Merge branch 'ka/fix/query-statistics-null' into 'master'

Do not fail when query stats are missing

See merge request !163



Merged-by: Prabakaran Murugesan <pmurugesan@gitlab.com>
Approved-by: Prabakaran Murugesan <pmurugesan@gitlab.com>
Co-authored-by: Krasimir Angelov <kangelov@gitlab.com>