ClickHouse/tests/queries/0_stateless/01035_lc_empty_part_bug.sh
Azat Khuzhin 1ce9293e97 Fix 01035_lc_empty_part_bug under stress tests
Found in [1]:

    2021.03.12 23:32:58.897190 [ 436606 ] {97a08a8f-4630-44f8-ba18-a94c6fabbded} <Information> test_13.lc_empty_part_bug: Waiting mutation: mutation_3.txt
    ...
    2021.03.12 23:32:58.900444 [ 374 ] {} <Debug> test_13.lc_empty_part_bug: Current max source part size for mutation is 0 but part size 1. Will not mutate part all_1_1_0_2. Max size depends not only on available space, but also on settings 'number_of_free_entries_in_pool_to_execute_mutation' and 'background_pool_size'
    ...

Hang check:

    query:                alter table lc_empty_part_bug modify column s LowCardinality(String);
    elapsed:              2156.396613506

  [1]: https://clickhouse-test-reports.s3.yandex.net/21511/d7d9638ceb6bd702f34a88ee54f8f83197e90af5/stress_test_(address).html#fail1
2021-03-13 10:31:19 +03:00

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#!/usr/bin/env bash
CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
# shellcheck source=../shell_config.sh
. "$CURDIR"/../shell_config.sh
# that test is failing on versions <= 19.11.12
${CLICKHOUSE_CLIENT} --multiquery --query="
DROP TABLE IF EXISTS lc_empty_part_bug;
create table lc_empty_part_bug (id UInt64, s String) Engine=MergeTree ORDER BY id SETTINGS number_of_free_entries_in_pool_to_execute_mutation=0;
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;
" --mutations_sync=1
echo 'Waited for mutation to finish'
${CLICKHOUSE_CLIENT} --multiquery --query="
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 lc_empty_part_bug;
" --mutations_sync=1