Dataflow read api

Use the Dataflow connector to read from a database without using a query by specifying a table name and a list of columns.

Explore further

For detailed documentation that includes this code sample, see the following:

• Import, export, and modify data using Dataflow

Code sample

Java

To learn how to install and use the client library for Spanner, see Spanner client libraries.

To authenticate to Spanner, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

// Query for all the columns and rows in the specified Spanner table
PCollection<Struct> records = pipeline.apply(
    SpannerIO.read()
        .withInstanceId(instanceId)
        .withDatabaseId(databaseId)
        .withTable("Singers")
        .withColumns("singerId", "firstName", "lastName"));

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