Add a few spans

Signed-off-by: sashayakovtseva <[email protected]>

internal/datastore/ydb/query.go

@@ -295,6 +295,9 @@ func executeDeleteQuery(
 	deleteRev revisions.TimestampRevision,
 	pred sq.Sqlizer,
 ) error {
+	ctx, span := tracer.Start(ctx, "executeDeleteQuery")
+	defer span.End()
+
 	return executeQuery(
 		ctx,
 		tablePathPrefix,
@@ -305,6 +308,9 @@ func executeDeleteQuery(
 
 // executeQuery is a helper for queries that don't care about result set.
 func executeQuery(ctx context.Context, tablePathPrefix string, executor queryExecutor, q sq.Yqliser) error {
+	ctx, span := tracer.Start(ctx, "executeQuery")
+	defer span.End()
+
 	sql, args, err := q.ToYQL()
 	if err != nil {
 		return fmt.Errorf("failed to build query: %w", err)

internal/datastore/ydb/readwrite.go

@@ -9,6 +9,7 @@ import (
 	"github.com/jzelinskie/stringz"
 	"github.com/ydb-platform/ydb-go-sdk/v3/table"
 	"github.com/ydb-platform/ydb-go-sdk/v3/table/types"
+	"go.opentelemetry.io/otel/attribute"
 	"go.opentelemetry.io/otel/trace"
 	"google.golang.org/protobuf/proto"
 
@@ -302,7 +303,8 @@ func (rw *ydbReadWriter) selectTuples(
 	ctx context.Context,
 	in []*core.RelationTuple,
 ) ([]*core.RelationTuple, error) {
-	span := trace.SpanFromContext(ctx)
+	ctx, span := tracer.Start(ctx, "selectTuples", trace.WithAttributes(attribute.Int("count", len(in))))
+	defer span.End()
 
 	if len(in) == 0 {
 		return nil, nil
@@ -339,6 +341,9 @@ func writeDefinitions[T coreDefinition](
 	defs []T,
 	useVT bool,
 ) error {
+	ctx, span := tracer.Start(ctx, "writeDefinitions", trace.WithAttributes(attribute.Int("count", len(defs))))
+	defer span.End()
+
 	if len(defs) == 0 {
 		return nil
 	}