#
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# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
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# 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
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# KIND, either express or implied. See the License for the
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"""
This module contains a BigQuery Hook, as well as a very basic PEP 249
implementation for BigQuery.
"""
import hashlib
import json
import logging
import re
import time
import uuid
import warnings
from copy import deepcopy
from datetime import datetime, timedelta
from typing import Any, Dict, Iterable, List, Mapping, NoReturn, Optional, Sequence, Tuple, Type, Union
from google.api_core.retry import Retry
from google.cloud.bigquery import (
DEFAULT_RETRY,
Client,
CopyJob,
ExternalConfig,
ExtractJob,
LoadJob,
QueryJob,
SchemaField,
)
from google.cloud.bigquery.dataset import AccessEntry, Dataset, DatasetListItem, DatasetReference
from google.cloud.bigquery.table import EncryptionConfiguration, Row, Table, TableReference
from google.cloud.exceptions import NotFound
from googleapiclient.discovery import Resource, build
from pandas import DataFrame
from pandas_gbq import read_gbq
from pandas_gbq.gbq import GbqConnector # noqa
from sqlalchemy import create_engine
from airflow.exceptions import AirflowException
from airflow.providers.common.sql.hooks.sql import DbApiHook
from airflow.providers.google.common.consts import CLIENT_INFO
from airflow.providers.google.common.hooks.base_google import GoogleBaseHook
from airflow.utils.helpers import convert_camel_to_snake
from airflow.utils.log.logging_mixin import LoggingMixin
[docs]log = logging.getLogger(__name__)
[docs]BigQueryJob = Union[CopyJob, QueryJob, LoadJob, ExtractJob]
[docs]class BigQueryHook(GoogleBaseHook, DbApiHook):
"""
Interact with BigQuery. This hook uses the Google Cloud connection.
:param gcp_conn_id: The Airflow connection used for GCP credentials.
:param delegate_to: This performs a task on one host with reference to other hosts.
:param use_legacy_sql: This specifies whether to use legacy SQL dialect.
:param location: The location of the BigQuery resource.
:param api_resource_configs: This contains params configuration applied for Google BigQuery jobs.
:param impersonation_chain: This is the optional service account to impersonate using short term
credentials.
:param labels: The BigQuery resource label.
"""
[docs] conn_name_attr = 'gcp_conn_id'
[docs] default_conn_name = 'google_cloud_bigquery_default'
[docs] conn_type = 'gcpbigquery'
[docs] hook_name = 'Google Bigquery'
def __init__(
self,
gcp_conn_id: str = GoogleBaseHook.default_conn_name,
delegate_to: Optional[str] = None,
use_legacy_sql: bool = True,
location: Optional[str] = None,
api_resource_configs: Optional[Dict] = None,
impersonation_chain: Optional[Union[str, Sequence[str]]] = None,
labels: Optional[Dict] = None,
) -> None:
super().__init__(
gcp_conn_id=gcp_conn_id,
delegate_to=delegate_to,
impersonation_chain=impersonation_chain,
)
self.use_legacy_sql = use_legacy_sql
self.location = location
self.running_job_id = None # type: Optional[str]
self.api_resource_configs = api_resource_configs if api_resource_configs else {} # type Dict
self.labels = labels
self.credentials_path = "bigquery_hook_credentials.json"
[docs] def get_conn(self) -> "BigQueryConnection":
"""Returns a BigQuery PEP 249 connection object."""
service = self.get_service()
return BigQueryConnection(
service=service,
project_id=self.project_id,
use_legacy_sql=self.use_legacy_sql,
location=self.location,
num_retries=self.num_retries,
hook=self,
)
[docs] def get_service(self) -> Resource:
"""Returns a BigQuery service object."""
warnings.warn(
"This method will be deprecated. Please use `BigQueryHook.get_client` method", DeprecationWarning
)
http_authorized = self._authorize()
return build('bigquery', 'v2', http=http_authorized, cache_discovery=False)
[docs] def get_client(self, project_id: Optional[str] = None, location: Optional[str] = None) -> Client:
"""
Returns authenticated BigQuery Client.
