Pre-General Availability Draft: 2017-11-22
DROP VIEW [IF EXISTS] view_name [, view_name] ... [RESTRICT | CASCADE]
If any views named in the argument list do not exist, the statement fails with an error indicating by name which nonexisting views it was unable to drop, and no changes are made.
In MySQL 5.7 and earlier,
DROP VIEW returns an error if any
views named in the argument list do not exist, but also drops
all views in the list that do exist. Due to the change in
behavior in MySQL 8.0, a partially completed
DROP VIEW operation on a MySQL
5.7 master fails when replicated on a MySQL
8.0 slave. To avoid this failure scenario, use
IF EXISTS syntax in
VIEW statements to prevent an error from occurring for
views that do not exist. For more information, see
Section 13.1.1, “Atomic Data Definition Statement Support”.
IF EXISTS clause prevents an error from
occurring for views that don't exist. When this clause is given, a
NOTE is generated for each nonexistent view.
See Section 126.96.36.199, “SHOW WARNINGS Syntax”.
given, are parsed and ignored.