SELECT positionCaseInsensitiveUTF8('懈谐芯谢泻邪.褉褍', '懈谐芯谢泻邪.褉裓0') AS res;
SELECT positionCaseInsensitiveUTF8('懈谐芯谢泻邪.褉褍', randomString(rand() % 100)) FROM system.numbers; -- { serverError 2 }
SELECT sum(ignore(positionCaseInsensitiveUTF8('懈谐芯谢泻邪.褉褍', randomString(rand() % 2)))) FROM numbers(1000000);
