presto-main/src/main/java/io/prestosql/type/BooleanOperators.java/BooleanOperators/hashCode
class BooleanOperators:    @ScalarOperator(HASH_CODE)
    @SqlType(StandardTypes.BIGINT)
    public static long hashCode(@SqlType(StandardTypes.BOOLEAN) boolean value)
    {
        return value ? 1231 : 1237;
    }