I am not able to use the federated query capability from Google BigQuery to Google Cloud SQL Postgres. Google announced this federated query capability for BigQuery recently in beta state.
I use EXTERNAL_QUERY statement like described in documentation but am not able to connect to my Cloud SQL instance. For example with query
SELECT * FROM EXTERNAL_QUERY('my-project.europe-north1.my-connection', 'SELECT * FROM mytable;');
or
SELECT * FROM EXTERNAL_QUERY("my-project.europe-north1.pg1", "SELECT * FROM INFORMATION_SCHEMA.TABLES;");
I receive this error :
Invalid table-valued function EXTERNAL_QUERY Connection to PostgreSQL server failed: server closed the connection unexpectedly This probably means the server terminated abnormally before or while processing the request.
Sometimes the error is this:
Error encountered during execution. Retrying may solve the problem.
I have followed the instructions on page https://cloud.google.com/bigquery/docs/cloud-sql-federated-queries and enabled BigQuery Connection API. Some documents use different quotations for EXTERNAL_QUERY (“ or ‘ or ‘’’) but all the variants end with same result.
I cannot see any errors in stackdriver postgres logs. How could I correct this connectivity error? Any suggestions how to debug it further?
I just tried and it works, as far as the bigquery query runs in EU (as of today 6 October it works). My example:
SELECT * FROM EXTERNAL_QUERY("projects/xxxxx-xxxxxx/locations/europe-west1/connections/xxxxxx", "SELECT * FROM data.datos_ingresos_netos")
Just substitute the first xxxxs with your projectid and the last ones with the name you gave to the connection in The bigquery interface (not cloudsql info, that goes into the query)