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From "Jason Altekruse (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DRILL-1388) Incorrect results when projecting nulls
Date Mon, 20 Apr 2015 23:48:59 GMT

     [ https://issues.apache.org/jira/browse/DRILL-1388?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jason Altekruse updated DRILL-1388:
-----------------------------------
    Component/s: Storage - Parquet

> Incorrect results when projecting nulls
> ---------------------------------------
>
>                 Key: DRILL-1388
>                 URL: https://issues.apache.org/jira/browse/DRILL-1388
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Storage - Parquet
>            Reporter: Jason Altekruse
>            Assignee: Jason Altekruse
>             Fix For: 0.8.0
>
>
> While testing fixes for the parquet nullable support I ran into an issue with unexpected
results. I was selecting several columns out of file parquet file, which supports project
pushdown. Currently the planner still includes a project operation after the scan in this
case (to properly modify schema in the case of array indexing, project pushdown into scans
is currently not supposed to be changing structure). I pulled the physical plan from the query
and ran it without the extra project (as I was not selecting any array values) and got the
expected results.
> Here is the query I ran, the file is too large to attach so you can e-mail me to get
a copy of it.
> select pig_schema,ss_sold_date_sk,ss_item_sk,ss_cdemo_sk,ss_addr_sk, ss_hdemo_sk from
store_sales



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