[jira] [Created] (ARROW-18417) [C++] Support emit info in Substrait extension-multi and AsOfJoin

["Yaron Gvili (Jira)" <ji...@apache.org>]

Yaron Gvili created ARROW-18417:
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             Summary: [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


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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