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https://issues.apache.org/jira/browse/ARROW-18417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17640748#comment-17640748
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Yaron Gvili commented on ARROW-18417:
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cc [~westonpace]
> [C++] Support emit info in Substrait extension-multi and AsOfJoin
> -----------------------------------------------------------------
>
> Key: ARROW-18417
> URL: https://issues.apache.org/jira/browse/ARROW-18417
> Project: Apache Arrow
> Issue Type: New Feature
> Components: C++
> Reporter: Yaron Gvili
> Assignee: Yaron Gvili
> Priority: Major
>
> Currently, Arrow-Substrait does not handle emit info that may appear in an
> extension-multi in a Substrait plan. Besides the generic handling in the
> Arrow-Substrait extension API, specific handling for AsOfJoin is required,
> because AsOfJoinNode produces an output schema that is different than the one
> used in the emit info. In particular, the AsOfJoinNode output scheme does not
> include on- and by-keys of right tables.
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