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From "Zhenghua Gao (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (FLINK-8045) Add Internal DATE/TIME/TIMESTAMP as internal representation of DATE/TIME/TIMESTAMP
Date Fri, 10 Nov 2017 17:27:00 GMT

     [ https://issues.apache.org/jira/browse/FLINK-8045?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Zhenghua Gao updated FLINK-8045:
--------------------------------
    Description: 
Currently DATE/TIME/TIMESTAMP have internal representation. Such as Date is represented as
Int internal. 
This feature may improve performance processing DATE/TIME/TIMESTAMP data. 
But I found there is a LIMITATION: internal representation exists only within one operator.

We transfer DATE/TIME/TIMESTAMP objects between operators.

I think we could treat DATE/TIME/TIMESTAMP as internal representation in the whole job, and
cast them to java.sql.* as needed(UDF/UDTF/OUTPUT)


  was:
    Currently DATE/TIME/TIMESTAMP have internal representation. Such as Date is represented
as Int internal. This feature may improve performance processing DATE/TIME/TIMESTAMP data.
But I found there is a LIMITATION: internal representation exists only within one operator.

We transfer DATE/TIME/TIMESTAMP objects between operators.
     I think we could treat DATE/TIME/TIMESTAMP as internal representation in the whole job,
and cast them to java.sql.* as needed(UDF/UDTF/OUTPUT)



> Add Internal DATE/TIME/TIMESTAMP as internal representation of DATE/TIME/TIMESTAMP
> ----------------------------------------------------------------------------------
>
>                 Key: FLINK-8045
>                 URL: https://issues.apache.org/jira/browse/FLINK-8045
>             Project: Flink
>          Issue Type: Improvement
>          Components: Table API & SQL
>            Reporter: Zhenghua Gao
>            Assignee: Zhenghua Gao
>
> Currently DATE/TIME/TIMESTAMP have internal representation. Such as Date is represented
as Int internal. 
> This feature may improve performance processing DATE/TIME/TIMESTAMP data. 
> But I found there is a LIMITATION: internal representation exists only within one operator.

> We transfer DATE/TIME/TIMESTAMP objects between operators.
> I think we could treat DATE/TIME/TIMESTAMP as internal representation in the whole job,
and cast them to java.sql.* as needed(UDF/UDTF/OUTPUT)



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