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 latest version available is 5.0.0-beta05, while version 4.0.0 is also displayed with supporting documentation."],["The `QueryPlan` class, part of the `Google.Cloud.Spanner.V1` namespace, is detailed within this documentation, in addition to being found within the `Google.Cloud.Spanner.V1.dll` assembly."],["The `QueryPlan` class represents an ordered list of nodes in a query plan and implements interfaces such as `IMessage`, `IEquatable`, `IDeepCloneable`, and `IBufferMessage`."],["The `QueryPlan` class has two constructors, one default and another taking another `QueryPlan` object as a parameter."],["The primary property within the `QueryPlan` class is `PlanNodes`, which contains a `RepeatedField` of `PlanNode` objects, representing the nodes in the query plan, ordered in a specific way."]]],[]]