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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-22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 document details the \u003ccode\u003eResultSourceInterface\u003c/code\u003e for Google Cloud Spanner, specifically for version 2.20.0, and provides links to various other versions.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eResultSourceInterface\u003c/code\u003e defines how \u003ccode\u003eRowStream\u003c/code\u003e implementations should behave, which is a stream of rows received from \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 retrieves the subsequent row from the stream and can return an error within a \u003ccode\u003eStatusOr\u003c/code\u003e if the stream is interrupted.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eMetadata()\u003c/code\u003e and \u003ccode\u003eStats()\u003c/code\u003e functions can be used to return information about the result set, such as field types, transaction ID, row count, and the query plan, respectively.\u003c/p\u003e\n"],["\u003cp\u003eThe provided content allows users to interact with the \u003ccode\u003eRowStream\u003c/code\u003e class and can be mocked for testing purposes.\u003c/p\u003e\n"]]],[],null,[]]
