ClickHouse/tests/performance/casts.xml

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<test max_ignored_relative_change="0.2">
<settings>
<max_memory_usage>15G</max_memory_usage>
</settings>
<create_query>CREATE TABLE t (x UInt64) ENGINE = Memory</create_query>
<!-- use less threads to save memory -->
<fill_query>INSERT INTO t SELECT number AS x FROM numbers_mt(200000000) SETTINGS max_threads = 8</fill_query>
<drop_query>DROP TABLE IF EXISTS t</drop_query>
<query>SELECT cast(x, 'Int64'), cast(x, 'Int128'), cast(x, 'Int256'), cast(x, 'String'), cast(x, 'Decimal64(8)') FROM t FORMAT Null</query>
<query>SELECT accurateCast(x, 'Int64'), accurateCast(x, 'Int128'), accurateCast(x, 'Int256'), accurateCast(x, 'String'), accurateCast(x, 'Decimal64(8)') FROM t FORMAT Null</query>
<query>SELECT accurateCastOrNull(x, 'Int64'), accurateCastOrNull(x, 'Int128'), accurateCastOrNull(x, 'Int256'), accurateCastOrNull(x, 'String'), accurateCastOrNull(x, 'Decimal64(8)') FROM t FORMAT Null</query>
</test>