GitHub user cloud-fan opened a pull request:
https://github.com/apache/spark/pull/22319
[SPARK-25044][SQL][followup] add back UserDefinedFunction.inputTypes
## What changes were proposed in this pull request?
This is a followup of https://github.com/apache/spark/pull/22259 .
Scala case class has a wide surface: apply, accessors, copy, etc.
In https://github.com/apache/spark/pull/22259 , we change the type of
`UserDefinedFunctions.inputTypes` from `Option[Seq[DataType]]` to
`Option[Seq[Schema]]`. This breaks backward compatibility.
This PR adds back `UserDefinedFunctions.inputTypes: Option[Seq[DataType]]`,
but does not add back the `apply` and `copy` methods, for 2 reasons.
1. the `apply` and `copy` methods are not meant to be public to end users.
2. Users can't call `apply` and `copy` with input types anymore. They must
provide the nullability information to get corrected result.
## How was this patch tested?
N/A
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/cloud-fan/spark revert
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/22319.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #22319
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commit e9c6fbc1b7298d7055d91a1a118eea3abd246d27
Author: Wenchen Fan <wenchen@...>
Date: 2018-09-03T04:33:18Z
add back UserDefinedFunction.inputTypes
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