`,
			rewrite: `SELECT host::tag, region::tag, value1::float, value2::integer, value1::float FROM cpu`,
		},

		// Query multiple wildcards
		{
			stmt:    `SELECT *,* FROM cpu`,
			rewrite: `SELECT host::tag, region::tag, value1::float, value2::integer, host::tag, region::tag, value1::float, value2::integer FROM cpu`,
		},

		// Query wildcards with group by
		{
			stmt:    `SELECT * FROM cpu GROUP BY host`,
			rewrite: `SELECT region::tag, value1::float, value2::integer FROM cpu GROUP BY host`,
		},

		// No GROUP BY wildcards
		{
			stmt:    `SELECT value FROM cpu GROUP BY host`,
			rewrite: `SELECT value FROM cpu GROUP BY host`,
		},

		// No GROUP BY wildcards, time only
		{
			stmt:    `SELECT mean(value) FROM cpu where time < now() GROUP BY time(5ms)`,
			rewrite: `SELECT mean(value) FROM cpu WHERE time < now() GROUP BY time(5ms)`,
		},

		// GROUP BY wildcard
		{
			stmt:    `SELECT value FROM cpu GROUP BY *`,
			rewrite: `SELECT value FROM cpu GROUP BY host, region`,
		},

		// GROUP BY wildcard with time
		{
			stmt:    `SELECT mean(value) FROM cpu where time < now() GROUP BY *,time(1m)`,
			rewrite: `SELECT mean(value) FROM cpu WHERE time < now() GROUP BY host, region, time(1m)`,
		},

		// GROUP BY wildcard with fill
		{
			stmt:    `SELECT mean(value) FROM cpu where time < now() GROUP BY *,time(1m) fill(0)`,
			rewrite: `SELECT mean(value) FROM cpu WHERE time < now() GROUP BY host, region, time(1m) fill(0)`,
		},

		// GROUP BY wildcard with explicit
		{
			stmt:    `SELECT value FROM cpu GROUP BY *,host`,
			rewrite: `SELECT value FROM cpu GROUP BY host, region, host`,
		},

		// GROUP BY multiple wildcards
		{
			stmt:    `SELECT value FROM cpu GROUP BY *,*`,
			rewrite: `SELECT value FROM cpu GROUP BY host, region, host, region`,
		},

		// Combo
		{
			stmt:    `SELECT * FROM cpu GROUP BY *`,
			rewrite: `SELECT value1::float, value2::integer FROM cpu GROUP BY host, region`,
		},
	}

	for i, tt := range tests {
		// Parse statement.
		stmt, err := influxql.NewParser(strings.NewReader(tt.stmt)).ParseStatement()
		if err != nil {
			t.Fatalf("invalid statement: %q: %s", tt.stmt, err)
		}

		var ic IteratorCreator
		ic.FieldDimensionsFn = func(sources influxql.Sources) (fields map[string]influxql.DataType, dimensions map[string]struct{}, err error) {
			fields = map[string]influxql.DataType{"value1": influxql.Float, "value2": influxql.Integer}
			dimensions = map[string]struct{}{"host": struct{}{}, "region": struct{}{}}
			return
		}

		// Rewrite statement.
		rw, err := stmt.(*influxql.SelectStatement).RewriteFields(&ic)
		if err != nil {
			t.Errorf("%d. %q: error: %s", i, tt.stmt, err)
		} else if rw == nil {
			t.Errorf("%d. %q: unexpected nil statement", i, tt.stmt)
		} else if rw := rw.String(); tt.rewrite != rw {
			t.Errorf("%d. %q: unexpected rewrite:\n\nexp=%s\n\ngot=%s\n\n", i, tt.stmt, tt.rewrite, rw)
		}
	}
}
Esempio n. 16
0
// Ensure the SELECT statement can extract substatements.
func TestSelectStatement_Substatement(t *testing.T) {
	var tests = []struct {
		stmt string
		expr *influxql.VarRef
		sub  string
		err  string
	}{
		// 0. Single series
		{
			stmt: `SELECT value FROM myseries WHERE value > 1`,
			expr: &influxql.VarRef{Val: "value"},
			sub:  `SELECT value FROM myseries WHERE value > 1`,
		},

		// 1. Simple join
		{
			stmt: `SELECT sum(aa.value) + sum(bb.value) FROM aa, bb`,
			expr: &influxql.VarRef{Val: "aa.value"},
			sub:  `SELECT "aa.value" FROM aa`,
		},

		// 2. Simple merge
		{
			stmt: `SELECT sum(aa.value) + sum(bb.value) FROM aa, bb`,
			expr: &influxql.VarRef{Val: "bb.value"},
			sub:  `SELECT "bb.value" FROM bb`,
		},

