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

["Takeshi Yamamuro (JIRA)" <ji...@apache.org>]

Takeshi Yamamuro created SPARK-23168:
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             Summary: Hints for fact tables and unique columns
                 Key: SPARK-23168
                 URL: https://issues.apache.org/jira/browse/SPARK-23168
             Project: Spark
          Issue Type: New Feature
          Components: SQL
    Affects Versions: 2.2.1
         Environment: 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}
scala> factTable.hint("factTable").hint("uid").join(dimTable)
{code}

            Reporter: Takeshi Yamamuro






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