- Statement "SELECT sum(n_tup_ins) AS ins, \
- sum(n_tup_upd) AS upd, \
- sum(n_tup_del) AS del, \
- sum(n_tup_hot_upd) AS hot_upd \
+ Statement "SELECT coalesce(sum(n_tup_ins), 0) AS ins, \
+ coalesce(sum(n_tup_upd), 0) AS upd, \
+ coalesce(sum(n_tup_del), 0) AS del, \
+ coalesce(sum(n_tup_hot_upd), 0) AS hot_upd \