drop table if exists trunc; set default_table_engine='ReplicatedMergeTree'; create table trunc (n int, primary key n) engine=ReplicatedMergeTree('/test/1166/{database}', '1') partition by n % 10; insert into trunc select * from numbers(20); select count(), sum(n) from trunc; alter table trunc detach partition all; select count(), sum(n) from trunc; alter table trunc attach partition id '0'; alter table trunc attach partition id '1'; alter table trunc attach partition id '2'; alter table trunc attach partition id '3'; select count(), sum(n) from trunc; truncate trunc; select count(), sum(n) from trunc; drop table trunc; set default_table_engine='MergeTree'; create table trunc (n int, primary key n) partition by n % 10; insert into trunc select * from numbers(20); select count(), sum(n) from trunc; alter table trunc detach partition all; select count(), sum(n) from trunc; alter table trunc attach partition id '0'; alter table trunc attach partition id '1'; alter table trunc attach partition id '2'; alter table trunc attach partition id '3'; select count(), sum(n) from trunc; truncate trunc; select count(), sum(n) from trunc; drop table trunc;