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

• Type: New Feature
• Status: In Progress
• Priority: Major
• Resolution: Unresolved
• Component/s: C++
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/33580

Language

C++

• Assignee: Yaron Gvili
• Reporter: Yaron Gvili
• Created: 29/Nov/22 14:41
• Updated: 11/Jan/23 12:00

Description

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.

Issue Links

• links to: GitHub Pull Request #14799