[jira] [Updated] (SPARK-23168) Hints for fact tables and unique columns

["Hyukjin Kwon (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-23168?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hyukjin Kwon updated SPARK-23168:
---------------------------------
    Labels: bulk-closed  (was: )

> Hints for fact tables and unique columns
> ----------------------------------------
>
>                 Key: SPARK-23168
>                 URL: https://issues.apache.org/jira/browse/SPARK-23168
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>    Affects Versions: 2.2.1
>            Reporter: Takeshi Yamamuro
>            Priority: Minor
>              Labels: bulk-closed
>
> We already have fact table and unique column inferences in StarSchemaDetection for decision making queries. IMHO, in most cases, users could know which is a fact table and which columns are unique. So, fact table and unique column hint might help for these users.
>  For example,
> {code:java}
> scala> factTable.hint("factTable").hint("uid").join(dimTable)
> {code}



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