[GitHub] spark issue #15703: [SPARK-18186] Migrate HiveUDAFFunction to TypedImperativ...

2016-11-16 Thread liancheng
Github user liancheng commented on the issue:

https://github.com/apache/spark/pull/15703
  
Thanks everyone for the review!


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[GitHub] spark issue #15703: [SPARK-18186] Migrate HiveUDAFFunction to TypedImperativ...

2016-11-16 Thread yhuai
Github user yhuai commented on the issue:

https://github.com/apache/spark/pull/15703
  
LGTM. Merging to master.


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[GitHub] spark issue #15703: [SPARK-18186] Migrate HiveUDAFFunction to TypedImperativ...

2016-11-16 Thread yhuai
Github user yhuai commented on the issue:

https://github.com/apache/spark/pull/15703
  
Code changes looks good to me. Let's also do a benchmark to sanity check 
our implementation.


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[GitHub] spark issue #15703: [SPARK-18186] Migrate HiveUDAFFunction to TypedImperativ...

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2016-11-10 Thread SparkQA
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2016-11-10 Thread SparkQA
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[GitHub] spark issue #15703: [SPARK-18186] Migrate HiveUDAFFunction to TypedImperativ...

2016-11-10 Thread liancheng
Github user liancheng commented on the issue:

https://github.com/apache/spark/pull/15703
  
The last build failure was because of a logical conflict between this PR 
and the master branch. Resolving it.


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2016-11-09 Thread SparkQA
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2016-11-09 Thread SparkQA
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[GitHub] spark issue #15703: [SPARK-18186] Migrate HiveUDAFFunction to TypedImperativ...

2016-11-01 Thread liancheng
Github user liancheng commented on the issue:

https://github.com/apache/spark/pull/15703
  
OK, now it's ready for review and merge.

cc @yhuai @JoshRosen @cloud-fan 


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[GitHub] spark issue #15703: [SPARK-18186] Migrate HiveUDAFFunction to TypedImperativ...

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[GitHub] spark issue #15703: [SPARK-18186] Migrate HiveUDAFFunction to TypedImperativ...

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https://github.com/apache/spark/pull/15703
  
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 * This patch **fails Spark unit tests**.
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[GitHub] spark issue #15703: [SPARK-18186] Migrate HiveUDAFFunction to TypedImperativ...

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[GitHub] spark issue #15703: [SPARK-18186] Migrate HiveUDAFFunction to TypedImperativ...

2016-11-01 Thread SparkQA
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[GitHub] spark issue #15703: [SPARK-18186] Migrate HiveUDAFFunction to TypedImperativ...

2016-11-01 Thread liancheng
Github user liancheng commented on the issue:

https://github.com/apache/spark/pull/15703
  
It turned out that I didn't initialize Hive UDAF evaluators properly.

Quoted from commit message of my previous commit:

> Hive UDAFs are sensitive to aggregation mode, and must be initialized 
with proper modes before being used. Basically, it means that you can't use an 
evaluator initialized with mode `PARTIAL1` to merge two aggregation states 
(although it still works for aggregate functions whose partial result type is 
the same as the final result type).


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[GitHub] spark issue #15703: [SPARK-18186] Migrate HiveUDAFFunction to TypedImperativ...

2016-11-01 Thread SparkQA
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https://github.com/apache/spark/pull/15703
  
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 * This patch **fails Spark unit tests**.
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[GitHub] spark issue #15703: [SPARK-18186] Migrate HiveUDAFFunction to TypedImperativ...

2016-11-01 Thread tejasapatil
Github user tejasapatil commented on the issue:

https://github.com/apache/spark/pull/15703
  
There is no doubt that this PR is not going to make things better. I'm 
already sold :)



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[GitHub] spark issue #15703: [SPARK-18186] Migrate HiveUDAFFunction to TypedImperativ...

2016-11-01 Thread liancheng
Github user liancheng commented on the issue:

https://github.com/apache/spark/pull/15703
  
@tejasapatil Another point that I'd like to add is that even if the 
performance for a single UDAF like `GenericUDAFCollectList` regresses, you 
still have performance gains if such UDAFs are used together with other 
aggregate functions within a single query. Before this PR, all the aggregate 
functions have to be evaluated without partial aggregation support in this case.


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[GitHub] spark issue #15703: [SPARK-18186] Migrate HiveUDAFFunction to TypedImperativ...

2016-11-01 Thread SparkQA
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[GitHub] spark issue #15703: [SPARK-18186] Migrate HiveUDAFFunction to TypedImperativ...

2016-11-01 Thread liancheng
Github user liancheng commented on the issue:

https://github.com/apache/spark/pull/15703
  
I found that I'm handling bridged UDAFs properly, which caused a few test 
failures. Working on it.


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[GitHub] spark issue #15703: [SPARK-18186] Migrate HiveUDAFFunction to TypedImperativ...

2016-11-01 Thread liancheng
Github user liancheng commented on the issue:

https://github.com/apache/spark/pull/15703
  
@tejasapatil For `collect_set` and `collect_list`, we'll simply migrate 
them to `TypedImperativeAggregate` and so that they become Spark native 
aggregate functions. We can also handle other built-in Hive UDAFs that share 
the same issue in this approach.

In the long run, this PR is mostly useful for running legacy UDAFs 
developed by the users rather than Hive built-in ones since we'd prefer to 
migrate all the built-in ones to Spark at last.


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[GitHub] spark issue #15703: [SPARK-18186] Migrate HiveUDAFFunction to TypedImperativ...

2016-11-01 Thread tejasapatil
Github user tejasapatil commented on the issue:

https://github.com/apache/spark/pull/15703
  
This will surely improve performance for the UDAFs where the data shrinks 
(eg. `max` as you pointed out). I am not sure if it would be better for UDAFs 
like `GenericUDAFCollectSet`, `GenericUDAFCollectList` where the aggregation 
does not shrink the data (it might be worse because of conversion cost ?).

It would be good to see some perf numbers to compare (native Spark UDFs) vs 
(before this change) vs (after the change).


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[GitHub] spark issue #15703: [SPARK-18186] Migrate HiveUDAFFunction to TypedImperativ...

2016-10-31 Thread liancheng
Github user liancheng commented on the issue:

https://github.com/apache/spark/pull/15703
  
I can't reproduce those test failures when executing failed test cases 
individually. Seems that it's related to execution order. Still investigating.


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[GitHub] spark issue #15703: [SPARK-18186] Migrate HiveUDAFFunction to TypedImperativ...

2016-10-31 Thread rxin
Github user rxin commented on the issue:

https://github.com/apache/spark/pull/15703
  
cc @tejasapatil 


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[GitHub] spark issue #15703: [SPARK-18186] Migrate HiveUDAFFunction to TypedImperativ...

2016-10-31 Thread SparkQA
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[GitHub] spark issue #15703: [SPARK-18186] Migrate HiveUDAFFunction to TypedImperativ...

2016-10-31 Thread SparkQA
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[GitHub] spark issue #15703: [SPARK-18186] Migrate HiveUDAFFunction to TypedImperativ...

2016-10-31 Thread SparkQA
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[GitHub] spark issue #15703: [SPARK-18186] Migrate HiveUDAFFunction to TypedImperativ...

2016-10-31 Thread liancheng
Github user liancheng commented on the issue:

https://github.com/apache/spark/pull/15703
  
Will add more details in the PR description soon.


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