TransactionSelector

• JSON representation

This message is used to select the transaction in which a sessions.read or sessions.executeSql call runs.

See TransactionOptions for more information about transactions.

JSON representation
{ // Union field selector can be only one of the following: "singleUse": { object (TransactionOptions) }, "id": string, "begin": { object (TransactionOptions) } // End of list of possible types for union field selector. }

Fields
Union field selector. If no fields are set, the default is a single use transaction with strong concurrency. selector can be only one of the following:
singleUse	object (TransactionOptions) Execute the read or SQL query in a temporary transaction. This is the most efficient way to execute a transaction that consists of a single SQL query.
id	string (bytes format) Execute the read or SQL query in a previously-started transaction. A base64-encoded string.
begin	object (TransactionOptions) Begin a new transaction and execute this read or SQL query in it. The transaction ID of the new transaction is returned in ResultSetMetadata.transaction, which is a Transaction.