thevar1able/ClickHouse
1
0
Fork 0
mirror of https://github.com/ClickHouse/ClickHouse.git synced 2024-11-25 00:52:02 +00:00
Code Issues Packages Projects Releases Wiki Activity

Test case for altering to LowCardinality when data part is empty

Browse Source
This commit is contained in:
Mikhail Filimonov 2019-12-02 16:02:52 +01:00
parent 1142c142c8
commit 5228f5f2eb
2 changed files with 14 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
dbms/tests/queries/0_stateless/01035_lc_empty_part_bug.reference Normal file
View File

@ -0,0 +1,3 @@
wait for delete to finish 0
still alive
100

11
dbms/tests/queries/0_stateless/01035_lc_empty_part_bug.sql Normal file
View File

@ -0,0 +1,11 @@
-- that test is failing on versions <= 19.11.12
DROP TABLE IF EXISTS lc_empty_part_bug;
create table lc_empty_part_bug (id UInt64, s String) Engine=MergeTree ORDER BY id;
insert into lc_empty_part_bug select number as id, toString(rand()) from numbers(100);
alter table lc_empty_part_bug delete where id < 100;
SELECT 'wait for delete to finish', sleep(1);
alter table lc_empty_part_bug modify column s LowCardinality(String);
SELECT 'still alive';
insert into lc_empty_part_bug select number+100 as id, toString(rand()) from numbers(100);
SELECT count() FROM lc_empty_part_bug WHERE not ignore(*);
DROP TABLE IF EXISTS lc_empty_part_bug;