[jira] [Commented] (FLINK-17111) Support SHOW VIEWS in Flink SQL

["Konstantin Knauf (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-17111?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17248547#comment-17248547 ] 

Konstantin Knauf commented on FLINK-17111:
------------------------------------------

[~ykt836] Is there a regression in Flink 1.12? In the SQL CLI,  I see tables and views when running {{SHOW TABLES}} and for {{SHOW VIEWS}} I get 

{quote}
[ERROR] Could not execute SQL statement. Reason:
org.apache.flink.table.client.gateway.SqlExecutionException: Unknown operation: SHOW VIEWS
{quote}


> Support SHOW VIEWS in Flink SQL 
> --------------------------------
>
>                 Key: FLINK-17111
>                 URL: https://issues.apache.org/jira/browse/FLINK-17111
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Table SQL / API, Table SQL / Planner
>    Affects Versions: 1.10.0
>            Reporter: Zhenghua Gao
>            Assignee: Zhenghua Gao
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.11.0
>
>
> SHOW TABLES and SHOW VIEWS are not SQL standard-compliant commands. 
> MySQL supports SHOW TABLES which lists the non-TEMPORARY tables(and views) in a given database, and doesn't support SHOW VIEWS.
> Oracle/SQL Server/PostgreSQL don't support SHOW TABLES and SHOW VIEWS. A workaround is to query a system table which stores metadata of tables and views.
> Hive supports both SHOW TABLES and SHOW VIEWS. 
> We follows the Hive style which lists all tables and views with SHOW TABLES and lists only views with SHOW VIEWS. 



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