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https://issues.apache.org/jira/browse/CALCITE-3244?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17879400#comment-17879400
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Julian Hyde commented on CALCITE-3244:
--------------------------------------
[~volodymyr], FYI, I used your fix in
https://github.com/vvysotskyi/calcite/tree/CALCITE-3244 (mentioned in a comment
above) to help me fix CALCITE-6559 (to be merged shortly). When AVG was being
applied to a column of type TINYINT or SMALLINT, a cast was introduced that
prevented a nullability cast from being removed. Thanks for the fix, and maybe
CALCITE-6559 will be a partial fix for this issue.
> RelDecorrelator unable to decorrelate expression with filter and aggregate on
> top
> ---------------------------------------------------------------------------------
>
> Key: CALCITE-3244
> URL: https://issues.apache.org/jira/browse/CALCITE-3244
> Project: Calcite
> Issue Type: Improvement
> Affects Versions: 1.20.0
> Reporter: benj
> Assignee: Danny Chen
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> Some very useful type of requests currently failed with:
> {code:java}
> SYSTEM ERROR: UnsupportedOperationException: Adding Implicit RowID column is
> not supported for ValuesPrel operator
> {code}
> Examples from DRILL-7050:
> {code:sql}
> select t1.id,
> (select count(t2.id)
> from (
> select 1 as id
> union all
> select 2 as id
> ) t2 where t2.id = t1.id)
> from (
> select 1 as id
> union all
> select 2 as id
> ) t1
> {code}
> {code:sql}
> SELECT t,
> (SELECT count(*) FROM
> (SELECT split(r,' ') AS r FROM
> (SELECT sub.t AS r)) AS x
> ,LATERAL(SELECT $unnest AS u FROM unnest(x.r))
> /* WHERE ... */) t2
> FROM
> (SELECT 'unnest is useful' AS t) sub
> {code}
>
> _Please note that in 1.18 the error for these requests was:_
> {code:java}
> Error: PLAN ERROR: Cannot convert RexNode to equivalent Drill expression.
> RexNode Class: org.apache.calcite.rex.RexCorrelVariable, RexNode Digest: $cor0
> {code}
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