mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-21 07:01:59 +00:00
52 lines
2.2 KiB
Bash
Executable File
52 lines
2.2 KiB
Bash
Executable File
#!/usr/bin/env bash
|
|
|
|
set -e
|
|
|
|
CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
|
|
. $CURDIR/../shell_config.sh
|
|
|
|
|
|
$CLICKHOUSE_CLIENT -q "DROP TABLE IF EXISTS cannot_kill_query"
|
|
$CLICKHOUSE_CLIENT -q "CREATE TABLE cannot_kill_query (x UInt64) ENGINE = MergeTree ORDER BY x" &> /dev/null
|
|
$CLICKHOUSE_CLIENT -q "INSERT INTO cannot_kill_query SELECT * FROM numbers(10000000)" &> /dev/null
|
|
|
|
# This SELECT query will run for a long time. It's used as bloker for ALTER query. It will be killed with SYNC kill.
|
|
query_for_pending="SELECT count() FROM cannot_kill_query WHERE NOT ignore(sleep(1)) SETTINGS max_threads = 1, max_block_size = 1"
|
|
$CLICKHOUSE_CLIENT -q "$query_for_pending" &>/dev/null &
|
|
|
|
sleep 1 # queries should be in strict order
|
|
|
|
# This ALTER query will wait until $query_for_pending finished. Also it will block $query_to_kill.
|
|
$CLICKHOUSE_CLIENT -q "ALTER TABLE cannot_kill_query MODIFY COLUMN x UInt64" &>/dev/null &
|
|
|
|
sleep 1
|
|
|
|
# This SELECT query will also run for a long time. Also it's blocked by ALTER query. It will be killed with ASYNC kill.
|
|
# This is main idea which we check -- blocked queries can be killed with ASYNC kill.
|
|
query_to_kill="SELECT sum(1) FROM cannot_kill_query WHERE NOT ignore(sleep(1)) SETTINGS max_threads = 1"
|
|
$CLICKHOUSE_CLIENT -q "$query_to_kill" &>/dev/null &
|
|
|
|
sleep 1 # just to be sure that kill of $query_to_kill will be executed after $query_to_kill.
|
|
|
|
# Kill $query_to_kill with ASYNC kill. We will check that information about KILL is not lost.
|
|
$CLICKHOUSE_CLIENT -q "KILL QUERY WHERE query='$query_to_kill' ASYNC" &>/dev/null
|
|
|
|
sleep 1
|
|
|
|
# Kill $query_for_pending SYNC. This query is not blocker, so it should be killed fast.
|
|
timeout 20 $CLICKHOUSE_CLIENT -q "KILL QUERY WHERE query='$query_for_pending' SYNC" &>/dev/null
|
|
|
|
# Both queries have to be killed, doesn't matter with SYNC or ASYNC kill
|
|
for run in {1..15}
|
|
do
|
|
sleep 1
|
|
no_first_query=`$CLICKHOUSE_CLIENT -q "SELECT count() FROM system.processes where query='$query_for_pending'"`
|
|
no_second_query=`$CLICKHOUSE_CLIENT -q "SELECT count() FROM system.processes where query='$query_to_kill'"`
|
|
if [ $no_first_query == "0" ] && [ $no_second_query == "0" ]; then
|
|
echo "killed"
|
|
break
|
|
fi
|
|
done
|
|
|
|
$CLICKHOUSE_CLIENT -q "DROP TABLE IF EXISTS cannot_kill_query" &>/dev/null
|