[jira] [Commented] (DRILL-1184) TPCH Query 19 on top of text data (0.01 GB) does not match the baselines generated through postgres

["Steven Phillips (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DRILL-1184?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14093256#comment-14093256 ] 

Steven Phillips commented on DRILL-1184:
----------------------------------------

The problem is that that the view is casting the decimal types as decimal, without specifying a precision or scale. It looks like drill is defaulting to 38 precision, 0 scale. So the decimal points are getting truncated from the extendedprice and discount fields.

If you modify the view to cast as, e.g. decimal(16,2), the answer matches postrgres.

> TPCH Query 19 on top of text data (0.01 GB) does not match the baselines generated through postgres
> ---------------------------------------------------------------------------------------------------
>
>                 Key: DRILL-1184
>                 URL: https://issues.apache.org/jira/browse/DRILL-1184
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Execution - Flow, Storage - Text & CSV
>            Reporter: Rahul Challapalli
>            Assignee: Steven Phillips
>             Fix For: 0.5.0
>
>         Attachments: views.txt
>
>
> git.commit.id.abbrev=e5c2da0
> Query : 
> select
>   sum(l.l_extendedprice* (1 - l.l_discount)) as revenue
> from
>   lineitem l,
>   part p
> where
>   p.p_partkey = l.l_partkey
>   and (
>   (
>     p.p_brand = 'Brand#41'
>     and p.p_container in ('SM CASE', 'SM BOX', 'SM PACK', 'SM PKG')
>     and l.l_quantity >= 2 and l.l_quantity <= 2 + 10
>     and p.p_size between 1 and 5
>     and l.l_shipmode in ('AIR', 'AIR REG')
>     and l.l_shipinstruct = 'DELIVER IN PERSON'
>   )
>   or
>   (
>     p.p_brand = 'Brand#13'
>     and p.p_container in ('MED BAG', 'MED BOX', 'MED PKG', 'MED PACK')
>     and l.l_quantity >= 14 and l.l_quantity <= 14 + 10
>     and p.p_size between 1 and 10
>     and l.l_shipmode in ('AIR', 'AIR REG')
>     and l.l_shipinstruct = 'DELIVER IN PERSON'
>   )
>   or
>   (
>     p.p_brand = 'Brand#55'
>     and p.p_container in ('LG CASE', 'LG BOX', 'LG PACK', 'LG PKG')
>     and l.l_quantity >= 23 and l.l_quantity <= 23 + 10
>     and p.p_size between 1 and 15
>     and l.l_shipmode in ('AIR', 'AIR REG')
>     and l.l_shipinstruct = 'DELIVER IN PERSON'
>   ))
> Results :
>   - Drill : 108600
>   - Postgres : 106598.6290
> Attached the DDL for the views created before running this query.



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