		// 3. Join with condition
		{
			stmt: `SELECT sum(aa.value) + sum(bb.value) FROM aa, bb WHERE aa.host = 'servera' AND bb.host = 'serverb'`,
			expr: &influxql.VarRef{Val: "bb.value"},
			sub:  `SELECT "bb.value" FROM bb WHERE "bb.host" = 'serverb'`,
		},

		// 4. Join with complex condition
		{
			stmt: `SELECT sum(aa.value) + sum(bb.value) FROM aa, bb WHERE aa.host = 'servera' AND (bb.host = 'serverb' OR bb.host = 'serverc') AND 1 = 2`,
			expr: &influxql.VarRef{Val: "bb.value"},
			sub:  `SELECT "bb.value" FROM bb WHERE ("bb.host" = 'serverb' OR "bb.host" = 'serverc') AND 1 = 2`,
		},

		// 5. 4 with different condition order
		{
			stmt: `SELECT sum(aa.value) + sum(bb.value) FROM aa, bb WHERE ((bb.host = 'serverb' OR bb.host = 'serverc') AND aa.host = 'servera') AND 1 = 2`,
			expr: &influxql.VarRef{Val: "bb.value"},
			sub:  `SELECT "bb.value" FROM bb WHERE (("bb.host" = 'serverb' OR "bb.host" = 'serverc')) AND 1 = 2`,
		},
	}

	for i, tt := range tests {
		// Parse statement.
		stmt, err := influxql.NewParser(strings.NewReader(tt.stmt)).ParseStatement()
		if err != nil {
			t.Fatalf("invalid statement: %q: %s", tt.stmt, err)
		}

		// Extract substatement.
		sub, err := stmt.(*influxql.SelectStatement).Substatement(tt.expr)
		if err != nil {
			t.Errorf("%d. %q: unexpected error: %s", i, tt.stmt, err)
			continue
		}
		if substr := sub.String(); tt.sub != substr {
			t.Errorf("%d. %q: unexpected substatement:\n\nexp=%s\n\ngot=%s\n\n", i, tt.stmt, tt.sub, substr)
			continue
		}
	}
}
Esempio n. 17
0
// Test SELECT statement field rewrite.
func TestSelectStatement_RewriteFields(t *testing.T) {
	var tests = []struct {
		stmt    string
		rewrite string
	}{
		// No wildcards
		{
			stmt:    `SELECT value FROM cpu`,
			rewrite: `SELECT value FROM cpu`,
		},

		// Query wildcard
		{
			stmt:    `SELECT * FROM cpu`,
			rewrite: `SELECT host::tag, region::tag, value1::float, value2::integer FROM cpu`,
		},

		// Parser fundamentally prohibits multiple query sources

		// Query wildcard with explicit
		{
			stmt:    `SELECT *,value1 FROM cpu`,
			rewrite: `SELECT host::tag, region::tag, value1::float, value2::integer, value1::float FROM cpu`,
		},

		// Query multiple wildcards
		{
			stmt:    `SELECT *,* FROM cpu`,
			rewrite: `SELECT host::tag, region::tag, value1::float, value2::integer, host::tag, region::tag, value1::float, value2::integer FROM cpu`,
		},

		// Query wildcards with group by
		{
			stmt:    `SELECT * FROM cpu GROUP BY host`,
			rewrite: `SELECT region::tag, value1::float, value2::integer FROM cpu GROUP BY host`,
		},

		// No GROUP BY wildcards
		{
			stmt:    `SELECT value FROM cpu GROUP BY host`,
			rewrite: `SELECT value FROM cpu GROUP BY host`,
		},

		// No GROUP BY wildcards, time only
		{
			stmt:    `SELECT mean(value) FROM cpu where time < now() GROUP BY time(5ms)`,
			rewrite: `SELECT mean(value) FROM cpu WHERE time < now() GROUP BY time(5ms)`,
		},

		// GROUP BY wildcard
		{
			stmt:    `SELECT value FROM cpu GROUP BY *`,
			rewrite: `SELECT value FROM cpu GROUP BY host, region`,
		},

		// GROUP BY wildcard with time
		{
			stmt:    `SELECT mean(value) FROM cpu where time < now() GROUP BY *,time(1m)`,
			rewrite: `SELECT mean(value) FROM cpu WHERE time < now() GROUP BY host, region, time(1m)`,
		},

		// GROUP BY wildcard with fill
		{
			stmt:    `SELECT mean(value) FROM cpu where time < now() GROUP BY *,time(1m) fill(0)`,
			rewrite: `SELECT mean(value) FROM cpu WHERE time < now() GROUP BY host, region, time(1m) fill(0)`,
		},

