if the stream is interrupted due to a failure the StatusOr<spanner::Row> contains the error. The function returns a successful StatusOr<> with an empty spanner::Row to indicate end-of-stream.
Metadata()
Returns metadata about the result set, such as the field types and the transaction id created by the request.
[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-22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 page provides documentation for the \u003ccode\u003eResultSourceInterface\u003c/code\u003e in the Google Cloud Spanner C++ client library, covering versions from 2.11.0 up to the latest release candidate 2.37.0-rc.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eResultSourceInterface\u003c/code\u003e defines the interface for \u003ccode\u003eRowStream\u003c/code\u003e implementations, representing a stream of \u003ccode\u003eRows\u003c/code\u003e returned from operations like \u003ccode\u003espanner::Client::Read()\u003c/code\u003e or \u003ccode\u003espanner::Client::ExecuteQuery()\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eNextRow()\u003c/code\u003e function returns the next row in the stream, with error handling provided via \u003ccode\u003eStatusOr\u003c/code\u003e and end-of-stream indicated by a successful \u003ccode\u003eStatusOr\u003c/code\u003e containing an empty \u003ccode\u003espanner::Row\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eMetadata()\u003c/code\u003e function provides details about the result set, like field types and transaction IDs, while the \u003ccode\u003eStats()\u003c/code\u003e function offers statistics, such as the number of rows and the query plan used, as described by Result Set Metadata and Result Set Stats.\u003c/p\u003e\n"],["\u003cp\u003eMock implementations of \u003ccode\u003espanner::Client\u003c/code\u003e behavior can be performed via this class, as well as applications mocking this class when testing their code.\u003c/p\u003e\n"]]],[],null,[]]
