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# 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

# http://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.

def load_table_uri_truncate_avro(table_id: str) -> None:

# [START bigquery_load_table_gcs_avro_truncate]

import io

from google.cloud import bigquery

# Construct a BigQuery client object.

client = bigquery.Client()

# TODO(developer): Set table_id to the ID of the table to create.

# table_id = "your-project.your_dataset.your_table_name

job_config = bigquery.LoadJobConfig(

schema=[

bigquery.SchemaField("name", "STRING"),

bigquery.SchemaField("post_abbr", "STRING"),

)

body = io.BytesIO(b"Washington,WA")

client.load_table_from_file(body, table_id, job_config=job_config).result()

previous_rows = client.get_table(table_id).num_rows

assert previous_rows > 0

job_config = bigquery.LoadJobConfig(

write_disposition=bigquery.WriteDisposition.WRITE_TRUNCATE,

source_format=bigquery.SourceFormat.AVRO,

)

uri = "gs://cloud-samples-data/bigquery/us-states/us-states.avro"

load_job = client.load_table_from_uri(

uri, table_id, job_config=job_config

) # Make an API request.

load_job.result() # Waits for the job to complete.

destination_table = client.get_table(table_id)

print("Loaded {} rows.".format(destination_table.num_rows))

# [END bigquery_load_table_gcs_avro_truncate]

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