expr toString(number) toString(number % 10) expr_zero toString(1 / rand()) toString(rand() / 0xFFFFFFFF) toString(0xFFFFFFFF / rand()) toString(rand()) toString(rand64()) concat(toString(rand(1)), '.', toString(rand(2))) concat(toString(rand(1)), 'e', toString(rand(2) % 100)) concat(toString(rand64(1)), toString(rand64(2)), toString(rand64(3))) SELECT count() FROM numbers(10000000) WHERE NOT ignore(toFloat64({expr})) SELECT count() FROM zeros(10000000) WHERE NOT ignore(toFloat64({expr_zero}))