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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-22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 webpage provides documentation for the \u003ccode\u003eResultSourceInterface\u003c/code\u003e in the Google Cloud Spanner C++ library, with a focus on versions ranging from 2.11.0 to 2.37.0-rc.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eResultSourceInterface\u003c/code\u003e defines how to get the next row in a stream, as implemented in the \u003ccode\u003eRowStream\u003c/code\u003e class, returned by methods such as \u003ccode\u003espanner::Client::Read()\u003c/code\u003e and \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, or a \u003ccode\u003eStatusOr\u003c/code\u003e object indicating an error or end-of-stream.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eMetadata()\u003c/code\u003e can be called to retrieve metadata related to the result set, like field types and transaction IDs.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eStats()\u003c/code\u003e function can be called to retrieve statistics about the result set, for example, the number of rows and the query plan used.\u003c/p\u003e\n"]]],[],null,[]]
