This issue tracks the implementation of the core workflow for executing GoogleSQL queries in the Bigtable Go client library. This includes the following steps:

1. Prepare: The client sends a PrepareQuery request to the server with the SQL query. The server returns a PreparedQuery object that contains the execution plan.
2. Bind: The client can then bind parameters to the PreparedQuery object to create a BoundQuery.
3. Execute: The client sends an ExecuteQuery request with the BoundQuery to the server. The server executes the query and streams the results back to the client.

This workflow allows for efficient execution of queries, as the query only needs to be prepared once and can then be executed multiple times with different parameters.