feat: allow query restrictions for log queries (#4778)

* feat: allow query restrictions for log queries

* fix: error check

* fix: set default only if not present

* chore: add error log for query restriction error

* fix: add limtations for traces

* fix: fix wrapper

---------

Co-authored-by: Srikanth Chekuri <srikanth.chekuri92@gmail.com>

pkg/query-service/app/clickhouseReader/reader.go

@@ -163,7 +163,14 @@ func NewReaderFromClickhouseConnection(
 		os.Exit(1)
 	}
 
-	wrap := clickhouseConnWrapper{conn: db}
+	wrap := clickhouseConnWrapper{
+		conn: db,
+		settings: ClickhouseQuerySettings{
+			MaxExecutionTimeLeaf:                os.Getenv("ClickHouseMaxExecutionTimeLeaf"),
+			TimeoutBeforeCheckingExecutionSpeed: os.Getenv("ClickHouseTimeoutBeforeCheckingExecutionSpeed"),
+			MaxBytesToRead:                      os.Getenv("ClickHouseMaxBytesToRead"),
+		},
+	}
 
 	return &ClickHouseReader{
 		db:                      wrap,
@@ -4742,7 +4749,7 @@ func readRowsForTimeSeriesResult(rows driver.Rows, vars []interface{}, columnNam
 		series := v3.Series{Labels: seriesToAttrs[key], Points: points, GroupingSetsPoint: groupingSetsPoint, LabelsArray: labelsArray[key]}
 		seriesList = append(seriesList, &series)
 	}
-	return seriesList, nil
+	return seriesList, getPersonalisedError(rows.Err())
 }
 
 func logComment(ctx context.Context) string {
@@ -4833,10 +4840,25 @@ func (r *ClickHouseReader) GetListResultV3(ctx context.Context, query string) ([
 		rowList = append(rowList, &v3.Row{Timestamp: t, Data: row})
 	}
 
-	return rowList, nil
+	return rowList, getPersonalisedError(rows.Err())
 
 }
 
+func getPersonalisedError(err error) error {
+	if err == nil {
+		return nil
+	}
+	zap.L().Error("error while reading result", zap.Error(err))
+	if strings.Contains(err.Error(), "code: 307") {
+		return errors.New("query is consuming too much resources, please reach out to the team")
+	}
+
+	if strings.Contains(err.Error(), "code: 159") {
+		return errors.New("Query is taking too long to run, please reach out to the team")
+	}
+	return err
+}
+
 func removeDuplicateUnderscoreAttributes(row map[string]interface{}) {
 	if val, ok := row["attributes_int64"]; ok {
 		attributes := val.(*map[string]int64)

pkg/query-service/app/clickhouseReader/wrapper.go

@@ -3,13 +3,21 @@ package clickhouseReader
 import (
 	"context"
 	"encoding/json"
+	"strings"
 
 	"github.com/ClickHouse/clickhouse-go/v2"
 	"github.com/ClickHouse/clickhouse-go/v2/lib/driver"
 )
 
+type ClickhouseQuerySettings struct {
+	MaxExecutionTimeLeaf                string
+	TimeoutBeforeCheckingExecutionSpeed string
+	MaxBytesToRead                      string
+}
+
 type clickhouseConnWrapper struct {
 	conn     clickhouse.Conn
+	settings ClickhouseQuerySettings
 }
 
 func (c clickhouseConnWrapper) Close() error {
@@ -24,48 +32,75 @@ func (c clickhouseConnWrapper) Stats() driver.Stats {
 	return c.conn.Stats()
 }
 
