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https://issues.apache.org/jira/browse/SPARK-2560?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14130929#comment-14130929
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Michael Armbrust commented on SPARK-2560:
-----------------------------------------
Honestly for now I'd point people at the Hive one with a list of the things
that are not supported. With Spark SQL being less than a year old, the
language (and the direction the language is going in) are kind of in flux. Any
documentation about the SqlParser is likely going to be out of date shortly.
HiveQL is by far the best supported mechanism and will be supported long term.
> Create Spark SQL syntax reference
> ---------------------------------
>
> Key: SPARK-2560
> URL: https://issues.apache.org/jira/browse/SPARK-2560
> Project: Spark
> Issue Type: Documentation
> Components: SQL
> Reporter: Nicholas Chammas
> Assignee: Michael Armbrust
> Priority: Critical
> Fix For: 1.1.0
>
>
> Does Spark SQL support {{LEN()}}? How about {{LIMIT}}? And what about {{MY
> FAVOURITE SYNTAX}}?
> Right now there is no reference page to document this. [Hive has one.|
> https://cwiki.apache.org/confluence/display/Hive/LanguageManual+Select] Spark
> SQL should have one, too.
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