		// GROUP BY wildcard with explicit
		{
			stmt:    `SELECT value FROM cpu GROUP BY *,host`,
			rewrite: `SELECT value FROM cpu GROUP BY host, region, host`,
		},

		// GROUP BY multiple wildcards
		{
			stmt:    `SELECT value FROM cpu GROUP BY *,*`,
			rewrite: `SELECT value FROM cpu GROUP BY host, region, host, region`,
		},

		// Combo
		{
			stmt:    `SELECT * FROM cpu GROUP BY *`,
			rewrite: `SELECT value1::float, value2::integer FROM cpu GROUP BY host, region`,
		},

		// Wildcard function with all fields.
		{
			stmt:    `SELECT mean(*) FROM cpu`,
			rewrite: `SELECT mean(value1::float) AS mean_value1, mean(value2::integer) AS mean_value2 FROM cpu`,
		},

		{
			stmt:    `SELECT distinct(*) FROM strings`,
			rewrite: `SELECT distinct(string::string) AS distinct_string, distinct(value::float) AS distinct_value FROM strings`,
		},

		{
			stmt:    `SELECT distinct(*) FROM bools`,
			rewrite: `SELECT distinct(bool::boolean) AS distinct_bool, distinct(value::float) AS distinct_value FROM bools`,
		},

		// Wildcard function with some fields excluded.
		{
			stmt:    `SELECT mean(*) FROM strings`,
			rewrite: `SELECT mean(value::float) AS mean_value FROM strings`,
		},

		{
			stmt:    `SELECT mean(*) FROM bools`,
			rewrite: `SELECT mean(value::float) AS mean_value FROM bools`,
		},

		// Wildcard function with an alias.
		{
			stmt:    `SELECT mean(*) AS alias FROM cpu`,
			rewrite: `SELECT mean(value1::float) AS alias_value1, mean(value2::integer) AS alias_value2 FROM cpu`,
		},
	}

	for i, tt := range tests {
		// Parse statement.
		stmt, err := influxql.NewParser(strings.NewReader(tt.stmt)).ParseStatement()
		if err != nil {
			t.Fatalf("invalid statement: %q: %s", tt.stmt, err)
		}

		var ic IteratorCreator
		ic.FieldDimensionsFn = func(sources influxql.Sources) (fields map[string]influxql.DataType, dimensions map[string]struct{}, err error) {
			source := sources[0].(*influxql.Measurement)
			switch source.Name {
			case "cpu":
				fields = map[string]influxql.DataType{
					"value1": influxql.Float,
					"value2": influxql.Integer,
				}
			case "strings":
				fields = map[string]influxql.DataType{
					"value":  influxql.Float,
					"string": influxql.String,
				}
			case "bools":
				fields = map[string]influxql.DataType{
					"value": influxql.Float,
					"bool":  influxql.Boolean,
				}
			}
			dimensions = map[string]struct{}{"host": struct{}{}, "region": struct{}{}}
			return
		}

		// Rewrite statement.
		rw, err := stmt.(*influxql.SelectStatement).RewriteFields(&ic)
		if err != nil {
			t.Errorf("%d. %q: error: %s", i, tt.stmt, err)
		} else if rw == nil {
			t.Errorf("%d. %q: unexpected nil statement", i, tt.stmt)
		} else if rw := rw.String(); tt.rewrite != rw {
			t.Errorf("%d. %q: unexpected rewrite:\n\nexp=%s\n\ngot=%s\n\n", i, tt.stmt, tt.rewrite, rw)
		}
	}
}
Esempio n. 18
0
func TestSelectStatement_HasWildcard(t *testing.T) {
	var tests = []struct {
		stmt     string
		wildcard bool
	}{
		// No wildcards
		{
			stmt:     `SELECT value FROM cpu`,
			wildcard: false,
		},

		// Query wildcard
		{
			stmt:     `SELECT * FROM cpu`,
			wildcard: true,
		},

		// No GROUP BY wildcards
		{
			stmt:     `SELECT value FROM cpu GROUP BY host`,
			wildcard: false,
		},

		// No GROUP BY wildcards, time only
		{
			stmt:     `SELECT mean(value) FROM cpu where time < now() GROUP BY time(5ms)`,
			wildcard: false,
		},

		// GROUP BY wildcard
		{
			stmt:     `SELECT value FROM cpu GROUP BY *`,
			wildcard: true,
		},

		// GROUP BY wildcard with time
		{
			stmt:     `SELECT mean(value) FROM cpu where time < now() GROUP BY *,time(1m)`,
			wildcard: true,
		},

