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Suggestion on Join Approach with Spark - Spark - [mail # dev]
...This kind of question is for the User list, or for something like StackOverflow. It's not on topic here.The dev list (i.e. this list) is for discussions about the development ofSpark itself....
   Author: Nicholas Chammas , 2019-05-15, 18:04
[SPARK-25150] Joining DataFrames derived from the same source yields confusing/incorrect results - Spark - [issue]
...I have two DataFrames, A and B. From B, I have derived two additional DataFrames, B1 and B2. When joining A to B1 and B2, I'm getting a very confusing error:Join condition is missing or triv...
http://issues.apache.org/jira/browse/SPARK-25150    Author: Nicholas Chammas , 2019-04-09, 15:48
[PySpark] Revisiting PySpark type annotations - Spark - [mail # user]
...I think the annotations are compatible with Python 2 since Maciejimplemented them via stub files, which Python 2simply ignores. Folks using mypy  to check typeswill get the benefit whet...
   Author: Nicholas Chammas , 2019-01-25, 19:08
[expand - 1 more] - Ask for reviewing on Structured Streaming PRs - Spark - [mail # dev]
...OK, good to know, and that all makes sense. Thanks for clearing up myconcern.One of great things about Spark is, as you pointed out, that improvementsto core components benefit multiple feat...
   Author: Nicholas Chammas , 2019-01-15, 01:45
[SPARK-19217] Offer easy cast from vector to array - Spark - [issue]
...Working with ML often means working with DataFrames with vector columns. You can't save these DataFrames to storage (edit: at least as ORC) without converting the vector columns to array col...
http://issues.apache.org/jira/browse/SPARK-19217    Author: Nicholas Chammas , 2019-01-04, 10:41
[expand - 1 more] - Noisy spark-website notifications - Spark - [mail # dev]
...I'd prefer it if we disabled all git notifications for spark-website. Folkswho want to stay on top of what's happening with the site can simply watchthe repo on GitHub , no?On Wed, Dec 19, 2...
   Author: Nicholas Chammas , 2018-12-20, 03:22
[SPARK-18818] Window...orderBy() should accept an 'ascending' parameter just like DataFrame.orderBy() - Spark - [issue]
...It seems inconsistent that Window...orderBy() does not accept an ascending parameter, when DataFrame.orderBy() does.It's also slightly inconvenient since to specify a descending sort order y...
http://issues.apache.org/jira/browse/SPARK-18818    Author: Nicholas Chammas , 2018-12-13, 02:46
[expand - 4 more] - Documentation of boolean column operators missing? - Spark - [mail # dev]
...On Tue, 23 Oct 2018 at 21:32, Sean Owen  wrote:>>> The comments say that it is not possible to overload 'and' and 'or',>> which would have been more natural.>>> ...
   Author: Nicholas Chammas , 2018-10-23, 20:20
[VOTE] SPARK 2.4.0 (RC3) - Spark - [mail # dev]
...FYI I believe we have an open correctness issue here:https://issues.apache.org/jira/browse/SPARK-25150However, it needs review by another person to confirm whether it is indeeda correctness ...
   Author: Nicholas Chammas , 2018-10-10, 19:45
[VOTE] SPARK 2.4.0 (RC1) - Spark - [mail # dev]
...I believe -1 votes are merited only for correctness bugs and regressionssince the previous release.Does SPARK-23200 count as either?2018년 9월 17일 (월) 오전 9:40, Stavros Kontopoulos <[EMAIL P...
   Author: Nicholas Chammas , 2018-09-17, 13:53