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Class BeginTransactionRequest (3.66.0)

BeginTransactionRequest(mapping=None, *, ignore_unknown_fields=False, **kwargs)

The request for BeginTransaction][google.spanner.v1.Spanner.BeginTransaction].

Attributes
Name	Description
`session`	`str` Required. The session in which the transaction runs.
`options`	`google.cloud.spanner_v1.types.TransactionOptions` Required. Options for the new transaction.
`request_options`	`google.cloud.spanner_v1.types.RequestOptions` Common options for this request. Priority is ignored for this request. Setting the priority in this `request_options` struct doesn't do anything. To set the priority for a transaction, set it on the reads and writes that are part of this transaction instead.
`mutation_key`	`google.cloud.spanner_v1.types.Mutation` Optional. Required for read-write transactions on a multiplexed session that commit mutations but don't perform any reads or queries. You must randomly select one of the mutations from the mutation set and send it as a part of this request.
`routing_hint`	`google.cloud.spanner_v1.types.RoutingHint` Optional. Makes the Spanner requests location-aware if present. It gives the server hints that can be used to route the request to an appropriate server, potentially significantly decreasing latency and improving throughput. To achieve improved performance, most fields must be filled in with accurate values.

Attributes