timmyb32r opened a new pull request, #11827: URL: https://github.com/apache/arrow-rs/pull/11827
# Which issue does this PR close? None — standalone bug fix. # Rationale for this change `Field::try_merge` accepted unions with different modes, even though sparse and dense unions have different physical layouts. The result retained the mode of `self`, silently ignoring the incompatible mode of the other field. # What changes are included in this PR? Return `ArrowError::SchemaError` when the union modes differ. # Are these changes tested? Added a regression test covering rejection of sparse/dense merges in both directions. It also verifies that unions with matching modes can still merge distinct variants. # Are there any significant user-facing changes? -- 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: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
