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[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
[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 , 2018-12-04, 10:05
[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
Should python-2 be supported in Spark 3.0? - Spark - [mail # user]
...As Reynold pointed out, we don't have to drop Python 2 support right offthe bat. We can just deprecate it with Spark 3.0, which would allow us toactually drop it at a later 3.x release.On Sa...
   Author: Nicholas Chammas , 2018-09-15, 18:18
Python friendly API for Spark 3.0 - Spark - [mail # dev]
...Do we need to ditch Python 2 support to provide type hints? I don’t thinkso.Python lets you specify typing stubs that provide the same benefit withoutforcing Python 3.2018년 9월 14일 (금) 오후 8:0...
   Author: Nicholas Chammas , 2018-09-15, 00:38
[SPARK-18084] write.partitionBy() does not recognize nested columns that select() can access - Spark - [issue]
...Here's a simple repro in the PySpark shell:from pyspark.sql import Rowrdd = spark.sparkContext.parallelize([Row(a=Row(b=5))])df = spark.createDataFrame(rdd)df.printSchema()df.select('a.b').s...
http://issues.apache.org/jira/browse/SPARK-18084    Author: Nicholas Chammas , 2018-09-11, 14:19
Joining DataFrames derived from the same source yields confusing/incorrect results - Spark - [mail # dev]
...Dunno if I made a silly mistake, but I wanted to bring some attention tothis issue in case there was something serious going on here that mightaffect the upcoming release.https://issues.apac...
   Author: Nicholas Chammas , 2018-08-29, 16:44
[SPARK-17025] Cannot persist PySpark ML Pipeline model that includes custom Transformer - Spark - [issue]
...Following the example in this Databricks blog post under "Python tuning", I'm trying to save an ML Pipeline model.This pipeline, however, includes a custom transformer. When I try to save th...
http://issues.apache.org/jira/browse/SPARK-17025    Author: Nicholas Chammas , 2018-08-23, 11:32