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# Copyright 2019 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import typing
from typing import Union
if typing.TYPE_CHECKING:
from google.cloud.bigquery import LoadJob, CopyJob, ExtractJob, QueryJob
def create_job() -> "Union[LoadJob, CopyJob, ExtractJob, QueryJob]":
# [START bigquery_create_job]
from google.cloud import bigquery
# Construct a BigQuery client object.
client = bigquery.Client()
query_job = client.create_job(
# Specify a job configuration, providing a query
# and/or optional job resource properties, as needed.
# The job instance can be a LoadJob, CopyJob, ExtractJob, QueryJob
# Here, we demonstrate a "query" job.
# References:
# https://googleapis.dev/python/bigquery/latest/generated/google.cloud.bigquery.client.Client.html#google.cloud.bigquery.client.Client.create_job
# https://cloud.google.com/bigquery/docs/reference/rest/v2/Job
#
# Example use cases for .create_job() include:
# * to retry failed jobs
# * to generate jobs with an experimental API property that hasn't
# been added to one of the manually written job configuration
# classes yet
#
# NOTE: unless it is necessary to create a job in this way, the
# preferred approach is to use one of the dedicated API calls:
# client.query()
# client.extract_table()
# client.copy_table()
# client.load_table_file(), client.load_table_from_dataframe(), etc
job_config={
"query": {
"query": """
SELECT country_name
FROM `bigquery-public-data.utility_us.country_code_iso`
LIMIT 5
""",
},
"labels": {"example-label": "example-value"},
"maximum_bytes_billed": 10000000,
}
) # Make an API request.
print(f"Started job: {query_job.job_id}")
# [END bigquery_create_job]
return query_job
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