[jira] [Commented] (SPARK-20782) Dataset's isCached operator

["Takeshi Yamamuro (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-20782?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16015810#comment-16015810 ] 

Takeshi Yamamuro commented on SPARK-20782:
------------------------------------------

This short-cut makes some sense to me. WDYT? cc: [~smilegator][~cloud_fan]

> Dataset's isCached operator
> ---------------------------
>
>                 Key: SPARK-20782
>                 URL: https://issues.apache.org/jira/browse/SPARK-20782
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 2.3.0
>            Reporter: Jacek Laskowski
>            Priority: Trivial
>
> It'd be very convenient to have {{isCached}} operator that would say whether a query is cached in-memory or not.
> It'd be as simple as the following snippet:
> {code}
> // val q2: DataFrame
> spark.sharedState.cacheManager.lookupCachedData(q2.queryExecution.logical).isDefined
> {code}



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