Dataflow read

Use a SQL query with the Dataflow connector to read data from all the columns and rows in the specified table.

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Code sample

Java

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

// Query for all the columns and rows in the specified Spanner table
PCollection<Struct> records = p.apply(
    SpannerIO.read()
        .withInstanceId(instanceId)
        .withDatabaseId(databaseId)
        .withQuery("SELECT * FROM " + options.getTable()));

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