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https://issues.apache.org/jira/browse/DRILL-7050?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16826862#comment-16826862
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ASF GitHub Bot commented on DRILL-7050:
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arina-ielchiieva commented on issue #1770: DRILL-7050: RexNode convert
exception in sub-query
URL: https://github.com/apache/drill/pull/1770#issuecomment-487010377
+1, thanks for making the changes.
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> RexNode convert exception in subquery
> -------------------------------------
>
> Key: DRILL-7050
> URL: https://issues.apache.org/jira/browse/DRILL-7050
> Project: Apache Drill
> Issue Type: Bug
> Affects Versions: 1.14.0, 1.15.0
> Reporter: Oleg Zinoviev
> Assignee: Volodymyr Vysotskyi
> Priority: Major
> Fix For: 1.17.0
>
>
> If the query contains a subquery whose filters are associated with the main
> query, an error occurs: *PLAN ERROR: Cannot convert RexNode to equivalent
> Drill expression. RexNode Class: org.apache.calcite.rex.RexCorrelVariable*
> Steps to reproduce:
> 1) Create source table (or view, doesn't matter)
> {code:sql}
> create table dfs.root.source as (
> select 1 as id union all select 2 as id
> )
> {code}
> 2) Execute query
> {code:sql}
> select t1.id,
> (select count(t2.id)
> from dfs.root.source t2 where t2.id = t1.id)
> from dfs.root.source t1
> {code}
> Reason:
> Method
> {code:java}org.apache.calcite.sql2rel.SqlToRelConverter.Blackboard.lookupExp{code}
> call {code:java}RexBuilder.makeCorrel{code} in some cases
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