[
https://issues.apache.org/jira/browse/DRILL-4323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15124470#comment-15124470
]
ASF GitHub Bot commented on DRILL-4323:
---------------------------------------
GitHub user hsuanyi opened a pull request:
https://github.com/apache/drill/pull/349
DRILL-4323: When converting HiveParquetScan To DrillParquetScan, do n…
…ot add Project when no column is needed to be read out from Scan (e.g.,
select count(*) from hive.table)
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/hsuanyi/incubator-drill DRILL-4323
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/drill/pull/349.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #349
----
commit f06ef505628e12131c48bc7747ca21b007c2d2b4
Author: Hsuan-Yi Chu <hsua...@usc.edu>
Date: 2016-01-29T21:20:12Z
DRILL-4323: When converting HiveParquetScan To DrillParquetScan, do not add
Project when no column is needed to be read out from Scan (e.g., select
count(*) from hive.table)
----
> Hive Native Reader : A simple count(*) throws Incoming batch has an empty
> schema error
> --------------------------------------------------------------------------------------
>
> Key: DRILL-4323
> URL: https://issues.apache.org/jira/browse/DRILL-4323
> Project: Apache Drill
> Issue Type: Bug
> Components: Storage - Hive
> Affects Versions: 1.5.0
> Reporter: Rahul Challapalli
> Assignee: Sean Hsuan-Yi Chu
> Priority: Critical
> Attachments: error.log
>
>
> git.commit.id.abbrev=3d0b4b0
> A simple count(*) query does not work when hive native reader is enabled
> {code}
> 0: jdbc:drill:zk=10.10.100.190:5181> select count(*) from customer;
> +---------+
> | EXPR$0 |
> +---------+
> | 100000 |
> +---------+
> 1 row selected (3.074 seconds)
> 0: jdbc:drill:zk=10.10.100.190:5181> alter session set
> `store.hive.optimize_scan_with_native_readers` = true;
> +-------+--------------------------------------------------------+
> | ok | summary |
> +-------+--------------------------------------------------------+
> | true | store.hive.optimize_scan_with_native_readers updated. |
> +-------+--------------------------------------------------------+
> 1 row selected (0.2 seconds)
> 0: jdbc:drill:zk=10.10.100.190:5181> select count(*) from customer;
> Error: SYSTEM ERROR: IllegalStateException: Incoming batch [#1341,
> ProjectRecordBatch] has an empty schema. This is not allowed.
> Fragment 0:0
> [Error Id: 4c867440-0fd3-4eda-922f-0f5eadcb1463 on qa-node191.qa.lab:31010]
> (state=,code=0)
> {code}
> Hive DDL for the table :
> {code}
> create table customer
> (
> c_customer_sk int,
> c_customer_id string,
> c_current_cdemo_sk int,
> c_current_hdemo_sk int,
> c_current_addr_sk int,
> c_first_shipto_date_sk int,
> c_first_sales_date_sk int,
> c_salutation string,
> c_first_name string,
> c_last_name string,
> c_preferred_cust_flag string,
> c_birth_day int,
> c_birth_month int,
> c_birth_year int,
> c_birth_country string,
> c_login string,
> c_email_address string,
> c_last_review_date string
> )
> STORED AS PARQUET
> LOCATION '/drill/testdata/customer'
> {code}
> Attached the log file with the stacktrace
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
