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https://issues.apache.org/jira/browse/SPARK-5781?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15556480#comment-15556480
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Xiao Li commented on SPARK-5781:
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This sounds already resolved. Let me close it. Thanks!
> Add metadata files for JSON datasets
> ------------------------------------
>
> Key: SPARK-5781
> URL: https://issues.apache.org/jira/browse/SPARK-5781
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Yin Huai
>
> If we save a dataset in JSON format (e.g. through DataFrame.save), we should
> also persist the schema of the table. So, we can avoid inferring the schema
> when we want to query it in future.
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