You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@flink.apache.org by "Jark Wu (JIRA)" <ji...@apache.org> on 2016/06/16 06:19:05 UTC
[jira] [Assigned] (FLINK-4068) Move constant computations out of
code-generated `flatMap` functions.
[ https://issues.apache.org/jira/browse/FLINK-4068?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jark Wu reassigned FLINK-4068:
------------------------------
Assignee: Jark Wu
> Move constant computations out of code-generated `flatMap` functions.
> ---------------------------------------------------------------------
>
> Key: FLINK-4068
> URL: https://issues.apache.org/jira/browse/FLINK-4068
> Project: Flink
> Issue Type: Improvement
> Components: Table API
> Affects Versions: 1.1.0
> Reporter: Fabian Hueske
> Assignee: Jark Wu
>
> The generated functions for expressions of the Table API or SQL include constant computations.
> For instance the code generated for a predicate like:
> {code}
> myInt < (10 + 20)
> {code}
> looks roughly like:
> {code}
> public void flatMap(Row in, Collector<Row> out) {
> Integer in1 = in.productElement(1);
> int temp = 10 + 20;
> if (in1 < temp) {
> out.collect(in)
> }
> }
> {code}
> In this example the computation of {{temp}} is constant and could be moved out of the {{flatMap()}} method.
> The same might apply for generated function other than {{FlatMap}} as well.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)