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https://issues.apache.org/jira/browse/CALCITE-4056?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Haisheng Yuan resolved CALCITE-4056.
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Fix Version/s: 1.24.0
Resolution: Fixed
Fixed in
[https://github.com/apache/calcite/commit/b00c1fd6e26b5e3cc1a810c9f862b184649cd1a6],
thanks for the review.
> Remove Digest from RelNode and RexNode
> --------------------------------------
>
> Key: CALCITE-4056
> URL: https://issues.apache.org/jira/browse/CALCITE-4056
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: Haisheng Yuan
> Priority: Major
> Fix For: 1.24.0
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> The digest is used everywhere (RelNode, RexNode, DataType), causing OOM
> easily for large queries or with complex expressions. Datatype is cached in
> global interner and can be reused. Unlike RelNode, RexNode is not stored in
> MEMO as a GROUP, causing it can't be shared. This makes Calcite can't scale
> for large queries, e.g. CALCITE-3784.
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