Github user gatorsmile commented on the issue:
https://github.com/apache/spark/pull/12872
Currently, the existing DDL behaviors for temporary views when users do not
specify the database name:
- `CREATE OR REPLACE TEMPORARY VIEW view_name` alters the TEMPORARY view if
the temporary view already exists.
- `DROP VIEW view_name` OR `SELECT... FROM view_name` will be always first
applied to a TEMPORARY view, if existing. If the temporary view does not exist,
we will try to drop/fetch the PERSISTENT view, if existing.
- `ALTER VIEW view_name` is only applicable to the PERSISTENT view, even if
the temporary view with the same name exists.
@clockfly @rxin @yhuai @liancheng @hvanhovell @cloud-fan Should we make
them consistent?
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