		// GROUP BY wildcard with explicit
		{
			stmt:     `SELECT value FROM cpu GROUP BY *,host`,
			wildcard: true,
		},

		// GROUP BY multiple wildcards
		{
			stmt:     `SELECT value FROM cpu GROUP BY *,*`,
			wildcard: true,
		},

		// Combo
		{
			stmt:     `SELECT * FROM cpu GROUP BY *`,
			wildcard: true,
		},
	}

	for i, tt := range tests {
		// Parse statement.
		stmt, err := influxql.NewParser(strings.NewReader(tt.stmt)).ParseStatement()
		if err != nil {
			t.Fatalf("invalid statement: %q: %s", tt.stmt, err)
		}

		// Test wildcard detection.
		if w := stmt.(*influxql.SelectStatement).HasWildcard(); tt.wildcard != w {
			t.Errorf("%d. %q: unexpected wildcard detection:\n\nexp=%v\n\ngot=%v\n\n", i, tt.stmt, tt.wildcard, w)
			continue
		}
	}
}
Esempio n. 19
0
// serveQuery parses an incoming query and, if valid, executes the query.
func (h *Handler) serveQuery(w http.ResponseWriter, r *http.Request, user *meta.UserInfo) {
	atomic.AddInt64(&h.stats.QueryRequests, 1)
	defer func(start time.Time) {
		atomic.AddInt64(&h.stats.QueryRequestDuration, time.Since(start).Nanoseconds())
	}(time.Now())

	pretty := r.FormValue("pretty") == "true"
	nodeID, _ := strconv.ParseUint(r.FormValue("node_id"), 10, 64)

	qp := strings.TrimSpace(r.FormValue("q"))
	if qp == "" {
		h.httpError(w, `missing required parameter "q"`, pretty, http.StatusBadRequest)
		return
	}

	epoch := strings.TrimSpace(r.FormValue("epoch"))

	p := influxql.NewParser(strings.NewReader(qp))
	db := r.FormValue("db")

	// Sanitize the request query params so it doesn't show up in the response logger.
	// Do this before anything else so a parsing error doesn't leak passwords.
	sanitize(r)

	// Parse the parameters
	rawParams := r.FormValue("params")
	if rawParams != "" {
		var params map[string]interface{}
		decoder := json.NewDecoder(strings.NewReader(rawParams))
		decoder.UseNumber()
		if err := decoder.Decode(&params); err != nil {
			h.httpError(w, "error parsing query parameters: "+err.Error(), pretty, http.StatusBadRequest)
			return
		}

		// Convert json.Number into int64 and float64 values
		for k, v := range params {
			if v, ok := v.(json.Number); ok {
				var err error
				if strings.Contains(string(v), ".") {
					params[k], err = v.Float64()
				} else {
					params[k], err = v.Int64()
				}

				if err != nil {
					h.httpError(w, "error parsing json value: "+err.Error(), pretty, http.StatusBadRequest)
					return
				}
			}
		}
		p.SetParams(params)
	}

	// Parse query from query string.
	query, err := p.ParseQuery()
	if err != nil {
		h.httpError(w, "error parsing query: "+err.Error(), pretty, http.StatusBadRequest)
		return
	}

	// Check authorization.
	if h.Config.AuthEnabled {
		if err := h.QueryAuthorizer.AuthorizeQuery(user, query, db); err != nil {
			if err, ok := err.(meta.ErrAuthorize); ok {
				h.Logger.Printf("Unauthorized request | user: %q | query: %q | database %q\n", err.User, err.Query.String(), err.Database)
			}
			h.httpError(w, "error authorizing query: "+err.Error(), pretty, http.StatusUnauthorized)
			return
		}
	}

	// Parse chunk size. Use default if not provided or unparsable.
	chunked := (r.FormValue("chunked") == "true")
	chunkSize := DefaultChunkSize
	if chunked {
		if n, err := strconv.ParseInt(r.FormValue("chunk_size"), 10, 64); err == nil && int(n) > 0 {
			chunkSize = int(n)
		}
	}

	// Make sure if the client disconnects we signal the query to abort
	closing := make(chan struct{})
	if notifier, ok := w.(http.CloseNotifier); ok {
		// CloseNotify() is not guaranteed to send a notification when the query
		// is closed. Use this channel to signal that the query is finished to
		// prevent lingering goroutines that may be stuck.
		done := make(chan struct{})
		defer close(done)

		notify := notifier.CloseNotify()
		go func() {
			// Wait for either the request to finish
			// or for the client to disconnect
			select {
			case <-done:
			case <-notify:
				close(closing)
			}
		}()
	} else {
		defer close(closing)
	}

