[[["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 2025-04-17 UTC."],[[["The latest version available is 3.12.0, but the current page content is related to version 3.3.0 of the Firestore Admin v1 API."],["This page provides reference documentation and code samples for the `Database.Types.ConcurrencyMode` enum within the Firestore Admin v1 API."],["The `ConcurrencyMode` enum defines the type of concurrency control mode for transactions, with options including `Optimistic`, `OptimisticWithEntityGroups`, `Pessimistic`, and `Unspecified`."],["`Optimistic` and `Pessimistic` modes are available for Cloud Firestore, while `OptimisticWithEntityGroups` is the only available mode for Cloud Datastore, though also available (but not recommended) for Firestore in Datastore mode, and `Unspecified` is not used."],["The `Pessimistic` concurrency control mode is the default for Cloud Firestore databases."]]],[]]
