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CombinePerKey and GroupByKey - Spark - [mail # dev]
...This should be fine. Dataset.groupByKey is a logical operation, not aphysical one (as in Spark wouldn’t always materialize all the groups inmemory).On Thu, Feb 28, 2019 at 1:46 AM Etienne Ch...
   Author: Reynold Xin , 2019-02-28, 18:23
[DISCUSS] SPIP: Relational Cache - Spark - [mail # dev]
...How is this different from materialized views?On Sun, Feb 24, 2019 at 3:44 PM Daoyuan Wang  wrote:> Hi everyone,>> We'd like to discuss our proposal of Spark relational cache i...
   Author: Reynold Xin , 2019-02-25, 00:35
[expand - 1 more] - [DISCUSS][SQL][PySpark] Column name support for SQL functions - Spark - [mail # dev]
...The challenge with the Scala/Java API in the past is that when there are multipe parameters, it'd lead to an explosion of function overloads. On Sun, Feb 24, 2019 at 3:22 PM, Felix Cheung &n...
   Author: Reynold Xin , 2019-02-25, 00:49
[expand - 1 more] - [VOTE] SPIP: Spark API for Table Metadata - Spark - [mail # dev]
...Ryan - can you take the public user facing API part out of that SPIP?In general it'd be better to have the SPIPs be higher level, and put the detailed APIs in a separate doc. Alternatively, ...
   Author: Reynold Xin , 2019-03-02, 00:51
[build system] speeding up maven build building only changed modules compared to master branch - Spark - [mail # dev]
...This might be useful to do.BTW, based on my experience with different build systems in the past few years (extensively SBT/Maven/Bazel, and to a less extent Gradle/Cargo), I think the longer...
   Author: Reynold Xin , 2019-01-28, 21:24
[build system] jenkins master needs reboot, temporary downtime - Spark - [mail # dev]
...Thanks for taking care of this, Shane!On Wed, Dec 19, 2018 at 9:45 AM, shane knapp  wrote:> > master is back up and building.> > On Wed, Dec 19, 2018 at 9:31 AM shane knapp ...
   Author: Reynold Xin , 2018-12-19, 18:10
[expand - 1 more] - Noisy spark-website notifications - Spark - [mail # dev]
...I think there is an infra ticket open for it right now.On Wed, Dec 19, 2018 at 6:58 PM Nicholas Chammas wrote:> Can we somehow disable these new email alerts coming through for the Spark&...
   Author: Reynold Xin , 2018-12-20, 02:59
[expand - 1 more] - Decimals with negative scale - Spark - [mail # dev]
...So why can't we just do validation to fail sources that don't support negative scale, if it is not supported? This way, we don't need to break backward compatibility in anyway and it becomes...
   Author: Reynold Xin , 2018-12-18, 18:08
[DISCUSS] Default values and data sources - Spark - [mail # dev]
...I'd only do any of the schema evolution things as add-on on top. This is an extremely complicated area and we could risk never shipping anything because there would be a lot of different req...
   Author: Reynold Xin , 2018-12-21, 18:11
[SQL] hash: 64-bits and seeding - Spark - [mail # dev]
...Rather than calling it hash64, it'd be better to just call it xxhash64. The reason being ten years from now, we probably would look back and laugh at a specific hash implementation. It'd be ...
   Author: Reynold Xin , 2019-03-07, 07:33