Option for google::cloud::Options to indicate which replicas or regions should be used for reads/queries in read-only or single-use transactions.
Use of DirectedReadOptions within a read-write transaction will result in a kInvalidArgument error.
The IncludeReplicas variant lists the replicas to try (in order) to process the request, and what to do if the list is exhausted without finding a healthy replica.
Alternately, the ExcludeReplicas variant lists replicas that should be excluded from serving the request.
Type Aliases
Type
Alias Of: absl::variant< absl::monostate, IncludeReplicas, ExcludeReplicas >
[[["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 2025-03-14 UTC."],[[["This page provides documentation for the `DirectedReadOption` in the Google Cloud Spanner C++ library, covering versions from 2.11.0 to 2.37.0-rc."],["`DirectedReadOption` allows users to specify which replicas or regions should be used for read operations in read-only or single-use transactions."],["Using `DirectedReadOption` in a read-write transaction will lead to a `kInvalidArgument` error."],["The option supports two variants: `IncludeReplicas`, which specifies a list of replicas to try, and `ExcludeReplicas`, which lists replicas to avoid."],["`DirectedReadOption` is an alias for a variant that can hold `absl::monostate`, `IncludeReplicas`, or `ExcludeReplicas`."]]],[]]
