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

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`. }

{

  // 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`.