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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-07-02 UTC."],[[["This document details the `ResultSourceInterface` for Google Cloud Spanner's C++ client library, focusing on version 2.18.0, but also including links to many other versions."],["The `ResultSourceInterface` defines how to interact with streams of rows, known as `RowStream`, which are the result of `spanner::Client::Read()` or `spanner::Client::ExecuteQuery()` operations."],["The `NextRow()` function allows you to retrieve the next row in the stream, with error handling if there are any issues."],["The `Metadata()` function provides details about the result set, such as field types and the transaction ID, while `Stats()` provides information on the results."],["This class is useful for applications, but can also be mocked when testing code that interacts with the `spanner::Client`."]]],[]]
