Locks for reads within the transaction are not acquired on read.
Instead the locks are acquired on a commit to validate that
read/queried data has not changed since the transaction started.
Pessimistic
Pessimistic lock mode.
Read locks are acquired immediately on read.
Unspecified
Default value.
If the value is not specified, the pessimistic read lock is used.
[[["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 2025-03-21 UTC."],[[["This page provides reference documentation for the `ReadLockMode` enum within the Google Cloud Spanner v1 API, specifically for the .NET library."],["The `ReadLockMode` enum is used to configure the lock mode for read-write transactions, offering options for `Optimistic`, `Pessimistic`, and `Unspecified` lock modes."],["The documentation lists various versions of the Google Cloud Spanner v1 API, ranging from version 3.5.0 up to the latest beta, 5.0.0-beta05."],["`Optimistic` locking acquires locks during commit, while `Pessimistic` locking acquires locks immediately on read, and by default `Unspecified` utilizes pessimistic locking."]]],[]]
