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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-7337) Refactor handling of time indicator attributes
Date Mon, 07 Aug 2017 18:47:03 GMT

    [ https://issues.apache.org/jira/browse/FLINK-7337?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16117048#comment-16117048
] 

ASF GitHub Bot commented on FLINK-7337:
---------------------------------------

Github user twalthr commented on a diff in the pull request:

    https://github.com/apache/flink/pull/4488#discussion_r131714343
  
    --- Diff: flink-libraries/flink-table/src/main/scala/org/apache/flink/table/codegen/calls/ScalarOperators.scala
---
    @@ -937,15 +935,40 @@ object ScalarOperators {
         }
       }
     
    -  def generateConcat(
    -      method: Method,
    -      operands: Seq[GeneratedExpression]): GeneratedExpression = {
    +  def generateConcat(operands: Seq[GeneratedExpression]): GeneratedExpression = {
     
    -    generateCallIfArgsNotNull(false, STRING_TYPE_INFO, operands) {
    -      (terms) =>s"${qualifyMethod(method)}(${terms.mkString(", ")})"
    +    generateCallIfArgsNotNull(true, STRING_TYPE_INFO, operands) {
    --- End diff --
    
    the nullability should depend on the code generators nullability


> Refactor handling of time indicator attributes
> ----------------------------------------------
>
>                 Key: FLINK-7337
>                 URL: https://issues.apache.org/jira/browse/FLINK-7337
>             Project: Flink
>          Issue Type: Improvement
>          Components: Table API & SQL
>    Affects Versions: 1.4.0
>            Reporter: Fabian Hueske
>            Assignee: Fabian Hueske
>
> After a [discussion on the dev mailing list|https://lists.apache.org/thread.html/735d55f9022df8ff73566a9f1553e14be94f8443986ad46559b35869@%3Cdev.flink.apache.org%3E]
I propose the following changes to the current handling of time indicator attributes:
> * Remove the separation of logical and physical row type.
> ** Hold the event-time timestamp as regular Long field in Row
> ** Represent the processing-time indicator type as a null-valued field in Row (1 bit
overhead)
> * Remove materialization of event-time timestamps because timestamp is already accessible
in Row.
> * Add {{ProcessFunction}} to set timestamp into the timestamp field of a {{StreamRecord}}.



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