Module database (3.16.0)

User friendly container for Cloud Spanner Database.

Classes

BatchCheckout

BatchCheckout(database, request_options=None)

Context manager for using a batch from a database.

Inside the context manager, checks out a session from the database, creates a batch from it, making the batch available.

Caller must not use the batch to perform API requests outside the scope of the context manager.

Parameters
Name	Description
`database`	`Database` database to use
`request_options`	`RequestOptions` (Optional) Common options for the commit request. If a dict is provided, it must be of the same form as the protobuf message RequestOptions.

BatchSnapshot

BatchSnapshot(database, read_timestamp=None, exact_staleness=None)

Wrapper for generating and processing read / query batches.

Parameters
Name	Description
`database`	`Database` database to use
`read_timestamp`	`datetime.datetime` Execute all reads at the given timestamp.
`exact_staleness`	`datetime.timedelta` Execute all reads at a timestamp that is `exact_staleness` old.

Database

Database(database_id, instance, ddl_statements=(), pool=None, logger=None, encryption_config=None, database_dialect=<DatabaseDialect.DATABASE_DIALECT_UNSPECIFIED: 0>)

Representation of a Cloud Spanner Database.

We can use a Database to:

create the database
reload the database
update the database
drop the database

Parameters
Name	Description
`database_id`	`str` The ID of the database.
`instance`	`Instance` The instance that owns the database.
`ddl_statements`	`list of string` (Optional) DDL statements, excluding the CREATE DATABASE statement.
`pool`	`concrete subclass of AbstractSessionPool.` (Optional) session pool to be used by database. If not passed, the database will construct an instance of BurstyPool.
`logger`	`logging.Logger` (Optional) a custom logger that is used if `log_commit_stats` is `True` to log commit statistics. If not passed, a logger will be created when needed that will log the commit statistics to stdout.
`encryption_config`	`EncryptionConfig or RestoreDatabaseEncryptionConfig or dict` (Optional) Encryption configuration for the database. If a dict is provided, it must be of the same form as either of the protobuf messages EncryptionConfig or RestoreDatabaseEncryptionConfig
`database_dialect`	`DatabaseDialect` (Optional) database dialect for the database

SnapshotCheckout

SnapshotCheckout(database, **kw)

Context manager for using a snapshot from a database.

Inside the context manager, checks out a session from the database, creates a snapshot from it, making the snapshot available.

Caller must not use the snapshot to perform API requests outside the scope of the context manager.

Parameters
Name	Description
`kw`	`dict` Passed through to Snapshot constructor.
`database`	`Database` database to use