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From "Aman Sinha (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (DRILL-2361) Column aliases cannot include dots
Date Mon, 16 Mar 2015 01:46:38 GMT

    [ https://issues.apache.org/jira/browse/DRILL-2361?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14362654#comment-14362654
] 

Aman Sinha edited comment on DRILL-2361 at 3/16/15 1:45 AM:
------------------------------------------------------------

[~dragoncurve] were you planning to update the patch or should I go ahead with committing
the current one?  I found the following queries generate the same error - the first one is
for a sort operator, second with joins. 
{code}
0: jdbc:drill:zk=local> select o_custkey as `x.y.z` from orders where o_orderkey < 5
order by `x.y.z`;
Query failed: UnsupportedOperationException: Field references must be singular names.
0: jdbc:drill:zk=local> select 1 from (select o_custkey as `x.y` from orders) o inner join
customer c on o.`x.y` = c.c_custkey;
Query failed: UnsupportedOperationException: Field references must be singular names.
{code}
Like Jacques suggested, I can create a separate JIRA to track the issue in general.


was (Author: amansinha100):
[~dragoncurve] were you planning to update the patch or should I go ahead with committing
the current one?  I found the following queries generate the same error - the first one is
for a sort operator, second with joins. 
{code}
0: jdbc:drill:zk=local> select o_custkey as `x.y.z` from orders where o_orderkey < 5
order by `x.y.z`;
Query failed: UnsupportedOperationException: Field references must be singular names.
0: jdbc:drill:zk=local> select 1 from (select o_custkey as `x.y` from orders) o inner join
customer c on o.`x.y` = c.c_custkey;
Query failed: UnsupportedOperationException: Field references must be singular names.
{code}
Like Jacques suggested, I can create a separate to track the issue in general.

> Column aliases cannot include dots
> ----------------------------------
>
>                 Key: DRILL-2361
>                 URL: https://issues.apache.org/jira/browse/DRILL-2361
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Query Planning & Optimization
>    Affects Versions: 0.7.0, 0.8.0
>            Reporter: Adam Gilmore
>            Assignee: Aman Sinha
>            Priority: Minor
>         Attachments: DRILL-2361.1.patch.txt
>
>
> The Drill query engine rejects column aliases for aggregates or group by fields where
the alias includes a dot.
> For example:
> {code}select count(*) as `test.field` from cp.`employee.json`;{code}
> throws an error with "Field references must be singular names."
> Having reviewed the code, I can't quite see a reason for it, and when using FieldReference.getWithQuotedRef
instead in AggPrelBase, the issue is alleviated with no visible side effects.
> I'm sure there was a reason for this code in FieldReference, but I can't seem to work
out why, and it seems entirely reasonable to allow a dot in a column alias.



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