GitHub user rekhajoshm opened a pull request:
https://github.com/apache/spark/pull/9440
[Spark-11478] [ML] ML StringIndexer return inconsistent schema
```val data = sc.parallelize(Seq((0, "a"), (1, "b"), (2, "c"), (3, "a"),
(4, "a"), (5, "c")), 2)
val df = sqlContext.createDataFrame(data).toDF("id", "label")
val indexer = new StringIndexer()
.setInputCol("label")
.setOutputCol("labelIndex")
.fit(df)
val transformed = indexer.transform(df)
println(transformed.schema.toString())
println(indexer.transformSchema(df.schema))
```
Verified that two print of transformed schema return different nullable
StructType(StructField(id,IntegerType,false),
StructField(label,StringType,true), StructField(labelIndex,DoubleType,true))
StructType(StructField(id,IntegerType,false),
StructField(label,StringType,true), StructField(labelIndex,DoubleType,false))
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/rekhajoshm/spark SPARK-11478
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/9440.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 #9440
----
commit e3677c9fa9697e0d34f9df52442085a6a481c9e9
Author: Rekha Joshi <[email protected]>
Date: 2015-05-05T23:10:08Z
Merge pull request #1 from apache/master
Pulling functionality from apache spark
commit 106fd8eee8f6a6f7c67cfc64f57c1161f76d8f75
Author: Rekha Joshi <[email protected]>
Date: 2015-05-08T21:49:09Z
Merge pull request #2 from apache/master
pull latest from apache spark
commit 0be142d6becba7c09c6eba0b8ea1efe83d649e8c
Author: Rekha Joshi <[email protected]>
Date: 2015-06-22T00:08:08Z
Merge pull request #3 from apache/master
Pulling functionality from apache spark
commit 6c6ee12fd733e3f9902e10faf92ccb78211245e3
Author: Rekha Joshi <[email protected]>
Date: 2015-09-17T01:03:09Z
Merge pull request #4 from apache/master
Pulling functionality from apache spark
commit eae53fb16dccdb4eb072466cae2429083461e406
Author: Joshi <[email protected]>
Date: 2015-11-03T18:34:12Z
fix for ML StringIndexer inconsistent schema
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