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https://issues.apache.org/jira/browse/HIVE-18537?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16353597#comment-16353597
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Amruth S commented on HIVE-18537:
---------------------------------
With just calcite libraries, the same table def and query works. The issue
comes only with hive classes overriding calcite's.
We have mitigated this currently by capturing the AssertionError and skipping
the optimization.
> [Calcite-CBO] Queries with a nested distinct clause and a windowing function
> seem to fail with calcite Assertion error
> ----------------------------------------------------------------------------------------------------------------------
>
> Key: HIVE-18537
> URL: https://issues.apache.org/jira/browse/HIVE-18537
> Project: Hive
> Issue Type: Bug
> Components: Hive
> Affects Versions: 2.3.2
> Reporter: Amruth S
> Priority: Critical
>
> Sample test case to re-produce the issue. The issue does not occur if
> *hive.cbo.enable=false*
> {code:java}
> create table test_cbo (
> `a` BIGINT,
> `b` STRING,
> `c` TIMESTAMP,
> `d` STRING
> );
> SELECT 1
> FROM
> (SELECT
> DISTINCT
> a AS a_,
> b AS b_,
> rank() over (partition BY a ORDER BY c DESC) AS c_,
> d AS d_
> FROM test_cbo
> WHERE b = 'some_filter' ) n
> WHERE c_ = 1;
> {code}
> Fails with,
> {code:java}
> Exception in thread "main" java.lang.AssertionError: Internal error: Cannot
> add expression of different type to set:
> set type is RecordType(BIGINT a_, INTEGER c_, VARCHAR(2147483647) CHARACTER
> SET "UTF-16LE" COLLATE "ISO-8859-1$en_US$primary" d_) NOT NULL
> expression type is RecordType(BIGINT a_, VARCHAR(2147483647) CHARACTER SET
> "UTF-16LE" COLLATE "ISO-8859-1$en_US$primary" c_, INTEGER d_) NOT NULL
> set is rel#112:HiveAggregate.HIVE.[](input=HepRelVertex#121,group={0, 2, 3})
> expression is HiveProject#123{code}
> This might be related to https://issues.apache.org/jira/browse/CALCITE-1868.
>
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