:param project_id: Project ID for the project which the client acts on behalf of.
:param location: Default location for jobs / datasets / tables.
:return:
"""
return Client(
client_info=CLIENT_INFO,
project=project_id,
location=location,
credentials=self._get_credentials(),
)
[docs] def get_uri(self) -> str:
"""Override DbApiHook get_uri method for get_sqlalchemy_engine()"""
return f"bigquery://{self.project_id}"
[docs] def get_sqlalchemy_engine(self, engine_kwargs=None):
"""
Get an sqlalchemy_engine object.
:param engine_kwargs: Kwargs used in :func:`~sqlalchemy.create_engine`.
:return: the created engine.
"""
if engine_kwargs is None:
engine_kwargs = {}
connection = self.get_connection(self.gcp_conn_id)
if connection.extra_dejson.get("extra__google_cloud_platform__key_path"):
credentials_path = connection.extra_dejson['extra__google_cloud_platform__key_path']
return create_engine(self.get_uri(), credentials_path=credentials_path, **engine_kwargs)
elif connection.extra_dejson.get("extra__google_cloud_platform__keyfile_dict"):
credential_file_content = json.loads(
connection.extra_dejson["extra__google_cloud_platform__keyfile_dict"]
)
return create_engine(self.get_uri(), credentials_info=credential_file_content, **engine_kwargs)
try:
# 1. If the environment variable GOOGLE_APPLICATION_CREDENTIALS is set
# ADC uses the service account key or configuration file that the variable points to.
# 2. If the environment variable GOOGLE_APPLICATION_CREDENTIALS isn't set
# ADC uses the service account that is attached to the resource that is running your code.
return create_engine(self.get_uri(), **engine_kwargs)
except Exception as e:
self.log.error(e)
raise AirflowException(
"For now, we only support instantiating SQLAlchemy engine by"
" using ADC"
", extra__google_cloud_platform__key_path"
"and extra__google_cloud_platform__keyfile_dict"
)
[docs] def get_records(self, sql, parameters=None):
if self.location is None:
raise AirflowException("Need to specify 'location' to use BigQueryHook.get_records()")
return super().get_records(sql, parameters=parameters)
@staticmethod
def _resolve_table_reference(
table_resource: Dict[str, Any],
project_id: Optional[str] = None,
dataset_id: Optional[str] = None,
table_id: Optional[str] = None,
) -> Dict[str, Any]:
try:
# Check if tableReference is present and is valid
TableReference.from_api_repr(table_resource["tableReference"])
except KeyError:
# Something is wrong so we try to build the reference
table_resource["tableReference"] = table_resource.get("tableReference", {})
values = [("projectId", project_id), ("tableId", table_id), ("datasetId", dataset_id)]
for key, value in values:
# Check if value is already present if no use the provided one
resolved_value = table_resource["tableReference"].get(key, value)
if not resolved_value:
# If there's no value in tableReference and provided one is None raise error
raise AirflowException(
f"Table resource is missing proper `tableReference` and `{key}` is None"
)
table_resource["tableReference"][key] = resolved_value
return table_resource
[docs] def insert_rows(
self,
table: Any,
rows: Any,
target_fields: Any = None,
commit_every: Any = 1000,
replace: Any = False,
**kwargs,
) -> None:
"""
Insertion is currently unsupported. Theoretically, you could use
BigQuery's streaming API to insert rows into a table, but this hasn't
been implemented.
"""
raise NotImplementedError()
[docs] def get_pandas_df(
self,
sql: str,
parameters: Optional[Union[Iterable, Mapping]] = None,
dialect: Optional[str] = None,
**kwargs,
) -> DataFrame:
"""
Returns a Pandas DataFrame for the results produced by a BigQuery
query. The DbApiHook method must be overridden because Pandas
doesn't support PEP 249 connections, except for SQLite. See:
https://github.com/pydata/pandas/blob/master/pandas/io/sql.py#L447
https://github.com/pydata/pandas/issues/6900
:param sql: The BigQuery SQL to execute.
