spark-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Xiao Li (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SPARK-20586) Add deterministic to ScalaUDF
Date Wed, 26 Jul 2017 00:21:00 GMT

     [ https://issues.apache.org/jira/browse/SPARK-20586?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Xiao Li updated SPARK-20586:
----------------------------
    Summary: Add deterministic to ScalaUDF  (was: Add deterministic and distinctLike to ScalaUDF)

> Add deterministic to ScalaUDF
> -----------------------------
>
>                 Key: SPARK-20586
>                 URL: https://issues.apache.org/jira/browse/SPARK-20586
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.2.0
>            Reporter: Xiao Li
>            Assignee: Xiao Li
>
> https://hive.apache.org/javadocs/r2.0.1/api/org/apache/hadoop/hive/ql/udf/UDFType.html
> Like Hive UDFType, we should allow users to add the extra flags for ScalaUDF too. {{stateful}}/{{impliesOrder}}
are not applicable to ScalaUDF. Thus, we only add the following two flags. 
> - deterministic: Certain optimizations should not be applied if UDF is not deterministic.
Deterministic UDF returns same result each time it is invoked with a particular input. This
determinism just needs to hold within the context of a query.



--
This message was sent by Atlassian JIRA
(v6.4.14#64029)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@spark.apache.org
For additional commands, e-mail: issues-help@spark.apache.org


Mime
View raw message