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https://issues.apache.org/jira/browse/SPARK-8756?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Cheng Lian updated SPARK-8756:
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Shepherd: Cheng Lian
> Keep cached information and avoid re-calculating footers in ParquetRelation2
> ----------------------------------------------------------------------------
>
> Key: SPARK-8756
> URL: https://issues.apache.org/jira/browse/SPARK-8756
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Liang-Chi Hsieh
>
> Currently, in ParquetRelation2, footers are re-read every time refresh() is
> called. But we can check if it is possibly changed before we do the reading
> because reading all footers will be expensive when there are too many
> partitions.
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