:param parameters: The parameters to render the SQL query with (not
used, leave to override superclass method)
:param dialect: Dialect of BigQuery SQL – legacy SQL or standard SQL
defaults to use `self.use_legacy_sql` if not specified
:param kwargs: (optional) passed into pandas_gbq.read_gbq method
"""
if dialect is None:
dialect = 'legacy' if self.use_legacy_sql else 'standard'
credentials, project_id = self._get_credentials_and_project_id()
return read_gbq(
sql, project_id=project_id, dialect=dialect, verbose=False, credentials=credentials, **kwargs
)
@GoogleBaseHook.fallback_to_default_project_id
[docs] def table_exists(self, dataset_id: str, table_id: str, project_id: str) -> bool:
"""
Checks for the existence of a table in Google BigQuery.
:param project_id: The Google cloud project in which to look for the
table. The connection supplied to the hook must provide access to
the specified project.
:param dataset_id: The name of the dataset in which to look for the
table.
:param table_id: The name of the table to check the existence of.
"""
table_reference = TableReference(DatasetReference(project_id, dataset_id), table_id)
try:
self.get_client(project_id=project_id).get_table(table_reference)
return True
except NotFound:
return False
@GoogleBaseHook.fallback_to_default_project_id
[docs] def table_partition_exists(
self, dataset_id: str, table_id: str, partition_id: str, project_id: str
) -> bool:
"""
Checks for the existence of a partition in a table in Google BigQuery.
:param project_id: The Google cloud project in which to look for the
table. The connection supplied to the hook must provide access to
the specified project.
:param dataset_id: The name of the dataset in which to look for the
table.
:param table_id: The name of the table to check the existence of.
:param partition_id: The name of the partition to check the existence of.
"""
table_reference = TableReference(DatasetReference(project_id, dataset_id), table_id)
try:
return partition_id in self.get_client(project_id=project_id).list_partitions(table_reference)
except NotFound:
return False
@GoogleBaseHook.fallback_to_default_project_id
[docs] def create_empty_table(
self,
project_id: Optional[str] = None,
dataset_id: Optional[str] = None,
table_id: Optional[str] = None,
table_resource: Optional[Dict[str, Any]] = None,
schema_fields: Optional[List] = None,
time_partitioning: Optional[Dict] = None,
cluster_fields: Optional[List[str]] = None,
labels: Optional[Dict] = None,
view: Optional[Dict] = None,
materialized_view: Optional[Dict] = None,
encryption_configuration: Optional[Dict] = None,
retry: Optional[Retry] = DEFAULT_RETRY,
location: Optional[str] = None,
exists_ok: bool = True,
) -> Table:
"""
Creates a new, empty table in the dataset.
To create a view, which is defined by a SQL query, parse a dictionary to 'view' kwarg
:param project_id: The project to create the table into.
:param dataset_id: The dataset to create the table into.
:param table_id: The Name of the table to be created.
:param table_resource: Table resource as described in documentation:
https://cloud.google.com/bigquery/docs/reference/rest/v2/tables#Table
If provided all other parameters are ignored.
:param schema_fields: If set, the schema field list as defined here:
https://cloud.google.com/bigquery/docs/reference/rest/v2/jobs#configuration.load.schema
:param labels: a dictionary containing labels for the table, passed to BigQuery
:param retry: Optional. How to retry the RPC.
**Example**: ::
schema_fields=[{"name": "emp_name", "type": "STRING", "mode": "REQUIRED"},
{"name": "salary", "type": "INTEGER", "mode": "NULLABLE"}]
:param time_partitioning: configure optional time partitioning fields i.e.
partition by field, type and expiration as per API specifications.