	// Execute query.
	w.Header().Add("Connection", "close")
	w.Header().Add("Content-Type", "application/json")
	results := h.QueryExecutor.ExecuteQuery(query, influxql.ExecutionOptions{
		Database:  db,
		ChunkSize: chunkSize,
		ReadOnly:  r.Method == "GET",
		NodeID:    nodeID,
	}, closing)

	// if we're not chunking, this will be the in memory buffer for all results before sending to client
	resp := Response{Results: make([]*influxql.Result, 0)}

	// Status header is OK once this point is reached.
	h.writeHeader(w, http.StatusOK)

	// pull all results from the channel
	rows := 0
	for r := range results {
		// Ignore nil results.
		if r == nil {
			continue
		}

		// if requested, convert result timestamps to epoch
		if epoch != "" {
			convertToEpoch(r, epoch)
		}

		// Write out result immediately if chunked.
		if chunked {
			n, _ := w.Write(MarshalJSON(Response{
				Results: []*influxql.Result{r},
			}, pretty))
			if !pretty {
				w.Write([]byte("\n"))
			}
			atomic.AddInt64(&h.stats.QueryRequestBytesTransmitted, int64(n))
			w.(http.Flusher).Flush()
			continue
		}

		// Limit the number of rows that can be returned in a non-chunked response.
		// This is to prevent the server from going OOM when returning a large response.
		// If you want to return more than the default chunk size, then use chunking
		// to process multiple blobs.
		rows += len(r.Series)
		if h.Config.MaxRowLimit > 0 && rows > h.Config.MaxRowLimit {
			break
		}

		// It's not chunked so buffer results in memory.
		// Results for statements need to be combined together.
		// We need to check if this new result is for the same statement as
		// the last result, or for the next statement
		l := len(resp.Results)
		if l == 0 {
			resp.Results = append(resp.Results, r)
		} else if resp.Results[l-1].StatementID == r.StatementID {
			if r.Err != nil {
				resp.Results[l-1] = r
				continue
			}

			cr := resp.Results[l-1]
			rowsMerged := 0
			if len(cr.Series) > 0 {
				lastSeries := cr.Series[len(cr.Series)-1]

				for _, row := range r.Series {
					if !lastSeries.SameSeries(row) {
						// Next row is for a different series than last.
						break
					}
					// Values are for the same series, so append them.
					lastSeries.Values = append(lastSeries.Values, row.Values...)
					rowsMerged++
				}
			}

			// Append remaining rows as new rows.
			r.Series = r.Series[rowsMerged:]
			cr.Series = append(cr.Series, r.Series...)
			cr.Messages = append(cr.Messages, r.Messages...)
		} else {
			resp.Results = append(resp.Results, r)
		}
	}

	// If it's not chunked we buffered everything in memory, so write it out
	if !chunked {
		n, _ := w.Write(MarshalJSON(resp, pretty))
		atomic.AddInt64(&h.stats.QueryRequestBytesTransmitted, int64(n))
	}
}
Esempio n. 20
0
// serveQuery parses an incoming query and, if valid, executes the query.
func (h *Handler) serveQuery(w http.ResponseWriter, r *http.Request, user *meta.UserInfo) {
	atomic.AddInt64(&h.stats.QueryRequests, 1)
	defer func(start time.Time) {
		atomic.AddInt64(&h.stats.QueryRequestDuration, time.Since(start).Nanoseconds())
	}(time.Now())

	// Retrieve the underlying ResponseWriter or initialize our own.
	rw, ok := w.(ResponseWriter)
	if !ok {
		rw = NewResponseWriter(w, r)
	}

	// Retrieve the node id the query should be executed on.
	nodeID, _ := strconv.ParseUint(r.FormValue("node_id"), 10, 64)

	var qr io.Reader
	// Attempt to read the form value from the "q" form value.
	if qp := strings.TrimSpace(r.FormValue("q")); qp != "" {
		qr = strings.NewReader(qp)
	} else if r.MultipartForm != nil && r.MultipartForm.File != nil {
		// If we have a multipart/form-data, try to retrieve a file from 'q'.
		if fhs := r.MultipartForm.File["q"]; len(fhs) > 0 {
			f, err := fhs[0].Open()
			if err != nil {
				h.httpError(rw, err.Error(), http.StatusBadRequest)
				return
			}
			defer f.Close()
			qr = f
		}
	}

	if qr == nil {
		h.httpError(rw, `missing required parameter "q"`, http.StatusBadRequest)
		return
	}

	epoch := strings.TrimSpace(r.FormValue("epoch"))

	p := influxql.NewParser(qr)
	db := r.FormValue("db")

