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https://issues.apache.org/jira/browse/SPARK-17423?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16133095#comment-16133095
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Gaurav Shah commented on SPARK-17423:
-------------------------------------
is there a way to do second non-null value ?
changing the window to
{code:sql}
ROWS BETWEEN UNBOUNDED PRECEDING AND 2 PRECEDING
{code}
would not help
> Support IGNORE NULLS option in Window functions
> -----------------------------------------------
>
> Key: SPARK-17423
> URL: https://issues.apache.org/jira/browse/SPARK-17423
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.0.0
> Reporter: Tim Chan
> Priority: Minor
>
> http://stackoverflow.com/questions/24338119/is-it-possible-to-ignore-null-values-when-using-lag-and-lead-functions-in-sq
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