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From "Jason Altekruse (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-1388) Incorrect results when projecting nulls
Date Mon, 08 Sep 2014 19:47:30 GMT
Jason Altekruse created DRILL-1388:

             Summary: Incorrect results when projecting nulls
                 Key: DRILL-1388
                 URL: https://issues.apache.org/jira/browse/DRILL-1388
             Project: Apache Drill
          Issue Type: Bug
            Reporter: Jason Altekruse
            Priority: Critical

While testing fixed 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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