HyukjinKwon opened a new pull request #25993: [DO-NOT-MERGE][R] Install Arrow and test Arrow optimization in AppVeyor build URL: https://github.com/apache/spark/pull/25993 ### What changes were proposed in this pull request? This PR proposes to install Arrow and test Arrow optimization in AppVeyor build. We're currently not testing this in CI. ### Why are the changes needed? To check if there's any regression and if it works correctly. ### Does this PR introduce any user-facing change? No ### How was this patch tested? AppVeyor
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