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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-07-08 UTC."],[[["This page provides documentation for the `ResultSourceInterface` in the Google Cloud Spanner C++ library, covering versions from 2.12.0 to 2.37.0-rc."],["The `ResultSourceInterface` defines how `RowStream` implementations handle streams of `Rows` returned from Spanner `Client` methods like `Read()` and `ExecuteQuery()`."],["The `NextRow()` function retrieves the next row from the stream, returning either a `StatusOr\u003cspanner::Row\u003e` or a `StatusOr\u003c\u003e` to indicate the end of the stream or an error, respectively."],["`Metadata()` and `Stats()` functions are available to retrieve result set metadata and statistics, with links to their respective Google Spanner RPC documentation."],["The page provides information about mocking the `ResultSourceInterface` during testing when mocking `spanner::Client` behavior."]]],[]]
