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 | |
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{ // Union field |
Fields | ||
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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: |
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singleUse |
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. |
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id |
Execute the read or SQL query in a previously-started transaction. A base64-encoded string. |
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begin |
Begin a new transaction and execute this read or SQL query in it. The transaction ID of the new transaction is returned in |