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https://issues.apache.org/jira/browse/SPARK-19641?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15939547#comment-15939547
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Nathan Howell commented on SPARK-19641:
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[~hyukjin.kwon], I'm super busy through next Tuesday. I can get it open it
before then but probably won't have time to do any work on it until later in
the week. Are you trying to get this in before the 2.2 branch?
> JSON schema inference in DROPMALFORMED mode produces incorrect schema
> ---------------------------------------------------------------------
>
> Key: SPARK-19641
> URL: https://issues.apache.org/jira/browse/SPARK-19641
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.1.0
> Reporter: Nathan Howell
>
> In {{DROPMALFORMED}} mode the inferred schema may incorrectly contain no
> columns. This occurs when one document contains a valid JSON value (such as a
> string or number) and the other documents contain objects or arrays.
> When the default case in {{JsonInferSchema.compatibleRootType}} is reached
> when merging a {{StringType}} and a {{StructType}} the resulting type will be
> a {{StringType}}, which is then discarded because a {{StructType}} is
> expected.
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