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from airflow.contrib.hooks.bigquery_hook import BigQueryHook
from airflow.models import BaseOperator
from airflow.utils.decorators import apply_defaults
[docs]class BigQueryTableDeleteOperator(BaseOperator):
"""
Deletes BigQuery tables
:param deletion_dataset_table: A dotted
(<project>.|<project>:)<dataset>.<table> that indicates which table
will be deleted. (templated)
:type deletion_dataset_table: string
:param bigquery_conn_id: reference to a specific BigQuery hook.
:type bigquery_conn_id: string
:param delegate_to: The account to impersonate, if any.
For this to work, the service account making the request must have domain-wide
delegation enabled.
:type delegate_to: string
:param ignore_if_missing: if True, then return success even if the
requested table does not exist.
:type ignore_if_missing: boolean
"""
template_fields = ('deletion_dataset_table',)
ui_color = '#ffd1dc'
@apply_defaults
def __init__(self,
deletion_dataset_table,
bigquery_conn_id='bigquery_default',
delegate_to=None,
ignore_if_missing=False,
*args,
**kwargs):
super(BigQueryTableDeleteOperator, self).__init__(*args, **kwargs)
self.deletion_dataset_table = deletion_dataset_table
self.bigquery_conn_id = bigquery_conn_id
self.delegate_to = delegate_to
self.ignore_if_missing = ignore_if_missing
def execute(self, context):
self.log.info('Deleting: %s', self.deletion_dataset_table)
hook = BigQueryHook(bigquery_conn_id=self.bigquery_conn_id,
delegate_to=self.delegate_to)
conn = hook.get_conn()
cursor = conn.cursor()
cursor.run_table_delete(self.deletion_dataset_table, self.ignore_if_missing)