	// Sanitize the request query params so it doesn't show up in the response logger.
	// Do this before anything else so a parsing error doesn't leak passwords.
	sanitize(r)

	// Parse the parameters
	rawParams := r.FormValue("params")
	if rawParams != "" {
		var params map[string]interface{}
		decoder := json.NewDecoder(strings.NewReader(rawParams))
		decoder.UseNumber()
		if err := decoder.Decode(&params); err != nil {
			h.httpError(rw, "error parsing query parameters: "+err.Error(), http.StatusBadRequest)
			return
		}

		// Convert json.Number into int64 and float64 values
		for k, v := range params {
			if v, ok := v.(json.Number); ok {
				var err error
				if strings.Contains(string(v), ".") {
					params[k], err = v.Float64()
				} else {
					params[k], err = v.Int64()
				}

				if err != nil {
					h.httpError(rw, "error parsing json value: "+err.Error(), http.StatusBadRequest)
					return
				}
			}
		}
		p.SetParams(params)
	}

	// Parse query from query string.
	query, err := p.ParseQuery()
	if err != nil {
		h.httpError(rw, "error parsing query: "+err.Error(), http.StatusBadRequest)
		return
	}

	// Check authorization.
	if h.Config.AuthEnabled {
		if err := h.QueryAuthorizer.AuthorizeQuery(user, query, db); err != nil {
			if err, ok := err.(meta.ErrAuthorize); ok {
				h.Logger.Printf("Unauthorized request | user: %q | query: %q | database %q\n", err.User, err.Query.String(), err.Database)
			}
			h.httpError(rw, "error authorizing query: "+err.Error(), http.StatusForbidden)
			return
		}
	}

	// Parse chunk size. Use default if not provided or unparsable.
	chunked := r.FormValue("chunked") == "true"
	chunkSize := DefaultChunkSize
	if chunked {
		if n, err := strconv.ParseInt(r.FormValue("chunk_size"), 10, 64); err == nil && int(n) > 0 {
			chunkSize = int(n)
		}
	}

	// Parse whether this is an async command.
	async := r.FormValue("async") == "true"

	opts := influxql.ExecutionOptions{
		Database:  db,
		ChunkSize: chunkSize,
		ReadOnly:  r.Method == "GET",
		NodeID:    nodeID,
	}

	// Make sure if the client disconnects we signal the query to abort
	var closing chan struct{}
	if !async {
		closing = make(chan struct{})
		if notifier, ok := w.(http.CloseNotifier); ok {
			// CloseNotify() is not guaranteed to send a notification when the query
			// is closed. Use this channel to signal that the query is finished to
			// prevent lingering goroutines that may be stuck.
			done := make(chan struct{})
			defer close(done)

			notify := notifier.CloseNotify()
			go func() {
				// Wait for either the request to finish
				// or for the client to disconnect
				select {
				case <-done:
				case <-notify:
					close(closing)
				}
			}()
			opts.AbortCh = done
		} else {
			defer close(closing)
		}
	}

	// Execute query.
	rw.Header().Add("Connection", "close")
	results := h.QueryExecutor.ExecuteQuery(query, opts, closing)

	// If we are running in async mode, open a goroutine to drain the results
	// and return with a StatusNoContent.
	if async {
		go h.async(query, results)
		h.writeHeader(w, http.StatusNoContent)
		return
	}

	// if we're not chunking, this will be the in memory buffer for all results before sending to client
	resp := Response{Results: make([]*influxql.Result, 0)}

	// Status header is OK once this point is reached.
	// Attempt to flush the header immediately so the client gets the header information
	// and knows the query was accepted.
	h.writeHeader(rw, http.StatusOK)
	if w, ok := w.(http.Flusher); ok {
		w.Flush()
	}

	// pull all results from the channel
	rows := 0
	for r := range results {
		// Ignore nil results.
		if r == nil {
			continue
		}

		// if requested, convert result timestamps to epoch
		if epoch != "" {
			convertToEpoch(r, epoch)
		}

		// Write out result immediately if chunked.
		if chunked {
			n, _ := rw.WriteResponse(Response{
				Results: []*influxql.Result{r},
			})
			atomic.AddInt64(&h.stats.QueryRequestBytesTransmitted, int64(n))
			w.(http.Flusher).Flush()
			continue
		}

