# https://www.postgresql.org/docs/9.1/static/explicit-locking.html
if ( $this->wasDeadlock() ) {
if ( $this->explicitTrxActive() || $priorWritesPending ) {
# https://www.postgresql.org/docs/9.1/static/explicit-locking.html
if ( $this->wasDeadlock() ) {
if ( $this->explicitTrxActive() || $priorWritesPending ) {