The nodes in the query plan. Plan nodes are returned in pre-order starting
with the plan root. Each [PlanNode][google.spanner.v1.PlanNode]'s id corresponds to its index in
plan_nodes.
[[["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 Google Cloud Spanner v1 API class `QueryPlan` provides reference documentation and code samples for users."],["The `QueryPlan` class is part of the `Google.Cloud.Spanner.V1` namespace and is found within the `Google.Cloud.Spanner.V1.dll` assembly."],["The latest version available is `5.0.0-beta05`, with multiple previous versions accessible, such as the currently displayed `4.5.0`."],["`QueryPlan` contains an ordered list of nodes in a query plan, with the root node appearing first in the `PlanNodes` property."],["`QueryPlan` implements interfaces such as `IMessage`, `IEquatable`, `IDeepCloneable`, and `IBufferMessage`."]]],[]]