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Vibhatha Lakmal Abeykoon authored and GitHub committed 74756051c4f
ARROW-16855: [C++] Adding Read Relation ToProto (#13401) This is the initial PR to set the util functions and structure to include the `ToProto` functionality to relations. Here the objective is to create an ACERO relation by interpretting what is included in a Substrait-Relation. In this PR the `read` relation ToProto is added. Authored-by: Vibhatha Abeykoon <vibhatha@gmail.com> Signed-off-by: Weston Pace <weston.pace@gmail.com>