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ASF GitHub Bot commented on FLINK-9737: --------------------------------------- pnowojski commented on a change in pull request #6897: [FLINK-9737] [FLINK-8880] [sql-client] Support defining temporal tables in environment files URL: https://github.com/apache/flink/pull/6897#discussion_r227268384 ########## File path: docs/dev/table/sqlClient.md ########## @@ -503,7 +504,49 @@ Views created within a CLI session can also be removed again using the `DROP VIE DROP VIEW MyNewView; {% endhighlight %} -<span class="label label-danger">Attention</span> The definition of views is limited to the mentioned syntax above. Defining a schema for views or escape whitespaces in table names will be supported in future versions. +<span class="label label-danger">Attention</span> The definition of views in the CLI is limited to the mentioned syntax above. Defining a schema for views or escaping whitespaces in table names will be supported in future versions. + +{% top %} + +Temporal Tables +--------------- + +A [temporal table](./streaming/temporal_tables.html) allows for a (parameterized) view on a changing history table that returns the content of a table at a specific point in time. This is especially useful for joining a table with the content of another table at a particular timestamp. More information can be found in the [temporal table joins](./streaming/joins.html#join-with-a-temporal-table) page. + +The following example shows how to define a temporal table `SourceTemporalTable`: + +{% highlight yaml %} +tables: + + # Define the table source (or view) that contains updates to a temporal table + - name: HistorySource + type: source-table + update-mode: append + connector: # ... + format: # ... + schema: + - name: integerField + type: INT + - name: stringField + type: VARCHAR + - name: rowtimeField + type: TIMESTAMP + rowtime: + timestamps: + type: from-field + from: rowtimeField + watermarks: + type: from-source + + # Define a temporal table over the changing history table with time attribute and primary key + - name: SourceTemporalTable + type: temporal-table + changing-table: HistorySource + primary-key: integerField + time-attribute: rowtimeField Review comment: change to: ``` time-attribute: rowtimeField # could also be a proctime field ``` ? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org > Allow to define Table Version Functions from SQL environment file > ----------------------------------------------------------------- > > Key: FLINK-9737 > URL: https://issues.apache.org/jira/browse/FLINK-9737 > Project: Flink > Issue Type: Sub-task > Components: Table API & SQL > Affects Versions: 1.5.0 > Reporter: Piotr Nowojski > Assignee: Timo Walther > Priority: Major > Labels: pull-request-available > > It should be possible to define TVF from SQL environment file. -- This message was sent by Atlassian JIRA (v7.6.3#76005)