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https://issues.apache.org/jira/browse/CALCITE-3209?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ruben Quesada Lopez resolved CALCITE-3209.
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Resolution: Fixed
Fixed in
https://github.com/apache/calcite/commit/9ba140ef66ad1e048789532211ddf8b3ca1cf8ec
Thanks for the PR [~jinxing6...@126.com]!
> When calling MutableMultiRel::setInput, exception thrown
> --------------------------------------------------------
>
> Key: CALCITE-3209
> URL: https://issues.apache.org/jira/browse/CALCITE-3209
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: jin xing
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.21.0
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> When digging code of materialization matching. I found the current
> implementation of {{MutableMultiRel::}}{{inputs}} is by an {{ImmutableList}},
> thus impossible to be changed by
>
> [https://github.com/apache/calcite/blob/master/core/src/main/java/org/apache/calcite/rel/mutable/MutableMultiRel.java#L42]
> {code:java}
> @Override public void setInput(int ordinalInParent, MutableRel input)
> {code}
> Seems a mistake.
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