		// Limit the number of rows that can be returned in a non-chunked
		// response.  This is to prevent the server from going OOM when
		// returning a large response.  If you want to return more than the
		// default chunk size, then use chunking to process multiple blobs.
		// Iterate through the series in this result to count the rows and
		// truncate any rows we shouldn't return.
		if h.Config.MaxRowLimit > 0 {
			for i, series := range r.Series {
				n := h.Config.MaxRowLimit - rows
				if n < len(series.Values) {
					// We have reached the maximum number of values. Truncate
					// the values within this row.
					series.Values = series.Values[:n]
					// Since this was truncated, it will always be a partial return.
					// Add this so the client knows we truncated the response.
					series.Partial = true
				}
				rows += len(series.Values)

				if rows >= h.Config.MaxRowLimit {
					// Drop any remaining series since we have already reached the row limit.
					if i < len(r.Series) {
						r.Series = r.Series[:i+1]
					}
					break
				}
			}
		}

		// It's not chunked so buffer results in memory.
		// Results for statements need to be combined together.
		// We need to check if this new result is for the same statement as
		// the last result, or for the next statement
		l := len(resp.Results)
		if l == 0 {
			resp.Results = append(resp.Results, r)
		} else if resp.Results[l-1].StatementID == r.StatementID {
			if r.Err != nil {
				resp.Results[l-1] = r
				continue
			}

			cr := resp.Results[l-1]
			rowsMerged := 0
			if len(cr.Series) > 0 {
				lastSeries := cr.Series[len(cr.Series)-1]

				for _, row := range r.Series {
					if !lastSeries.SameSeries(row) {
						// Next row is for a different series than last.
						break
					}
					// Values are for the same series, so append them.
					lastSeries.Values = append(lastSeries.Values, row.Values...)
					rowsMerged++
				}
			}

			// Append remaining rows as new rows.
			r.Series = r.Series[rowsMerged:]
			cr.Series = append(cr.Series, r.Series...)
			cr.Messages = append(cr.Messages, r.Messages...)
			cr.Partial = r.Partial
		} else {
			resp.Results = append(resp.Results, r)
		}

		// Drop out of this loop and do not process further results when we hit the row limit.
		if h.Config.MaxRowLimit > 0 && rows >= h.Config.MaxRowLimit {
			// If the result is marked as partial, remove that partial marking
			// here. While the series is partial and we would normally have
			// tried to return the rest in the next chunk, we are not using
			// chunking and are truncating the series so we don't want to
			// signal to the client that we plan on sending another JSON blob
			// with another result.  The series, on the other hand, still
			// returns partial true if it was truncated or had more data to
			// send in a future chunk.
			r.Partial = false
			break
		}
	}

	// If it's not chunked we buffered everything in memory, so write it out
	if !chunked {
		n, _ := rw.WriteResponse(resp)
		atomic.AddInt64(&h.stats.QueryRequestBytesTransmitted, int64(n))
	}
}
Esempio n. 21
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// Test SELECT statement regex conditions rewrite.
func TestSelectStatement_RewriteRegexConditions(t *testing.T) {
	var tests = []struct {
		in  string
		out string
	}{
		{in: `SELECT value FROM cpu`, out: `SELECT value FROM cpu`},
		{in: `SELECT value FROM cpu WHERE host='server-1'`, out: `SELECT value FROM cpu WHERE host='server-1'`},
		{in: `SELECT value FROM cpu WHERE host = 'server-1'`, out: `SELECT value FROM cpu WHERE host = 'server-1'`},
		{in: `SELECT value FROM cpu WHERE host != 'server-1'`, out: `SELECT value FROM cpu WHERE host != 'server-1'`},

		// Non matching regex
		{in: `SELECT value FROM cpu WHERE host =~ /server-1|server-2|server-3/`, out: `SELECT value FROM cpu WHERE host =~ /server-1|server-2|server-3/`},
		{in: `SELECT value FROM cpu WHERE host =~ /server-1/`, out: `SELECT value FROM cpu WHERE host =~ /server-1/`},
		{in: `SELECT value FROM cpu WHERE host !~ /server-1/`, out: `SELECT value FROM cpu WHERE host !~ /server-1/`},
		{in: `SELECT value FROM cpu WHERE host =~ /^server-1/`, out: `SELECT value FROM cpu WHERE host =~ /^server-1/`},
		{in: `SELECT value FROM cpu WHERE host =~ /server-1$/`, out: `SELECT value FROM cpu WHERE host =~ /server-1$/`},
		{in: `SELECT value FROM cpu WHERE host !~ /\^server-1$/`, out: `SELECT value FROM cpu WHERE host !~ /\^server-1$/`},
		{in: `SELECT value FROM cpu WHERE host !~ /\^$/`, out: `SELECT value FROM cpu WHERE host !~ /\^$/`},
		{in: `SELECT value FROM cpu WHERE host !~ /^server-1\$/`, out: `SELECT value FROM cpu WHERE host !~ /^server-1\$/`},
		{in: `SELECT value FROM cpu WHERE host =~ /^\$/`, out: `SELECT value FROM cpu WHERE host =~ /^\$/`},
		{in: `SELECT value FROM cpu WHERE host !~ /^a/`, out: `SELECT value FROM cpu WHERE host !~ /^a/`},