.. seealso::
https://cloud.google.com/bigquery/docs/reference/rest/v2/tables#timePartitioning
:param cluster_fields: [Optional] The fields used for clustering.
BigQuery supports clustering for both partitioned and
non-partitioned tables.
https://cloud.google.com/bigquery/docs/reference/rest/v2/tables#clustering.fields
:param view: [Optional] A dictionary containing definition for the view.
If set, it will create a view instead of a table:
https://cloud.google.com/bigquery/docs/reference/rest/v2/tables#ViewDefinition
**Example**: ::
view = {
"query": "SELECT * FROM `test-project-id.test_dataset_id.test_table_prefix*` LIMIT 1000",
"useLegacySql": False
}
:param materialized_view: [Optional] The materialized view definition.
:param encryption_configuration: [Optional] Custom encryption configuration (e.g., Cloud KMS keys).
**Example**: ::
encryption_configuration = {
"kmsKeyName": "projects/testp/locations/us/keyRings/test-kr/cryptoKeys/test-key"
}
:param num_retries: Maximum number of retries in case of connection problems.
:param location: (Optional) The geographic location where the table should reside.
:param exists_ok: If ``True``, ignore "already exists" errors when creating the table.
:return: Created table
"""
_table_resource: Dict[str, Any] = {}
if self.location:
_table_resource['location'] = self.location
if schema_fields:
_table_resource['schema'] = {'fields': schema_fields}
if time_partitioning:
_table_resource['timePartitioning'] = time_partitioning
if cluster_fields:
_table_resource['clustering'] = {'fields': cluster_fields}
if labels:
_table_resource['labels'] = labels
if view:
_table_resource['view'] = view
if materialized_view:
_table_resource['materializedView'] = materialized_view
if encryption_configuration:
_table_resource["encryptionConfiguration"] = encryption_configuration
table_resource = table_resource or _table_resource
table_resource = self._resolve_table_reference(
table_resource=table_resource,
project_id=project_id,
dataset_id=dataset_id,
table_id=table_id,
)
table = Table.from_api_repr(table_resource)
return self.get_client(project_id=project_id, location=location).create_table(
table=table, exists_ok=exists_ok, retry=retry
)
@GoogleBaseHook.fallback_to_default_project_id
[docs] def create_empty_dataset(
self,
dataset_id: Optional[str] = None,
project_id: Optional[str] = None,
location: Optional[str] = None,
dataset_reference: Optional[Dict[str, Any]] = None,
exists_ok: bool = True,
) -> Dict[str, Any]:
"""
Create a new empty dataset:
https://cloud.google.com/bigquery/docs/reference/rest/v2/datasets/insert
:param project_id: The name of the project where we want to create
an empty a dataset. Don't need to provide, if projectId in dataset_reference.
:param dataset_id: The id of dataset. Don't need to provide, if datasetId in dataset_reference.
:param location: (Optional) The geographic location where the dataset should reside.
There is no default value but the dataset will be created in US if nothing is provided.
:param dataset_reference: Dataset reference that could be provided with request body. More info:
https://cloud.google.com/bigquery/docs/reference/rest/v2/datasets#resource
:param exists_ok: If ``True``, ignore "already exists" errors when creating the dataset.
"""
dataset_reference = dataset_reference or {"datasetReference": {}}
for param, value in zip(["datasetId", "projectId"], [dataset_id, project_id]):
specified_param = dataset_reference["datasetReference"].get(param)
if specified_param:
if value:
self.log.info(
"`%s` was provided in both `dataset_reference` and as `%s`. "
"Using value from `dataset_reference`",
param,
convert_camel_to_snake(param),
)
continue # use specified value
if not value:
raise ValueError(
f"Please specify `{param}` either in `dataset_reference` "
f"or by providing `{convert_camel_to_snake(param)}`",
)
# dataset_reference has no param but we can fallback to default value
self.log.info(
"%s was not specified in `dataset_reference`. Will use default value %s.", param, value
)
dataset_reference["datasetReference"][param] = value
location = location or self.location
if location:
dataset_reference["location"] = dataset_reference.get("location", location)
dataset: Dataset = Dataset.from_api_repr(dataset_reference)
self.log.info('Creating dataset: %s in project: %s ', dataset.dataset_id, dataset.project)
dataset_object = self.get_client(location=location).create_dataset(
dataset=dataset, exists_ok=exists_ok
)
self.log.info('Dataset created successfully.')
