ClickHouse/tests/queries/0_stateless/01338_long_select_and_alter.sh

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#!/usr/bin/env bash
CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
. $CURDIR/../shell_config.sh
$CLICKHOUSE_CLIENT --query "DROP TABLE IF EXISTS alter_mt"
$CLICKHOUSE_CLIENT --query "CREATE TABLE alter_mt (key UInt64, value String) ENGINE=MergeTree() ORDER BY key"
$CLICKHOUSE_CLIENT --query "INSERT INTO alter_mt SELECT number, toString(number) FROM numbers(5)"
$CLICKHOUSE_CLIENT --query "SELECT count(distinct concat(value, '_')) FROM alter_mt WHERE not sleepEachRow(2)" &
# to be sure that select took all required locks
sleep 2
$CLICKHOUSE_CLIENT --query "ALTER TABLE alter_mt MODIFY COLUMN value UInt64"
$CLICKHOUSE_CLIENT --query "SELECT sum(value) FROM alter_mt"
wait
$CLICKHOUSE_CLIENT --query "SHOW CREATE TABLE alter_mt"
$CLICKHOUSE_CLIENT --query "DROP TABLE IF EXISTS alter_mt"