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https://issues.apache.org/jira/browse/SPARK-12013?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15029140#comment-15029140
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Xiao Li commented on SPARK-12013:
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I am not sure whether we should add such an interface. Let [~rxin] [~marmbrus]
give a suggestion.
IMO, the simplest way is to run the following code. It will return a sequence.
If needed, you can convert it to an array, by calling toArray
hiveContext.runSqlHive("SHOW DATABASES")
> Add a Hive context method to retrieve the database Names
> --------------------------------------------------------
>
> Key: SPARK-12013
> URL: https://issues.apache.org/jira/browse/SPARK-12013
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 1.5.2
> Reporter: Jose Antonio
> Priority: Minor
> Labels: features, sql
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> As the HiveContext method tableNames() add a new method to retrieve the
> database names.
> Currently one hace to make a show databases and get a dataframe.colllect()
> This is very slow since it can be queried quickly just by asking the Hive
> metastore.
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