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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["\u003cp\u003eThe latest version of the Spanner C++ library connection interface is 2.37.0-rc, with several previous versions also available for reference, ranging down to version 2.11.0.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eConnection\u003c/code\u003e interface provides pure-virtual methods that mirror the user-facing overload sets found in the \u003ccode\u003eClient\u003c/code\u003e class, facilitating the injection of custom behavior for testing.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eConnection\u003c/code\u003e defines various methods for interacting with a Spanner database, including \u003ccode\u003eRead\u003c/code\u003e, \u003ccode\u003ePartitionRead\u003c/code\u003e, \u003ccode\u003eExecuteQuery\u003c/code\u003e, \u003ccode\u003eExecuteDml\u003c/code\u003e, \u003ccode\u003eCommit\u003c/code\u003e, \u003ccode\u003eRollback\u003c/code\u003e, and \u003ccode\u003eBatchWrite\u003c/code\u003e, each with corresponding parameter and return types.\u003c/p\u003e\n"],["\u003cp\u003eThis interface can return \u003ccode\u003eStatusOr\u003c/code\u003e types for various operations, allowing for error handling and reporting of various errors.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eMakeConnection()\u003c/code\u003e function is used to create a concrete connection to a real Spanner database.\u003c/p\u003e\n"]]],[],null,[]]
