ClickHouse/tests/performance/empty_string_deserialization.xml

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<test>
<!-- gcc-8 generates 20% faster code than gcc-9
clang-8 generates more than two times slower code than gcc
-->
<create_query>CREATE TABLE empty_strings (s String) ENGINE = Log;</create_query>
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<fill_query>INSERT INTO empty_strings SELECT '' FROM zeros_mt(1000000000);</fill_query>
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<query>SELECT count() FROM empty_strings WHERE NOT ignore(s)</query>
<drop_query>DROP TABLE IF EXISTS empty_strings</drop_query>
</test>