Jason Altekruse created DRILL-1388:
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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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