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https://issues.apache.org/jira/browse/FLINK-6574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16011528#comment-16011528
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ASF GitHub Bot commented on FLINK-6574:
---------------------------------------
GitHub user haohui opened a pull request:
https://github.com/apache/flink/pull/3913
[FLINK-6574] Support nested catalogs in ExternalCatalog.
This PR extends the APIs of the `ExternalCatalog` to support arbitrary
nesting within external catalogs.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/haohui/flink FLINK-6574
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/3913.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #3913
----
commit 226aae03a605b3149c48de1154de7efb287334f5
Author: Haohui Mai <[email protected]>
Date: 2017-05-16T00:09:18Z
[FLINK-6574] Support nested catalogs in ExternalCatalog.
----
> Support nested catalogs in ExternalCatalog
> ------------------------------------------
>
> Key: FLINK-6574
> URL: https://issues.apache.org/jira/browse/FLINK-6574
> Project: Flink
> Issue Type: Bug
> Components: Table API & SQL
> Reporter: Haohui Mai
> Assignee: Haohui Mai
> Priority: Critical
> Fix For: 1.3.0
>
>
> We found out that the current external catalog requires three layers of
> references for any tables. For example, the SQL would look like the following
> when referencing external table:
> {noformat}
> SELECT * FROM catalog.db.table
> {noformat}
> It would be great to support only two layers of indirections which is closer
> to many of the deployment on Presto / Hive today.
> {noformat}
> SELECT * FROM db.table
> {noformat}
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