UpdateDatabaseDdlRequest(mapping=None, *, ignore_unknown_fields=False, **kwargs)
Enqueues the given DDL statements to be applied, in order but not
necessarily all at once, to the database schema at some point (or
points) in the future. The server checks that the statements are
executable (syntactically valid, name tables that exist, etc.)
before enqueueing them, but they may still fail upon later execution
(e.g., if a statement from another batch of statements is applied
first and it conflicts in some way, or if there is some data-related
problem like a
NULL value in a column to which
would be added). If a statement fails, all subsequent statements in
the batch are automatically cancelled.
Each batch of statements is assigned a name which can be used with
Operations][google.longrunning.Operations] API to monitor
progress. See the
field for more details.
Required. The database to update.
Required. DDL statements to be applied to the database.
If empty, the new update request is assigned an automatically-generated operation ID. Otherwise, ``operation_id`` is used to construct the name of the resulting `Operation][google.longrunning.Operation]`. Specifying an explicit operation ID simplifies determining whether the statements were executed in the event that the `UpdateDatabaseDdl][google.spanner.admin.database.v1.DatabaseAdmin.UpdateDatabaseDdl]` call is replayed, or the return value is otherwise lost: the `database][google.spanner.admin.database.v1.UpdateDatabaseDdlRequest.database]` and ``operation_id`` fields can be combined to form the `name][google.longrunning.Operation.name]` of the resulting `longrunning.Operation][google.longrunning.Operation]`: ``