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https://issues.apache.org/jira/browse/PHOENIX-4139?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16212872#comment-16212872
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James Taylor commented on PHOENIX-4139:
---------------------------------------
Sounds like you're honing in on the root cause, [~cskrabak] & [~Dumindux]. We
need to understand *why* the accessor.hasSeparator is not set when it should
be. Usually this is due to the types being subtly different between the
original data being scanned and the data returned from the server (which in
this case is in the row key since you're doing a group by).
> select distinct with identical aggregations return weird values
> ----------------------------------------------------------------
>
> Key: PHOENIX-4139
> URL: https://issues.apache.org/jira/browse/PHOENIX-4139
> Project: Phoenix
> Issue Type: Bug
> Affects Versions: 4.12.0
> Environment: minicluster
> Reporter: Csaba Skrabak
> Assignee: Csaba Skrabak
> Priority: Minor
> Fix For: 4.13.0
>
> Attachments: PHOENIX-4139.patch
>
>
> From sme-hbase hipchat room:
> Pulkit Bhardwaj·10:31
> i'm seeing a weird issue with phoenix, appreciate some thoughts
> Created a simple table in phoenix
> {noformat}
> 0: jdbc:phoenix:> create table test_select(nam VARCHAR(20), address
> VARCHAR(20), id BIGINT
> . . . . . . . . > constraint my_pk primary key (id));
> 0: jdbc:phoenix:> upsert into test_select (nam, address,id)
> values('pulkit','badaun',1);
> 0: jdbc:phoenix:> select * from test_select;
> +---------+----------+-----+
> | NAM | ADDRESS | ID |
> +---------+----------+-----+
> | pulkit | badaun | 1 |
> +---------+----------+-----+
> 0: jdbc:phoenix:> select distinct 'harshit' as "test_column", nam from
> test_select;
> +--------------+---------+
> | test_column | NAM |
> +--------------+---------+
> | harshit | pulkit |
> +--------------+---------+
> 0: jdbc:phoenix:> select distinct 'harshit' as "test_column", trim(nam),
> trim(nam) from test_select;
> +--------------+----------------+----------------+
> | test_column | TRIM(NAM) | TRIM(NAM) |
> +--------------+----------------+----------------+
> | harshit | pulkitpulkit | pulkitpulkit |
> +--------------+----------------+----------------+
> {noformat}
> When I apply a trim on the nam column and use it multiple times, the output
> has the cell data duplicated!
> {noformat}
> 0: jdbc:phoenix:> select distinct 'harshit' as "test_column", trim(nam),
> trim(nam), trim(nam) from test_select;
> +--------------+-----------------------+-----------------------+-----------------------+
> | test_column | TRIM(NAM) | TRIM(NAM) |
> TRIM(NAM) |
> +--------------+-----------------------+-----------------------+-----------------------+
> | harshit | pulkitpulkitpulkit | pulkitpulkitpulkit |
> pulkitpulkitpulkit |
> +--------------+-----------------------+-----------------------+-----------------------+
> {noformat}
> Wondering if someone has seen this before??
> One thing to note is, if I remove the —— distinct 'harshit' as "test_column"
> —— The issue is not seen
> {noformat}
> 0: jdbc:phoenix:> select trim(nam), trim(nam), trim(nam) from test_select;
> +------------+------------+------------+
> | TRIM(NAM) | TRIM(NAM) | TRIM(NAM) |
> +------------+------------+------------+
> | pulkit | pulkit | pulkit |
> +------------+------------+------------+
> {noformat}
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