[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-27 Thread ueshin
Github user ueshin commented on the issue:

https://github.com/apache/spark/pull/18655
  
@BryanCutler @wesm @cpcloud I filed a JIRA issue for decimal type support 
[SPARK-21552](https://issues.apache.org/jira/browse/SPARK-21552) and sent a pr 
for it as WIP #18754.
Let's move on there for discussing decimal type support.


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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-27 Thread cloud-fan
Github user cloud-fan commented on the issue:

https://github.com/apache/spark/pull/18655
  
LGTM, merging to master!


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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

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2017-07-26 Thread SparkQA
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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-26 Thread ueshin
Github user ueshin commented on the issue:

https://github.com/apache/spark/pull/18655
  
Jenkins, retest this please.


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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-25 Thread SparkQA
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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-25 Thread BryanCutler
Github user BryanCutler commented on the issue:

https://github.com/apache/spark/pull/18655
  
+1 on holding off for `DecimalType` support


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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-25 Thread cloud-fan
Github user cloud-fan commented on the issue:

https://github.com/apache/spark/pull/18655
  
yes let leave decimal support for folllow-ups


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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-25 Thread ueshin
Github user ueshin commented on the issue:

https://github.com/apache/spark/pull/18655
  
@BryanCutler @wesm @cpcloud Thank you for reviewing this.
If the remaining issue here is only `DecimalType` support, I'd like to 
separate it from this pr and merge this first to avoid duplicating efforts 
around writers.
What do you think?


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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-25 Thread wesm
Github user wesm commented on the issue:

https://github.com/apache/spark/pull/18655
  
There are a bunch of open JIRAs about decimals in Arrow: 
https://issues.apache.org/jira/issues/?filter=12334829=project%20%3D%20ARROW%20AND%20status%20in%20(%22In%20Review%22%2C%20Open%2C%20%22In%20Progress%22%2C%20Reopened)%20AND%20text%20~%20%22decimal%22
 between these JIRAs and the mailing list if would be good to come up with a 
game plan for integration tests between Java and C++ (and thus Python) so we 
can enable Spark to send Python decimals


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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-25 Thread cpcloud
Github user cpcloud commented on the issue:

https://github.com/apache/spark/pull/18655
  
Based on this code: 
https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/ColumnType.scala#L429-L547

It looks like there are two types:

1. 8 byte compact decimal that fits in a Java `long`
2. Up to length 16 `Array[byte]` representation (based on the `BINARY`) 
type.

I think Arrow's Decimal representation in Java is almost identical to this.

Looking at the `BigInteger` Java implementation (which is what `BigDecimal` 
sits on top of) the sign is carried around in the first `byte` of the array.


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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-25 Thread wesm
Github user wesm commented on the issue:

https://github.com/apache/spark/pull/18655
  
On DecimalType, I want to point out that we haven't hardened the memory 
format and integration tests between Java<->C++ within Arrow. It would be great 
if you could help with this -- we ran into a problem in C++ where we needed an 
extra sign bit with 16-byte high precision decimals. So we have 3 memory 
representations:

- 4 byte decimals (low precision)
- 8 byte
- 16 byte plus sign bitmap

What is Spark's internal memory representation? cc @cpcloud


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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-19 Thread ueshin
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Jenkins, retest this please.


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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-18 Thread SparkQA
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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-18 Thread ueshin
Github user ueshin commented on the issue:

https://github.com/apache/spark/pull/18655
  
I see, I'll move files back to `arrow` package.


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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-18 Thread BryanCutler
Github user BryanCutler commented on the issue:

https://github.com/apache/spark/pull/18655
  
> For ArrowConverters, I thought we can skip the intermediate 
ArrowRecordBatch creation in ArrowConverters.toPayloadIterator(). What do you 
think about that?

Ok, I see.  By using `ArrowWriter` directly on the root, then the 
`ArrowFileWriter` can use that same root in creating the Byte array.  So no 
need to create an intermediate `ArrowRecordBatch`.  That sounds good to me!

> For ColumnWriter, at first I'd like to support complex types like 
ArrayType and StructType, so I refactored it based on your ColumnWriter 
implementation. And then I renamed and moved the package 

That's fine, but do they need to be in `o.a.s.sql.execution.vectorized`?  
If so, then what's the point of having a `o.a.s.sql.execution.arrow` package if 
`ArrowUtils` and `ArrowWriter` are not even there?


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2017-07-18 Thread AmplabJenkins
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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-18 Thread SparkQA
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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-18 Thread ueshin
Github user ueshin commented on the issue:

https://github.com/apache/spark/pull/18655
  
@BryanCutler I'd like to share the motivation of refactoring 
`ArrowConverters` and `ColumnWriter`.