		// These regexes are not supported due to the presence of escaped or meta characters.
		{in: `SELECT value FROM cpu WHERE host !~ /^(foo|bar)$/`, out: `SELECT value FROM cpu WHERE host !~ /^(foo|bar)$/`},
		{in: `SELECT value FROM cpu WHERE host !~ /^?a$/`, out: `SELECT value FROM cpu WHERE host !~ /^?a$/`},
		{in: `SELECT value FROM cpu WHERE host !~ /^[a-z]$/`, out: `SELECT value FROM cpu WHERE host !~ /^[a-z]$/`},
		{in: `SELECT value FROM cpu WHERE host !~ /^\d$/`, out: `SELECT value FROM cpu WHERE host !~ /^\d$/`},
		{in: `SELECT value FROM cpu WHERE host !~ /^a*$/`, out: `SELECT value FROM cpu WHERE host !~ /^a*$/`},
		{in: `SELECT value FROM cpu WHERE host !~ /^a.b$/`, out: `SELECT value FROM cpu WHERE host !~ /^a.b$/`},
		{in: `SELECT value FROM cpu WHERE host !~ /^ab+$/`, out: `SELECT value FROM cpu WHERE host !~ /^ab+$/`},
		{in: `SELECT value FROM cpu WHERE host =~ /^hello\world$/`, out: `SELECT value FROM cpu WHERE host =~ /^hello\world$/`},

		// These regexes all match and will be rewritten.
		{in: `SELECT value FROM cpu WHERE host !~ /^a[2]$/`, out: `SELECT value FROM cpu WHERE host != 'a2'`},
		{in: `SELECT value FROM cpu WHERE host =~ /^server-1$/`, out: `SELECT value FROM cpu WHERE host = 'server-1'`},
		{in: `SELECT value FROM cpu WHERE host !~ /^server-1$/`, out: `SELECT value FROM cpu WHERE host != 'server-1'`},
		{in: `SELECT value FROM cpu WHERE host =~ /^server 1$/`, out: `SELECT value FROM cpu WHERE host = 'server 1'`},
		{in: `SELECT value FROM cpu WHERE host =~ /^$/`, out: `SELECT value FROM cpu WHERE host = ''`},
		{in: `SELECT value FROM cpu WHERE host !~ /^$/`, out: `SELECT value FROM cpu WHERE host != ''`},
		{in: `SELECT value FROM cpu WHERE host =~ /^server-1$/ OR host =~ /^server-2$/`, out: `SELECT value FROM cpu WHERE host = 'server-1' OR host = 'server-2'`},
		{in: `SELECT value FROM cpu WHERE host =~ /^server-1$/ OR host =~ /^server]a$/`, out: `SELECT value FROM cpu WHERE host = 'server-1' OR host = 'server]a'`},
		{in: `SELECT value FROM cpu WHERE host =~ /^hello\?$/`, out: `SELECT value FROM cpu WHERE host = 'hello?'`},
		{in: `SELECT value FROM cpu WHERE host !~ /^\\$/`, out: `SELECT value FROM cpu WHERE host != '\\'`},
		{in: `SELECT value FROM cpu WHERE host !~ /^\\\$$/`, out: `SELECT value FROM cpu WHERE host != '\\$'`},
	}

	for i, test := range tests {
		stmt, err := influxql.NewParser(strings.NewReader(test.in)).ParseStatement()
		if err != nil {
			t.Fatalf("[Example %d], %v", i, err)
		}

		// Rewrite any supported regex conditions.
		stmt.(*influxql.SelectStatement).RewriteRegexConditions()

		// Get the expected rewritten statement.
		expStmt, err := influxql.NewParser(strings.NewReader(test.out)).ParseStatement()
		if err != nil {
			t.Fatalf("[Example %d], %v", i, err)
		}

		// Compare the (potentially) rewritten AST to the expected AST.
		if got, exp := stmt, expStmt; !reflect.DeepEqual(got, exp) {
			t.Errorf("[Example %d]\nattempting %v\ngot %v\n%s\n\nexpected %v\n%s\n", i+1, test.in, got, mustMarshalJSON(got), exp, mustMarshalJSON(exp))
		}
	}
}