Google Cloud BigQuery Transfer Operator to Postgres¶

Google Cloud BigQuery is Google Cloud’s serverless data warehouse offering. PostgreSQL is an open-source relational database management system. This operator can be used to copy data from a BigQuery table to PostgreSQL.

Prerequisite Tasks¶

Operator¶

Copying data from BigQuery table to Postgres table is performed with the BigQueryToPostgresOperator operator.

Use Jinja templating with target_table_name, impersonation_chain, dataset_id, table_id to define values dynamically.

You may use the parameter selected_fields to limit the fields to be copied (all fields by default), as well as the parameter replace to overwrite the destination table instead of appending to it. For more information, please refer to the links above.

Transferring data¶

The following Operator copies data from a BigQuery table to PostgreSQL.

tests/system/providers/google/cloud/bigquery/example_bigquery_to_postgres.py[source]

bigquery_to_postgres = BigQueryToPostgresOperator(
    task_id="bigquery_to_postgres",
    dataset_table=f"{DATASET_NAME}.{TABLE}",
    target_table_name=destination_table,
    replace=False,
)

Reference¶

For further information, look at: