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From "Rahul Challapalli (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-4323) Hive Native Reader : A simple count(*) throws Incoming batch has an empty schema error
Date Thu, 28 Jan 2016 21:20:39 GMT
Rahul Challapalli created DRILL-4323:
----------------------------------------

             Summary: 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
            Priority: Critical


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



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