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https://issues.apache.org/jira/browse/SPARK-19884?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15903257#comment-15903257
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Herman van Hovell commented on SPARK-19884:
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You can use the catalog for that by calling
{{spark.catalog.listFunctions().show()}}, or you can use sql and issue the
{{show functions}} command.
> Add the ability to get all registered functions from a SparkSession
> -------------------------------------------------------------------
>
> Key: SPARK-19884
> URL: https://issues.apache.org/jira/browse/SPARK-19884
> Project: Spark
> Issue Type: New Feature
> Components: SQL
> Affects Versions: 2.1.0
> Reporter: Yael Aharon
>
> It would be very useful to get the list of functions that are registered with
> a SparkSession. Built-in and otherwise.
> This would be useful e.g. for auto-completion support in editors built around
> Spark SQL.
> thanks!
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