Created
May 5, 2020 03:37
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BigQuery Copy Datasets
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| from google.cloud import bigquery | |
| client = bigquery.Client() | |
| projectFrom = '' | |
| datasetFrom = '' | |
| projectTo = '' | |
| datasetTo = '' | |
| # Creating dataset reference from google bigquery cient | |
| dataset_from = client.dataset(dataset_id=datasetFrom, project=projectFrom) | |
| dataset_to = client.dataset(dataset_id=datasetTo, project=projectTo) | |
| tables = list(client.list_tables(dataset_from)) | |
| print(tables) | |
| for source_table_ref in tables: | |
| # Destination table reference | |
| destination_table_ref = dataset_to.table(source_table_ref.table_id) | |
| job = client.copy_table( | |
| source_table_ref, | |
| destination_table_ref) | |
| job.result() | |
| assert job.state == 'DONE' | |
| dest_table = client.get_table(destination_table_ref) | |
| source_table = client.get_table(source_table_ref) | |
| assert dest_table.num_rows > 0 # validation 1 | |
| assert dest_table.num_rows == source_table.num_rows # validation 2 | |
| print ("Source - table: {} row count {}".format(source_table.table_id,source_table.num_rows )) | |
| print ("Destination - table: {} row count {}".format(dest_table.table_id, dest_table.num_rows)) |
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