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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-07-02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 page provides documentation for the `ResultSourceInterface` in the Google Cloud Spanner C++ client library, covering versions from 2.11.0 up to the latest release candidate 2.37.0-rc."],["The `ResultSourceInterface` defines the interface for `RowStream` implementations, representing a stream of `Rows` returned from operations like `spanner::Client::Read()` or `spanner::Client::ExecuteQuery()`."],["The `NextRow()` function returns the next row in the stream, with error handling provided via `StatusOr` and end-of-stream indicated by a successful `StatusOr` containing an empty `spanner::Row`."],["The `Metadata()` function provides details about the result set, like field types and transaction IDs, while the `Stats()` function offers statistics, such as the number of rows and the query plan used, as described by Result Set Metadata and Result Set Stats."],["Mock implementations of `spanner::Client` behavior can be performed via this class, as well as applications mocking this class when testing their code."]]],[]]
