The following bug has been logged on the website:
Bug reference: 14027
Logged by: Ilya Matveychikov
Email address: matvejchikov@gmail.com
PostgreSQL version: 9.5.1
Operating system: Linux
Description:
postgres=# create table t (name text unique);
postgres=# select n_tup_ins from pg_stat_user_tables where relname='t';
n_tup_ins
-----------
0
postgres=# insert into t (name) values ('a');
INSERT 0 1
postgres=# select n_tup_ins from pg_stat_user_tables where relname='t';
n_tup_ins
-----------
1
postgres=# insert into t (name) values ('b');
INSERT 0 1
postgres=# select n_tup_ins from pg_stat_user_tables where relname='t';
n_tup_ins
-----------
2
postgres=# insert into t (name) values ('a');
ÐШÐÐÐÐ: повÑоÑÑÑÑееÑÑ Ð·Ð½Ð°Ñение клÑÑа наÑÑÑÐ°ÐµÑ Ð¾Ð³ÑаниÑение
ÑникалÑноÑÑи
"t_name_key"
ÐÐÐÐ ÐÐÐÐСТÐ: ÐлÑÑ "(name)=(a)" Ñже ÑÑÑеÑÑвÑеÑ.
postgres=# select n_tup_ins from pg_stat_user_tables where relname='t';
n_tup_ins
-----------
3