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Merge pull request #5172 from yandex/system_columns_race_condition

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Added a test for race condition
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alexey-milovidov 2019-05-05 02:27:11 +03:00 committed by GitHub
commit ad3a475346
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2 changed files with 32 additions and 0 deletions
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dbms/tests/queries/0_stateless/00941_system_columns_race_condition.reference Normal file
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dbms/tests/queries/0_stateless/00941_system_columns_race_condition.sh Executable file
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#!/usr/bin/env bash
# Test fix for issue #5066
CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
. $CURDIR/../shell_config.sh
set -e
$CLICKHOUSE_CLIENT -q "DROP TABLE IF EXISTS alter_table"
$CLICKHOUSE_CLIENT -q "CREATE TABLE alter_table (a UInt8, b Int16, c Float32, d String, e Array(UInt8), f Nullable(UUID), g Tuple(UInt8, UInt16)) ENGINE = MergeTree ORDER BY a"
function thread1()
{
while true; do $CLICKHOUSE_CLIENT --query "SELECT * FROM system.columns FORMAT Null"; done
}
function thread2()
{
while true; do $CLICKHOUSE_CLIENT -n --query "ALTER TABLE alter_table ADD COLUMN h String; ALTER TABLE alter_table MODIFY COLUMN h UInt64; ALTER TABLE alter_table DROP COLUMN h;"; done
}
# https://stackoverflow.com/questions/9954794/execute-a-shell-function-with-timeout
export -f thread1;
export -f thread2;
timeout 5 bash -c thread1 &
timeout 5 bash -c thread2 &
wait
$CLICKHOUSE_CLIENT -q "DROP TABLE alter_table"