ClickHouse/tests/performance/count.xml

<test>
    <create_query>CREATE TABLE data(k UInt64, v UInt64) ENGINE = MergeTree ORDER BY k</create_query>

    <fill_query>INSERT INTO data SELECT number, 1 from numbers(10000000)</fill_query>

    <query tag='count_10M' short='1'>SELECT count() FROM data</query>

    <drop_query>DROP TABLE IF EXISTS data</drop_query>
</test>
Optimize count() Choose the smallest column to count if possible. 2019-07-16 17:13:12 +00:00			`<test>`
			`<create_query>CREATE TABLE data(k UInt64, v UInt64) ENGINE = MergeTree ORDER BY k</create_query>`

			`<fill_query>INSERT INTO data SELECT number, 1 from numbers(10000000)</fill_query>`

fix more queries 2020-06-26 19:11:43 +00:00			`<query tag='count_10M' short='1'>SELECT count() FROM data</query>`
Optimize count() Choose the smallest column to count if possible. 2019-07-16 17:13:12 +00:00
			`<drop_query>DROP TABLE IF EXISTS data</drop_query>`
			`</test>`