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https://issues.apache.org/jira/browse/HIVE-18375?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16312051#comment-16312051
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Paul Jackson commented on HIVE-18375:
-------------------------------------

This seems related. Posting as a comment, but perhaps it should be in its own 
bug report.

Order By cannot see fields if they are projected with an alias.

The first two queries fail with:
{code}SemanticException [Error 10004]: line 7:9 Invalid table alias or column 
reference 'emp_no': (possible column names are: f_4, f_3, f_5){code}
The last two succeed.
{code:SQL}
SELECT `first_name` `F_4`, `last_name` `F_5`
FROM `default`.`employees`
ORDER BY `emp_no` DESC;

SELECT `first_name` `F_4`, `emp_no` `F_3`, `last_name` `F_5`
FROM `default`.`employees`
ORDER BY `emp_no` DESC;

SELECT `first_name` `F_4`, `emp_no`, `last_name` `F_5`
FROM `default`.`employees`
ORDER BY `emp_no` DESC;

SELECT `first_name` `F_4`, `emp_no` `F_3`, `last_name` `F_5`
FROM `default`.`employees`
ORDER BY `F_3` DESC;
{code}

> Cannot ORDER by subquery fields unless they are selected
> --------------------------------------------------------
>
>                 Key: HIVE-18375
>                 URL: https://issues.apache.org/jira/browse/HIVE-18375
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>    Affects Versions: 2.3.2
>         Environment: Amazon AWS
> Release label:emr-5.11.0
> Hadoop distribution:Amazon 2.7.3
> Applications:Hive 2.3.2, Pig 0.17.0, Hue 4.0.1
> classification=hive-site,properties=[hive.strict.checks.cartesian.product=false,hive.mapred.mode=nonstrict]
>            Reporter: Paul Jackson
>            Priority: Minor
>
> Give these tables:
> {code:SQL}
> CREATE TABLE employees (
>     emp_no      INT,
>     first_name  VARCHAR(14),
>     last_name   VARCHAR(16)
> );
> insert into employees values
> (1, 'Gottlob', 'Frege'),
> (2, 'Bertrand', 'Russell'),
> (3, 'Ludwig', 'Wittgenstein');
> CREATE TABLE salaries (
>     emp_no      INT,
>     salary      INT,
>     from_date   DATE,
>     to_date     DATE
> );
> insert into salaries values
> (1, 10, '1900-01-01', '1900-01-31'),
> (1, 18, '1900-09-01', '1900-09-30'),
> (2, 15, '1940-03-01', '1950-01-01'),
> (3, 20, '1920-01-01', '1950-01-01');
> {code}
> This query returns the names of the employees ordered by their peak salary:
> {code:SQL}
> SELECT `employees`.`last_name`, `employees`.`first_name`, `t1`.`max_salary`
> FROM `default`.`employees`
> INNER JOIN
>  (SELECT `emp_no`, MAX(`salary`) `max_salary`
>   FROM `default`.`salaries`
>   WHERE `emp_no` IS NOT NULL AND `salary` IS NOT NULL
>   GROUP BY `emp_no`) AS `t1`
> ON `employees`.`emp_no` = `t1`.`emp_no`
> ORDER BY `t1`.`max_salary` DESC;
> {code}
> However, this should still work even if the max_salary is not part of the 
> projection:
> {code:SQL}
> SELECT `employees`.`last_name`, `employees`.`first_name`
> FROM `default`.`employees`
> INNER JOIN
>  (SELECT `emp_no`, MAX(`salary`) `max_salary`
>   FROM `default`.`salaries`
>   WHERE `emp_no` IS NOT NULL AND `salary` IS NOT NULL
>   GROUP BY `emp_no`) AS `t1`
> ON `employees`.`emp_no` = `t1`.`emp_no`
> ORDER BY `t1`.`max_salary` DESC;
> {code}
> However, that fails with this error:
> {code}
> Error while compiling statement: FAILED: SemanticException [Error 10004]: 
> line 9:9 Invalid table alias or column reference 't1': (possible column names 
> are: last_name, first_name)
> {code}
> FWIW, this also fails:
> {code:SQL}
> SELECT `employees`.`last_name`, `employees`.`first_name`, `t1`.`max_salary` 
> AS `max_sal`
> FROM `default`.`employees`
> INNER JOIN
>  (SELECT `emp_no`, MAX(`salary`) `max_salary`
>   FROM `default`.`salaries`
>   WHERE `emp_no` IS NOT NULL AND `salary` IS NOT NULL
>   GROUP BY `emp_no`) AS `t1`
> ON `employees`.`emp_no` = `t1`.`emp_no`
> ORDER BY `t1`.`max_salary` DESC;
> {code}
> But this succeeds:
> {code:SQL}
> SELECT `employees`.`last_name`, `employees`.`first_name`, `t1`.`max_salary` 
> AS `max_sal`
> FROM `default`.`employees`
> INNER JOIN
>  (SELECT `emp_no`, MAX(`salary`) `max_salary`
>   FROM `default`.`salaries`
>   WHERE `emp_no` IS NOT NULL AND `salary` IS NOT NULL
>   GROUP BY `emp_no`) AS `t1`
> ON `employees`.`emp_no` = `t1`.`emp_no`
> ORDER BY `max_sal` DESC;
> {code}



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