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https://issues.apache.org/jira/browse/DRILL-2019?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14279633#comment-14279633
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Aman Sinha commented on DRILL-2019:
-----------------------------------
There are 2 issues: The filter pushdown does not merge the two Filters together
into a single Filter. Even with this Drill should have worked correctly but
the problem is there's only 1 SelectionVectorRemover. There should be one
corresponding to each Filter.
BTW, here's a simpler query (with 1 table) to repro the problem:
{code}
0: jdbc:drill:zk=local> select count(*) from (select o_orderkey, o_custkey from
cp.`tpch/orders.parquet` o where o_custkey < 5) where o_custkey > 5;
+------------+
| EXPR$0 |
+------------+
| 50 |
+------------+
1 row selected
{code}
> Filter pushdown into the subquery when the subquery also has a filter is
> resulting in incorrect results
> -------------------------------------------------------------------------------------------------------
>
> Key: DRILL-2019
> URL: https://issues.apache.org/jira/browse/DRILL-2019
> Project: Apache Drill
> Issue Type: Bug
> Components: Execution - Operators, Query Planning & Optimization
> Reporter: Rahul Challapalli
> Assignee: Aman Sinha
> Priority: Critical
>
> git.commit.id.abbrev=b491cdb
> The below query on top of tpch 0.01 data should actually return 0 records.
> (Verified with postgres). However drill returns incorrect result
> {code}
> select count(*) from cp.`tpch/lineitem.parquet` l inner join (select
> o.o_orderkey, o.o_custkey from cp.`tpch/orders.parquet` o where o.o_custkey <
> 5) s on l.l_orderkey = s.o_orderkey and s.o_custkey > 5;
> +------------+
> | EXPR$0 |
> +------------+
> | 189 |
> +------------+
> {code}
> Marked as 'critical' since drill is reporting incorrect results
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