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Posted to issues@flink.apache.org by "Shaoxuan Wang (JIRA)" <ji...@apache.org> on 2017/04/20 01:58:09 UTC
[jira] [Updated] (FLINK-6334) Refactoring UDTF interface
[ https://issues.apache.org/jira/browse/FLINK-6334?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Shaoxuan Wang updated FLINK-6334:
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Description: The current UDTF leverages the table.join(expression) interface, which is not a proper interface in terms of semantics. We would like to refactor this to let UDTF use table.join(table) interface. Very briefly, UDTF's apply method will return a Table Type, so Join(UDTF('a, 'b, ...) as 'c) shall be viewed as join(Table) (was: UDTF's apply method returns a Table Type, so Join(UDTF('a, 'b, ...) as 'c) shall be viewed as join(Table))
> Refactoring UDTF interface
> --------------------------
>
> Key: FLINK-6334
> URL: https://issues.apache.org/jira/browse/FLINK-6334
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Reporter: Ruidong Li
>
> The current UDTF leverages the table.join(expression) interface, which is not a proper interface in terms of semantics. We would like to refactor this to let UDTF use table.join(table) interface. Very briefly, UDTF's apply method will return a Table Type, so Join(UDTF('a, 'b, ...) as 'c) shall be viewed as join(Table)
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