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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2022/03/08 19:26:08 UTC

[GitHub] [arrow] zeyuanxy commented on pull request #12579: ARROW-15829: [C++] Support SetNull in NumericalBuilder

zeyuanxy commented on pull request #12579:
URL: https://github.com/apache/arrow/pull/12579#issuecomment-1062123925


   > Do you have an actual use case for this?
   
   Yeah. We have an operator building a sample over streaming data using reservoir sampling. This requires making updates to the builders. We made our own builder implementations (e.g., for numerical we use a value builder and a uint8 builder for nullness; for string we use a vector for value), and we realized for numerical builder, it is straightforward to support it in arrow. Therefore we did this PR.


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