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https://issues.apache.org/jira/browse/SPARK-29219?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Burak Yavuz resolved SPARK-29219.
---------------------------------
Fix Version/s: 3.0.0
Resolution: Done
Resolved by [https://github.com/apache/spark/pull/26913]
> DataSourceV2: Support all SaveModes in DataFrameWriter.save
> -----------------------------------------------------------
>
> Key: SPARK-29219
> URL: https://issues.apache.org/jira/browse/SPARK-29219
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Burak Yavuz
> Assignee: Burak Yavuz
> Priority: Major
> Fix For: 3.0.0
>
>
> We currently don't support all save modes in DataFrameWriter.save as the
> TableProvider interface allows for the reading/writing of data, but not for
> the creation of tables. We created a catalog API to support the
> creation/dropping/checking existence of tables, but DataFrameWriter.save
> doesn't necessarily use a catalog for example, when writing to a path based
> table.
> For this case, we propose a new interface that will allow TableProviders to
> extract an Indentifier and a Catalog from a bundle of
> CaseInsensitiveStringOptions. This information can then be used to check the
> existence of a table, and support all save modes. If a Catalog is not
> defined, then the behavior is to use the spark_catalog (or configured session
> catalog) to perform the check.
>
> The interface can look like:
> {code:java}
> trait CatalogOptions {
> def extractCatalog(StringMap): String
> def extractIdentifier(StringMap): Identifier
> } {code}
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