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https://issues.apache.org/jira/browse/FLINK-5570?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15939365#comment-15939365
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Fabian Hueske commented on FLINK-5570:
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Thanks for the feedback [~wheat9].
I think we are fine at the moment, but could update the {{isRegistered()}} and
{{getRowType()}} methods to also take an {{Array[String]}} parameter.
At the moment, they {{isRegistered()}} is only called from methods that manage
the top-level tables (not those in the catalog). {{getRowType()}} was only
called from {{scan()}} and is now unused so it could be removed.
> Support register external catalog to table environment
> ------------------------------------------------------
>
> Key: FLINK-5570
> URL: https://issues.apache.org/jira/browse/FLINK-5570
> Project: Flink
> Issue Type: Sub-task
> Components: Table API & SQL
> Reporter: Kurt Young
> Assignee: jingzhang
>
> This issue aims to support register one or more {{ExternalCatalog}} (which is
> referred in https://issues.apache.org/jira/browse/FLINK-5568) to
> {{TableEnvironment}}. After registration, SQL and TableAPI queries could
> access to tables in the external catalogs without register those tables one
> by one to {{TableEnvironment}} beforehand.
> We plan to add two APIs in {{TableEnvironment}}:
> 1. register externalCatalog
> {code}
> def registerExternalCatalog(name: String, externalCatalog: ExternalCatalog):
> Unit
> {code}
> 2. scan a table from registered catalog and returns the resulting {{Table}},
> the API is very useful in TableAPI queries.
> {code}
> def scan(catalogName: String, tableIdentifier: TableIdentifier): Table
> {code}
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