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Posted to issues@spark.apache.org by "holdenk (JIRA)" <ji...@apache.org> on 2015/12/12 02:37:46 UTC

[jira] [Created] (SPARK-12300) Fix schema inferance on local collections

holdenk created SPARK-12300:
-------------------------------

             Summary: Fix schema inferance on local collections
                 Key: SPARK-12300
                 URL: https://issues.apache.org/jira/browse/SPARK-12300
             Project: Spark
          Issue Type: Bug
          Components: PySpark, SQL
            Reporter: holdenk
            Priority: Minor


Current schema inferance for local python collections halts as soon as there are no NullTypes. This is different than when we specify a sampling ratio of 1.0 on a distributed collection. This could result in incomplete schema information.

Repro:

{code}
input = [{"a": 1}, {"b": "coffee"}]
df = sqlContext.createDataFrame(input)
print df.schema
{code}

Discovered while looking at SPARK-2870



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