Read-only transactions provide guaranteed consistency across several reads,
but do not allow writes. Read-only transactions can be configured to read at
timestamps in the past. Read-only transactions do not need to be committed and
do not take locks.
ReadWrite
Locking read-write transactions are the only transaction type that support writing
data into Cloud Spanner. These transactions rely on pessimistic locking and, if
necessary, two-phase commit. Locking read-write transactions may abort, requiring
the application to retry.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07 UTC."],[[["\u003cp\u003eThe latest version of the \u003ccode\u003eGoogle.Cloud.Spanner.Data.TransactionMode\u003c/code\u003e is \u003ccode\u003e5.0.0-beta05\u003c/code\u003e, with previous versions ranging down to \u003ccode\u003e3.5.0\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eTransactionMode\u003c/code\u003e is an enum within the \u003ccode\u003eGoogle.Cloud.Spanner.Data\u003c/code\u003e namespace used to specify the type of transaction.\u003c/p\u003e\n"],["\u003cp\u003eThe enum has two fields: \u003ccode\u003eReadOnly\u003c/code\u003e, which allows consistent reads but no writes, and \u003ccode\u003eReadWrite\u003c/code\u003e, which permits writing data using pessimistic locking and two-phase commit.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eReadWrite\u003c/code\u003e transaction may abort, requiring the application to retry.\u003c/p\u003e\n"]]],[],null,["# Google.Cloud.Spanner.Data - Enum TransactionMode (5.1.0)\n\nVersion latestkeyboard_arrow_down\n\n- [5.1.0 (latest)](/dotnet/docs/reference/Google.Cloud.Spanner.Data/latest/Google.Cloud.Spanner.Data.TransactionMode)\n- [5.0.0](/dotnet/docs/reference/Google.Cloud.Spanner.Data/5.0.0/Google.Cloud.Spanner.Data.TransactionMode)\n- [4.6.0](/dotnet/docs/reference/Google.Cloud.Spanner.Data/4.6.0/Google.Cloud.Spanner.Data.TransactionMode)\n- [4.5.0](/dotnet/docs/reference/Google.Cloud.Spanner.Data/4.5.0/Google.Cloud.Spanner.Data.TransactionMode)\n- [4.4.0](/dotnet/docs/reference/Google.Cloud.Spanner.Data/4.4.0/Google.Cloud.Spanner.Data.TransactionMode)\n- [4.3.0](/dotnet/docs/reference/Google.Cloud.Spanner.Data/4.3.0/Google.Cloud.Spanner.Data.TransactionMode)\n- [4.2.0](/dotnet/docs/reference/Google.Cloud.Spanner.Data/4.2.0/Google.Cloud.Spanner.Data.TransactionMode)\n- [4.1.0](/dotnet/docs/reference/Google.Cloud.Spanner.Data/4.1.0/Google.Cloud.Spanner.Data.TransactionMode)\n- [4.0.0](/dotnet/docs/reference/Google.Cloud.Spanner.Data/4.0.0/Google.Cloud.Spanner.Data.TransactionMode)\n- [3.15.1](/dotnet/docs/reference/Google.Cloud.Spanner.Data/3.15.1/Google.Cloud.Spanner.Data.TransactionMode)\n- [3.14.0](/dotnet/docs/reference/Google.Cloud.Spanner.Data/3.14.0/Google.Cloud.Spanner.Data.TransactionMode)\n- [3.13.0](/dotnet/docs/reference/Google.Cloud.Spanner.Data/3.13.0/Google.Cloud.Spanner.Data.TransactionMode)\n- [3.12.0](/dotnet/docs/reference/Google.Cloud.Spanner.Data/3.12.0/Google.Cloud.Spanner.Data.TransactionMode)\n- [3.11.0](/dotnet/docs/reference/Google.Cloud.Spanner.Data/3.11.0/Google.Cloud.Spanner.Data.TransactionMode)\n- [3.10.0](/dotnet/docs/reference/Google.Cloud.Spanner.Data/3.10.0/Google.Cloud.Spanner.Data.TransactionMode)\n- [3.9.0](/dotnet/docs/reference/Google.Cloud.Spanner.Data/3.9.0/Google.Cloud.Spanner.Data.TransactionMode)\n- [3.8.0](/dotnet/docs/reference/Google.Cloud.Spanner.Data/3.8.0/Google.Cloud.Spanner.Data.TransactionMode)\n- [3.7.0](/dotnet/docs/reference/Google.Cloud.Spanner.Data/3.7.0/Google.Cloud.Spanner.Data.TransactionMode)\n- [3.6.0](/dotnet/docs/reference/Google.Cloud.Spanner.Data/3.6.0/Google.Cloud.Spanner.Data.TransactionMode)\n- [3.5.0](/dotnet/docs/reference/Google.Cloud.Spanner.Data/3.5.0/Google.Cloud.Spanner.Data.TransactionMode) \n\n public enum TransactionMode\n\nReference documentation and code samples for the Google.Cloud.Spanner.Data enum TransactionMode.\n\nIndicates the mode for the transaction.\n\nNamespace\n---------\n\n[Google.Cloud.Spanner.Data](/dotnet/docs/reference/Google.Cloud.Spanner.Data/latest/Google.Cloud.Spanner.Data)\n\nAssembly\n--------\n\nGoogle.Cloud.Spanner.Data.dll"]]
