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https://issues.apache.org/jira/browse/CALCITE-3757?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Haisheng Yuan resolved CALCITE-3757.
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Fix Version/s: 1.23.0
Resolution: Fixed
Fixed in
https://github.com/apache/calcite/commit/0f7dcfbffdf2e2405c835d22af78dac7124a728f.
> When merging sets, relnodes may be reregistered multiple times
> --------------------------------------------------------------
>
> Key: CALCITE-3757
> URL: https://issues.apache.org/jira/browse/CALCITE-3757
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: Haisheng Yuan
> Priority: Major
> Fix For: 1.23.0
>
>
> In RelSet#mergeWith(),
> {code:java}
> // merge subsets
> for (RelSubset otherSubset : otherSet.subsets) {
> ......
> for (RelNode otherRel : otherSubset.getRels()) {
> planner.reregister(this, otherRel);
> }
> }
> {code}
> otherSubset.getRels() returns all the rels that satisfy the traitset. A
> relnode's traitset may satisfy many traitsets, hence it will be reregistered
> multiple times.
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