For `ColumnWriter`, at first I'd like to support complex types like 
`ArrayType` and `StructType`, so I refactored it based on your `ColumnWriter` 
implementation. And then I renamed and moved the package so that we can also 
use it for pandas UDF as @cloud-fan mentioned. As you might see before, I'll 
introduce `ArrowColumnVector` as a reader for Arrow vectors as well.

For `ArrowConverters`, I thought we can skip the intermediate 
`ArrowRecordBatch` creation in `ArrowConverters.toPayloadIterator()`. What do 
you think about that?

Thanks!


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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-18 Thread SparkQA
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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-18 Thread AmplabJenkins
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https://github.com/apache/spark/pull/18655
  
Merged build finished. Test FAILed.


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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-18 Thread ueshin
Github user ueshin commented on the issue:

https://github.com/apache/spark/pull/18655
  
Jenkins, retest this please.


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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-18 Thread AmplabJenkins
Github user AmplabJenkins commented on the issue:

https://github.com/apache/spark/pull/18655
  
Test FAILed.
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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-18 Thread SparkQA
Github user SparkQA commented on the issue:

https://github.com/apache/spark/pull/18655
  
**[Test build #79696 has 
finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/79696/testReport)**
 for PR 18655 at commit 
[`8ffedda`](https://github.com/apache/spark/commit/8ffedda9f05d379d700aef95dca049a751374f87).
 * This patch **fails due to an unknown error code, -9**.
 * This patch merges cleanly.
 * This patch adds no public classes.


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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-18 Thread SparkQA
Github user SparkQA commented on the issue:

https://github.com/apache/spark/pull/18655
  
**[Test build #79696 has 
started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/79696/testReport)**
 for PR 18655 at commit 
[`8ffedda`](https://github.com/apache/spark/commit/8ffedda9f05d379d700aef95dca049a751374f87).


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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-17 Thread ueshin
Github user ueshin commented on the issue:

https://github.com/apache/spark/pull/18655
  
Thank you for your comments.
I agree that we should split this into smaller PRs. I'll push another 
commit to remove `ArrowColumnVector` from this as soon as possible.


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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-17 Thread cloud-fan
Github user cloud-fan commented on the issue:

https://github.com/apache/spark/pull/18655
  
yea let's put `ArrowColumnVector` and its tests in a new PR and merge that 
first.

`ArrowWriter` will also be used for pandas UDF, see 
https://issues.apache.org/jira/browse/SPARK-21190 for more details, so it makes 
sense to move it to a separated file.


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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-17 Thread BryanCutler
Github user BryanCutler commented on the issue:

https://github.com/apache/spark/pull/18655
  
Thanks for this @ueshin.  I agree with @kiszk that it would be easier to 
review if you can split this into smaller PRs, maybe keep the additional type 
support separate?  I'm all for refactoring this too, but could you elaborate 
with some details on why you are refactoring `ColumnWriter` and 
`ArrowConverters`?  Thanks!


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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-17 Thread kiszk
Github user kiszk commented on the issue:

https://github.com/apache/spark/pull/18655
  
Good feature, but can we split this PR into smaller PRs for ease of review 
since it looks large?
For example, since `ArrowColumnVector` is not used in refactored code, this 
part can be moved to another PR.


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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-17 Thread AmplabJenkins
Github user AmplabJenkins commented on the issue:

https://github.com/apache/spark/pull/18655
  
Merged build finished. Test PASSed.


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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-17 Thread AmplabJenkins
Github user AmplabJenkins commented on the issue:

https://github.com/apache/spark/pull/18655
  
Test PASSed.
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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-17 Thread SparkQA
Github user SparkQA commented on the issue:

https://github.com/apache/spark/pull/18655
  
**[Test build #79668 has 
finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/79668/testReport)**
 for PR 18655 at commit 
[`58cd465`](https://github.com/apache/spark/commit/58cd46506b02800269380f7c8acb5f9825664cad).
 * This patch passes all tests.
 * This patch merges cleanly.
 * This patch adds no public classes.


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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-17 Thread SparkQA
Github user SparkQA commented on the issue:

https://github.com/apache/spark/pull/18655
  
**[Test build #79668 has 
started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/79668/testReport)**
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[`58cd465`](https://github.com/apache/spark/commit/58cd46506b02800269380f7c8acb5f9825664cad).


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[GitHub] spark issue #18655: [SPARK-21440][SQL][PYSPARK] Refactor ArrowConverters and...

2017-07-17 Thread ueshin
Github user ueshin commented on the issue:

https://github.com/apache/spark/pull/18655
  
cc @cloud-fan @BryanCutler 


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