[GitHub] spark issue #19773: [SPARK-22546][SQL] Supporting for changing column dataTy...
Github user xuanyuanking commented on the issue: https://github.com/apache/spark/pull/19773 @maropu @dongjoon-hyun Great thanks for your guidance ! ``` Apache Spark already supports changing column types as a part of schema evolution. Especially, ORC vectorized reader support upcasting although it's not the same with canCast. For the detail support Spark coverage, see SPARK-23007. It covered all built-in data source at that time. ``` Great thanks, I'll study these background soon. ``` Please note that every data sources have different capability. So, this PR needs to prevent ALTER TABLE CHANGE COLUMN for those data sources case-by-case. And, we need corresponding test cases. ``` Got it, I'll keep following the cases in this PR, I roughly split these into 4 tasks and update the description of this PR firstly. I'll pay attention to the corresponding test cases in each task. --- - To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org
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Github user xuanyuanking commented on the issue: https://github.com/apache/spark/pull/19773 gentle ping @maropu, could you help to review this? I'll keep follow up this. --- - To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org
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Github user xuanyuanking commented on the issue: https://github.com/apache/spark/pull/19773 @gatorsmile @maropu Please have a look about this, solving the conflicts takes me some time. Also cc @jiangxb1987 because the conflict mainly with #20696, also thanks for the work in #20696, the latest pr no longer need to do the extra work for partition column comment changing as before. --- - To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org
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Github user xuanyuanking commented on the issue: https://github.com/apache/spark/pull/19773 I'll resolve the conflicts today, thanks for ping me. --- - To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org
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Github user xuanyuanking commented on the issue: https://github.com/apache/spark/pull/19773 gental ping @gatorsmile --- - To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org
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Github user xuanyuanking commented on the issue: https://github.com/apache/spark/pull/19773 @jaceklaskowski Thanks for your review and comments, I rebased the branch and addressed all comments, this patch is now ready for next reviewing. --- - To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org
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