TransactionOptions

Options for creating a new transaction.

JSON representation
{ // Union field mode can be only one of the following: "readOnly": { object(ReadOnly) }, "readWrite": { object(ReadWrite) } // End of list of possible types for union field mode. }

Fields
Union field mode. The mode of the transaction. mode can be only one of the following:
readOnly	object(ReadOnly) The transaction can only be used for read operations.
readWrite	object(ReadWrite) The transaction can be used for both read and write operations.

ReadOnly

Options for a transaction that can only be used to read documents.

JSON representation
{ "readTime": string }

Fields
readTime	string (Timestamp format) Reads documents at the given time. This may not be older than 60 seconds. A timestamp in RFC3339 UTC "Zulu" format, accurate to nanoseconds. Example: "2014-10-02T15:01:23.045123456Z".

ReadWrite

Options for a transaction that can be used to read and write documents.

JSON representation
{ "retryTransaction": string }

Fields
retryTransaction	string (bytes format) An optional transaction to retry. A base64-encoded string.