presto-main/src/main/java/io/prestosql/type/TinyintOperators.java/TinyintOperators/indeterminate
class TinyintOperators:    @ScalarOperator(INDETERMINATE)
    @SqlType(StandardTypes.BOOLEAN)
    public static boolean indeterminate(@SqlType(StandardTypes.TINYINT) long value, @IsNull boolean isNull)
    {
        return isNull;
    }