-func (c clickhouseConnWrapper) logComment(ctx context.Context) context.Context {
+func (c clickhouseConnWrapper) addClickHouseSettings(ctx context.Context, query string) context.Context {
+	settings := clickhouse.Settings{}
+
+	logComment := c.getLogComment(ctx)
+	if logComment != "" {
+		settings["log_comment"] = logComment
+	}
+
+	// don't add resource restrictions traces
+	if strings.Contains(query, "signoz_traces") {
+		ctx = clickhouse.Context(ctx, clickhouse.WithSettings(settings))
+		return ctx
+	}
+
+	if c.settings.MaxBytesToRead != "" {
+		settings["max_bytes_to_read"] = c.settings.MaxBytesToRead
+	}
+
+	if c.settings.MaxExecutionTimeLeaf != "" {
+		settings["max_execution_time_leaf"] = c.settings.MaxExecutionTimeLeaf
+	}
+
+	if c.settings.TimeoutBeforeCheckingExecutionSpeed != "" {
+		settings["timeout_before_checking_execution_speed"] = c.settings.TimeoutBeforeCheckingExecutionSpeed
+	}
+
+	ctx = clickhouse.Context(ctx, clickhouse.WithSettings(settings))
+	return ctx
+}
+
+func (c clickhouseConnWrapper) getLogComment(ctx context.Context) string {
 	// Get the key-value pairs from context for log comment
 	kv := ctx.Value("log_comment")
 	if kv == nil {
-		return ctx
+		return ""
 	}
 
 	logCommentKVs, ok := kv.(map[string]string)
 	if !ok {
-		return ctx
+		return ""
 	}
 
 	logComment, _ := json.Marshal(logCommentKVs)
 
-	ctx = clickhouse.Context(ctx, clickhouse.WithSettings(clickhouse.Settings{
+	return string(logComment)
-		"log_comment": logComment,
-	}))
-	return ctx
 }
 
 func (c clickhouseConnWrapper) Query(ctx context.Context, query string, args ...interface{}) (driver.Rows, error) {
-	return c.conn.Query(c.logComment(ctx), query, args...)
+	return c.conn.Query(c.addClickHouseSettings(ctx, query), query, args...)
 }
 
 func (c clickhouseConnWrapper) QueryRow(ctx context.Context, query string, args ...interface{}) driver.Row {
-	return c.conn.QueryRow(c.logComment(ctx), query, args...)
+	return c.conn.QueryRow(c.addClickHouseSettings(ctx, query), query, args...)
 }
 
 func (c clickhouseConnWrapper) Select(ctx context.Context, dest interface{}, query string, args ...interface{}) error {
-	return c.conn.Select(c.logComment(ctx), dest, query, args...)
+	return c.conn.Select(c.addClickHouseSettings(ctx, query), dest, query, args...)
 }
 
 func (c clickhouseConnWrapper) Exec(ctx context.Context, query string, args ...interface{}) error {
-	return c.conn.Exec(c.logComment(ctx), query, args...)
+	return c.conn.Exec(c.addClickHouseSettings(ctx, query), query, args...)
 }
 
 func (c clickhouseConnWrapper) AsyncInsert(ctx context.Context, query string, wait bool, args ...interface{}) error {
-	return c.conn.AsyncInsert(c.logComment(ctx), query, wait, args...)
+	return c.conn.AsyncInsert(c.addClickHouseSettings(ctx, query), query, wait, args...)
 }
 
 func (c clickhouseConnWrapper) PrepareBatch(ctx context.Context, query string, opts ...driver.PrepareBatchOption) (driver.Batch, error) {
-	return c.conn.PrepareBatch(c.logComment(ctx), query, opts...)
+	return c.conn.PrepareBatch(c.addClickHouseSettings(ctx, query), query, opts...)
 }
 
 func (c clickhouseConnWrapper) ServerVersion() (*driver.ServerVersion, error) {

pkg/query-service/app/logs/v3/enrich_query.go

@@ -153,6 +153,7 @@ func enrichFieldWithMetadata(field v3.AttributeKey, fields map[string]v3.Attribu
 		return field
 	}
 
+	// enrich with default values if metadata is not found
 	if field.Type == "" {
 		field.Type = v3.AttributeKeyTypeTag
 	}