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https://issues.apache.org/jira/browse/SPARK-22739?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16623665#comment-16623665
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Aleksander Eskilson edited comment on SPARK-22739 at 9/21/18 2:10 PM:
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[~cloud_fan], could you perhaps link here the Spark issue (if any) and PR that
committed built-in Avro support to Spark?
I would like to take a look at how Avro support for Datasets that was created
through the PR on this ticket, and an additional PR in Spark-Avro (see
[#217|https://github.com/databricks/spark-avro/pull/217]), might be folded in
to the new code. I would imagine that process would be including the same
expressions this ticket would have included, and then the new AvroEncoder that
was to be included in the Spark-Avro project.
Happy to see hear Avro will be included in Spark-proper now!
cc: [~marmbrus]
was (Author: aeskilson):
[~cloud_fan], could you perhaps link here the Spark issue (if any) and PR that
committed built-in Avro support to Spark?
I would like to take a look at how Avro support for Datasets that was created
through the PR on this ticket, and an additional PR in Spark-Avro (see
[#217|https://github.com/databricks/spark-avro/pull/217]), might be folded in
to the new code. I would imagine that process would be including the same
expressions this ticket would have included, and then the new AvroEncoder that
was to be included in the Spark-Avro project.
cc: [~marmbrus]
> Additional Expression Support for Objects
> -----------------------------------------
>
> Key: SPARK-22739
> URL: https://issues.apache.org/jira/browse/SPARK-22739
> Project: Spark
> Issue Type: New Feature
> Components: SQL
> Affects Versions: 2.3.0
> Reporter: Aleksander Eskilson
> Priority: Major
>
> Some discussion in Spark-Avro [1] motivates additions and minor changes to
> the {{Objects}} Expressions API [2]. The proposed changes include
> * a generalized form of {{initializeJavaBean}} taking a sequence of
> initialization expressions that can be applied to instances of varying objects
> * an object cast that performs a simple Java type cast against a value
> * making {{ExternalMapToCatalyst}} public, for use in outside libraries
> These changes would facilitate the writing of custom encoders for varying
> objects that cannot already be readily converted to a statically typed
> dataset by a JavaBean encoder (e.g. Avro).
> [1] --
> https://github.com/databricks/spark-avro/pull/217#issuecomment-342599110
> [2] --
>
> https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects/objects.scala
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