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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-22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\u003eThe page provides documentation for the \u003ccode\u003eResultSourceInterface\u003c/code\u003e in the Google Cloud Spanner C++ client library, with the latest version being \u003ccode\u003e2.37.0-rc\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThis interface defines the functionality for \u003ccode\u003eRowStream\u003c/code\u003e implementations, which are used to handle streams of rows returned from Spanner \u003ccode\u003eRead()\u003c/code\u003e and \u003ccode\u003eExecuteQuery()\u003c/code\u003e operations.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eNextRow()\u003c/code\u003e function allows you to retrieve the next row from the stream, or it returns an error if a failure is encountered, or a successful empty \u003ccode\u003eRow\u003c/code\u003e if the stream is finished.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eMetadata()\u003c/code\u003e function provides information about the result set, and the \u003ccode\u003eStats()\u003c/code\u003e function gives access to result set statistics, like row counts and the query plan.\u003c/p\u003e\n"],["\u003cp\u003eMultiple previous versions of the \u003ccode\u003eResultSourceInterface\u003c/code\u003e, dating back to version \u003ccode\u003e2.11.0\u003c/code\u003e, are also available on this page.\u003c/p\u003e\n"]]],[],null,[]]
