def validate(self, parsed_args, client=None):
output_table_re_match = re.match(
r'^((?P<project>.+):)(?P<dataset>\w+)\.(?P<table>[\w\$]+)$',
parsed_args.output_table)
if not output_table_re_match:
raise ValueError(
'Expected a table reference (PROJECT:DATASET.TABLE) '
'instead of {}.'.format(parsed_args.output_table))
try:
if not client:
credentials = GoogleCredentials.get_application_default(
).create_scoped(['https://www.googleapis.com/auth/bigquery'])
client = bigquery.BigqueryV2(credentials=credentials)
client.datasets.Get(
bigquery.BigqueryDatasetsGetRequest(
projectId=output_table_re_match.group('project'),
datasetId=output_table_re_match.group('dataset')))
except exceptions.HttpError as e:
if e.status_code == 404:
raise ValueError('Dataset %s:%s does not exist.' %
(output_table_re_match.group('project'),
output_table_re_match.group('dataset')))
else:
# For the rest of the errors, use BigQuery error message.
raise
def raise_error_if_dataset_not_exists(client, project_id, dataset_id):
# type: (beam_bigquery.BigqueryV2, str, str) -> None
try:
client.datasets.Get(
beam_bigquery.BigqueryDatasetsGetRequest(projectId=project_id,
datasetId=dataset_id))
except exceptions.HttpError as e:
if e.status_code == 404:
raise ValueError('Dataset %s:%s does not exist.' %
(project_id, dataset_id)) from e
# For the rest of the errors, use BigQuery error message.
raise
def clean_up_temporary_dataset(self, project_id):
temp_table = self._get_temp_table(project_id)
try:
self.client.datasets.Get(bigquery.BigqueryDatasetsGetRequest(
projectId=project_id, datasetId=temp_table.datasetId))
except HttpError as exn:
if exn.status_code == 404:
logging.warning('Dataset %s:%s does not exist', project_id,
temp_table.datasetId)
return
else:
raise
self._delete_dataset(temp_table.projectId, temp_table.datasetId, True)
def validate(self, parsed_args, client=None):
# type: (argparse.Namespace, bigquery.BigqueryV2) -> None
if not parsed_args.output_table and parsed_args.output_avro_path:
# Writing into BigQuery is not requested; no more BigQuery checks needed.
return
output_table_re_match = re.match(
r'^((?P<project>.+):)(?P<dataset>\w+)\.(?P<table>[\w\$]+)$',
parsed_args.output_table)
if not output_table_re_match:
raise ValueError(
'Expected a table reference (PROJECT:DATASET.TABLE) '
'instead of {}.'.format(parsed_args.output_table))
if not client:
credentials = GoogleCredentials.get_application_default(
).create_scoped(['https://www.googleapis.com/auth/bigquery'])
client = bigquery.BigqueryV2(credentials=credentials)
project_id = output_table_re_match.group('project')
dataset_id = output_table_re_match.group('dataset')
table_id = output_table_re_match.group('table')
try:
client.datasets.Get(
bigquery.BigqueryDatasetsGetRequest(projectId=project_id,
datasetId=dataset_id))
except exceptions.HttpError as e:
if e.status_code == 404:
raise ValueError('Dataset %s:%s does not exist.' %
(project_id, dataset_id))
else:
# For the rest of the errors, use BigQuery error message.
raise
# Ensuring given output table doesn't already exist to avoid overwriting it.
if not parsed_args.append:
if parsed_args.update_schema_on_append:
raise ValueError(
'--update_schema_on_append requires --append to be '
'true.')
try:
client.tables.Get(
bigquery.BigqueryTablesGetRequest(projectId=project_id,
datasetId=dataset_id,
tableId=table_id))
raise ValueError(
'Table %s:%s.%s already exists, cannot overwrite it.' %
(project_id, dataset_id, table_id))
except exceptions.HttpError as e:
if e.status_code == 404:
# This is expected, output table must not already exist
pass
else:
# For the rest of the errors, use BigQuery error message.
raise
def create_temporary_dataset(self, project_id):
dataset_id = BigQueryWrapper.TEMP_DATASET + self._temporary_table_suffix
# Check if dataset exists to make sure that the temporary id is unique
try:
self.client.datasets.Get(bigquery.BigqueryDatasetsGetRequest(
projectId=project_id, datasetId=dataset_id))
if project_id is not None:
# Unittests don't pass projectIds so they can be run without error
raise RuntimeError(
'Dataset %s:%s already exists so cannot be used as temporary.'
% (project_id, dataset_id))
except HttpError as exn:
if exn.status_code == 404:
logging.warning('Dataset does not exist so we will create it')
self.get_or_create_dataset(project_id, dataset_id)
else:
raise
def get_or_create_dataset(self, project_id, dataset_id):
# Check if dataset already exists otherwise create it
try:
dataset = self.client.datasets.Get(bigquery.BigqueryDatasetsGetRequest(
projectId=project_id, datasetId=dataset_id))
return dataset
except HttpError as exn:
if exn.status_code == 404:
dataset = bigquery.Dataset(
datasetReference=bigquery.DatasetReference(
projectId=project_id, datasetId=dataset_id))
request = bigquery.BigqueryDatasetsInsertRequest(
projectId=project_id, dataset=dataset)
response = self.client.datasets.Insert(request)
# The response is a bigquery.Dataset instance.
return response
else:
raise
