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From "Rahul Challapalli (JIRA)" <j...@apache.org>
Subject [jira] [Reopened] (DRILL-5002) Using hive's date functions on top of date column in parquet gives wrong results
Date Fri, 03 Feb 2017 18:22:51 GMT

     [ https://issues.apache.org/jira/browse/DRILL-5002?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Rahul Challapalli reopened DRILL-5002:
--------------------------------------

There was some mis-understanding. We are still seeing wrong results. Check the below case
with the hive plugin. The month should have been 2.
{code}
select l_shipdate, `month`(l_shipdate) from hive.lineitem where l_shipdate = date '1994-02-01'
limit 2;
+-------------+---------+
| l_shipdate  | EXPR$1  |
+-------------+---------+
| 1994-02-01  | 1       |
| 1994-02-01  | 1       |
+-------------+---------+
2 rows selected (0.28 seconds)
{code}

The same query from hive on the same parquet file returns the correct results
{code}
select l_shipdate, `month`(l_shipdate) from lineitem where l_shipdate = date '1994-02-01'
limit 2;
OK
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
1994-02-01	2
1994-02-01	2
Time taken: 0.536 seconds, Fetched: 2 row(s)
{code}

I attached the parquet file used and below is the hive ddl
{code}
create external table if not exists lineitem (
    l_orderkey int,
    l_partkey int,
    l_suppkey int,
    l_linenumber int,
    l_quantity double,
    l_extendedprice double,
    l_discount double,
    l_tax double,
    l_returnflag string,
    l_linestatus string,
    l_shipdate date,
    l_commitdate date,
    l_receiptdate date,
    l_shipinstruct string,
    l_shipmode string,
    l_comment string
)
STORED AS PARQUET
LOCATION '/drill/testdata/lineitem';
{code}

> Using hive's date functions on top of date column in parquet gives wrong results
> --------------------------------------------------------------------------------
>
>                 Key: DRILL-5002
>                 URL: https://issues.apache.org/jira/browse/DRILL-5002
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Functions - Hive, Storage - Parquet
>            Reporter: Rahul Challapalli
>            Assignee: Vitalii Diravka
>            Priority: Critical
>
> git.commit.id.abbrev=190d5d4
> Wrong Result 1 :
> {code}
> select l_shipdate, `month`(l_shipdate) from cp.`tpch/lineitem.parquet` where l_shipdate
= date '1994-02-01' limit 2;
> +-------------+---------+
> | l_shipdate  | EXPR$1  |
> +-------------+---------+
> | 1994-02-01  | 1       |
> | 1994-02-01  | 1       |
> +-------------+---------+
> {code}
> Wrong Result 2 : 
> {code}
> select l_shipdate, `day`(l_shipdate) from cp.`tpch/lineitem.parquet` where l_shipdate
= date '1998-06-02' limit 2;
> +-------------+---------+
> | l_shipdate  | EXPR$1  |
> +-------------+---------+
> | 1998-06-02  | 1       |
> | 1998-06-02  | 1       |
> +-------------+---------+
> {code}
> Correct Result :
> {code}
> select l_shipdate, `month`(l_shipdate) from cp.`tpch/lineitem.parquet` where l_shipdate
= date '1998-06-02' limit 2;
> +-------------+---------+
> | l_shipdate  | EXPR$1  |
> +-------------+---------+
> | 1998-06-02  | 6       |
> | 1998-06-02  | 6       |
> +-------------+---------+
> {code}
> It looks like we are getting wrong results when the 'day' is '01'. I only tried month
and day hive functions....but wouldn't be surprised if they have similar issues too.



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