[jira] [Commented] (FLINK-10163) Support CREATE VIEW in SQL Client

[ASF GitHub Bot (JIRA)]

    [ 
https://issues.apache.org/jira/browse/FLINK-10163?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16589718#comment-16589718
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ASF GitHub Bot commented on FLINK-10163:
----------------------------------------

twalthr opened a new pull request #6606: [FLINK-10163] [sql-client] Support 
views in SQL Client
URL: https://github.com/apache/flink/pull/6606
 
 
   ## What is the purpose of the change
   
   Adds initial support for views in SQL Client. It adds the following 
statements:
   - `CREATE VIEW`: Creates a virtual table from a SQL query. Syntax: 'CREATE 
VIEW <name> AS <query>'
   - `SHOW VIEW`: Describes a previously created virtual table. Syntax: 'SHOW 
VIEW <name>'
   - `DROP VIEW`: Deletes a previously created virtual table. Syntax: 'DROP 
VIEW <name>'
   
   It also adds the section `views` to environment files.
   
   
   ## Brief change log
   
   - Rewritten statement parser for statements with more than 1 operand
   - View support added throughout the SQL Client
   - Initial validation of environment files during startup
   - Code clean up
   
   
   ## Verifying this change
   
   - `SqlCommandParserTest`
   - `ExecutionContextTest`
   - `LocalExecutorITCase`
   
   ## Does this pull request potentially affect one of the following parts:
   
     - Dependencies (does it add or upgrade a dependency): no
     - The public API, i.e., is any changed class annotated with 
`@Public(Evolving)`: no
     - The serializers: no
     - The runtime per-record code paths (performance sensitive): no
     - Anything that affects deployment or recovery: JobManager (and its 
components), Checkpointing, Yarn/Mesos, ZooKeeper: no
     - The S3 file system connector: no
   
   ## Documentation
   
     - Does this pull request introduce a new feature? yes
     - If yes, how is the feature documented? docs
   

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> Support CREATE VIEW in SQL Client
> ---------------------------------
>
>                 Key: FLINK-10163
>                 URL: https://issues.apache.org/jira/browse/FLINK-10163
>             Project: Flink
>          Issue Type: New Feature
>          Components: Table API &amp; SQL
>            Reporter: Timo Walther
>            Assignee: Timo Walther
>            Priority: Major
>              Labels: pull-request-available
>
> The possibility to define a name for a subquery would improve the usability 
> of the SQL Client. The SQL standard defines \{{CREATE VIEW}} for defining a 
> virtual table.
>  
> Example:
> {code}
>  CREATE VIEW viewName
>  [ '(' columnName [, columnName ]* ')' ]
>  AS Query
> {code}



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