better comment

Author: trzysiek

platform/database_common/log_manager.go

@@ -200,7 +200,8 @@ func (lm *LogManager) ResolveIndexPattern(ctx context.Context, schema schema.Reg
 	return util.Distinct(results), nil
 }
 
-// buildStringOfCountQuery builds query string which will be sent to DB
+// buildStringOfCountQuery builds string of count query which will be sent to DB (for 1 table).
+// If we query multiple tables at once, it needs to be called multiple times.
 // Takes care whether `table` is "normal" or virtual
 func (lm *LogManager) buildStringOfCountQuery(table *Table) string {
 	if table.VirtualTable {