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Posted to issues@ignite.apache.org by "Stanilovsky Evgeny (Jira)" <ji...@apache.org> on 2021/07/23 08:59:00 UTC
[jira] [Commented] (IGNITE-13744) Calcite. Use TableSpool for
IgniteNestedLoopJoin
[ https://issues.apache.org/jira/browse/IGNITE-13744?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17386098#comment-17386098 ]
Stanilovsky Evgeny commented on IGNITE-13744:
---------------------------------------------
[~korlov] i rewrite PR take into account you *Spool serialization suggestions, i also fix (Table|Index)Scan costs, seems in ai master it more efficient.
> Calcite. Use TableSpool for IgniteNestedLoopJoin
> ------------------------------------------------
>
> Key: IGNITE-13744
> URL: https://issues.apache.org/jira/browse/IGNITE-13744
> Project: Ignite
> Issue Type: Bug
> Components: sql
> Reporter: Taras Ledkov
> Assignee: Stanilovsky Evgeny
> Priority: Minor
> Labels: calcite, calcite2-required, calcite3-required
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Now {{NestedLoopJoinNode}} uses internal buffer to save all rows of the right input.
> We have to do refactoring {{IgniteNestedLoopJoin}} to use rewind of the right input and use TableSpool for not rewindable inputs.
> This refactoring separates implementation the join logic from materialization of the right input if it is needed. In the future we can use disk offload for TableSpool etc.
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