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https://issues.apache.org/jira/browse/SPARK-29632?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16985694#comment-16985694
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Xiao Li commented on SPARK-29632:
---------------------------------
It is risky to support this. For the managed tables, the data will be dropped
when the corresponding database is dropped [the whole directory is deleted].
Thus, if we really need this, this is only allowed for the existing EXTERNAL
tables.
> Support ALTER TABLE [relname] SET SCHEMA [dbname]
> -------------------------------------------------
>
> Key: SPARK-29632
> URL: https://issues.apache.org/jira/browse/SPARK-29632
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Takeshi Yamamuro
> Priority: Major
>
> {code}
> CREATE SCHEMA temp_view_test;
> CREATE TABLE tx1 (x1 int, x2 int, x3 string) using parquet;
> ALTER TABLE tx1 SET SCHEMA temp_view_test;
> {code}
> {code}
> ALTER TABLE [ IF EXISTS ] name
> SET SCHEMA new_schema
> {code}
> https://www.postgresql.org/docs/current/sql-altertable.html
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