This interface defines pure-virtual methods for each of the user-facing overload sets in Client. That is, all of Client's Read() overloads will forward to the one pure-virtual Read() method declared in this interface, and similar for Client's other methods. This allows users to inject custom behavior (e.g., with a Google Mock object) in a Client object for use in their own tests.
To create a concrete instance that connects you to a real Spanner database, see MakeConnection().
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-22 UTC."],[[["\u003cp\u003eThis document details the \u003ccode\u003eConnection\u003c/code\u003e interface for the Google Cloud Spanner C++ client library, with Version 2.15.1 being the current focus.\u003c/p\u003e\n"],["\u003cp\u003eThe document provides a comprehensive list of previous version references, ranging from 2.37.0-rc (latest) down to 2.11.0, for the \u003ccode\u003eConnection\u003c/code\u003e class.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eConnection\u003c/code\u003e interface defines pure-virtual methods that mirror the user-facing methods in the \u003ccode\u003eClient\u003c/code\u003e class, allowing for custom behavior injection, such as mocking.\u003c/p\u003e\n"],["\u003cp\u003eIt outlines the various functions included within the \u003ccode\u003eConnection\u003c/code\u003e interface such as \u003ccode\u003eRead\u003c/code\u003e, \u003ccode\u003eExecuteQuery\u003c/code\u003e, \u003ccode\u003eCommit\u003c/code\u003e, \u003ccode\u003eRollback\u003c/code\u003e, \u003ccode\u003eExecuteBatchDml\u003c/code\u003e, and more, including their respective parameters and return types.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eMakeConnection()\u003c/code\u003e is the function to use to connect to a real Spanner database.\u003c/p\u003e\n"]]],[],null,[]]
