nwt opened a new pull request, #14776: URL: https://github.com/apache/arrow/pull/14776
(*DenseUnionBuilder).Len and (*SparseUnionBuilder).Len always return 0. They should instead return the number of values appended. This bug exists because these methods are promoted (via unionBuilder) from (*builder).Len, which reads builder.length, but DenseUnionBuilder and SparseUnionBuilder don't update that field. Fix by adding a (*unionBuilder).Len implementation that calls unionBuilder.typesBuilder.Len. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: github-unsubscr...@arrow.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
