guiyanakuang commented on pull request #30467: URL: https://github.com/apache/spark/pull/30467#issuecomment-732673623
> I remember the related discussion in #29645 Btw, other systems support this resolution? Google BigQuery and Amazon Athena are supposed to support nested arrays, but instead of analysing the nested data directly, they use utdf to unfold the data for analysis. Like this ```sql select c_column, d_column from table lateral view unnest(a.b.c, a.b.d) as c_column, d_column ``` However, the spark sql syntax analysis phase is exceptional because no extractor for nested arrays could be found. ---------------------------------------------------------------- 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. For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org
