presto-main/src/main/java/io/prestosql/type/BooleanOperators.java/BooleanOperators/equal
class BooleanOperators:    @ScalarOperator(EQUAL)
    @SqlType(StandardTypes.BOOLEAN)
    @SqlNullable
    public static Boolean equal(@SqlType(StandardTypes.BOOLEAN) boolean left, @SqlType(StandardTypes.BOOLEAN) boolean right)
    {
        return left == right;
    }