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BigQuery Storage Read API

pk flag
Sat

We have a proxy service sitting between the client and the BigQuery. This proxy service actually talks to BigQuery and sends back the data to the actual client.

We have a use case where I need to stream the data from BigQuery (data can be in the order of millions). We are evaluating to use the BQ Storage Read API to open a ReadSession and read disjoint sets of rows.

Now my question is two fold:

  1. When reading, does TableReadOptions support a query or it only supports selected fields? Reference example: https://cloud.google.com/bigquery/docs/reference/storage/libraries

  2. When new data is getting inserted, does the session.getStreamsCount() will get updated dynamically or will it be static (without including the new data that is coming to Big Query)?

We are looking for a way to stream the data that is already existing and also streaming the new records that are coming to BigQuery.

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