return dataset_object.to_api_repr()
@GoogleBaseHook.fallback_to_default_project_id
[docs] def get_dataset_tables(
self,
dataset_id: str,
project_id: Optional[str] = None,
max_results: Optional[int] = None,
retry: Retry = DEFAULT_RETRY,
) -> List[Dict[str, Any]]:
"""
Get the list of tables for a given dataset.
For more information, see:
https://cloud.google.com/bigquery/docs/reference/rest/v2/tables/list
:param dataset_id: the dataset ID of the requested dataset.
:param project_id: (Optional) the project of the requested dataset. If None,
self.project_id will be used.
:param max_results: (Optional) the maximum number of tables to return.
:param retry: How to retry the RPC.
:return: List of tables associated with the dataset.
"""
self.log.info('Start getting tables list from dataset: %s.%s', project_id, dataset_id)
tables = self.get_client().list_tables(
dataset=DatasetReference(project=project_id, dataset_id=dataset_id),
max_results=max_results,
retry=retry,
)
# Convert to a list (consumes all values)
return [t.reference.to_api_repr() for t in tables]
@GoogleBaseHook.fallback_to_default_project_id
[docs] def delete_dataset(
self,
dataset_id: str,
project_id: Optional[str] = None,
delete_contents: bool = False,
retry: Retry = DEFAULT_RETRY,
) -> None:
"""
Delete a dataset of Big query in your project.
:param project_id: The name of the project where we have the dataset.
:param dataset_id: The dataset to be delete.
:param delete_contents: If True, delete all the tables in the dataset.
If False and the dataset contains tables, the request will fail.
:param retry: How to retry the RPC.
"""
self.log.info('Deleting from project: %s Dataset:%s', project_id, dataset_id)
self.get_client(project_id=project_id).delete_dataset(
dataset=DatasetReference(project=project_id, dataset_id=dataset_id),
delete_contents=delete_contents,
retry=retry,
not_found_ok=True,
)
@GoogleBaseHook.fallback_to_default_project_id
[docs] def create_external_table(
self,
external_project_dataset_table: str,
schema_fields: List,
source_uris: List,
source_format: str = 'CSV',
autodetect: bool = False,
compression: str = 'NONE',
ignore_unknown_values: bool = False,
max_bad_records: int = 0,
skip_leading_rows: int = 0,
field_delimiter: str = ',',
quote_character: Optional[str] = None,
allow_quoted_newlines: bool = False,
allow_jagged_rows: bool = False,
encoding: str = "UTF-8",
src_fmt_configs: Optional[Dict] = None,
labels: Optional[Dict] = None,
description: Optional[str] = None,
encryption_configuration: Optional[Dict] = None,
location: Optional[str] = None,
project_id: Optional[str] = None,
) -> Table:
"""
Creates a new external table in the dataset with the data from Google
Cloud Storage. See here:
https://cloud.google.com/bigquery/docs/reference/rest/v2/tables#resource
for more details about these parameters.
:param external_project_dataset_table:
The dotted ``(<project>.|<project>:)<dataset>.<table>($<partition>)`` BigQuery
table name to create external table.
If ``<project>`` is not included, project will be the
project defined in the connection json.
:param schema_fields: The schema field list as defined here:
https://cloud.google.com/bigquery/docs/reference/rest/v2/tables#resource
:param source_uris: The source Google Cloud
Storage URI (e.g. gs://some-bucket/some-file.txt). A single wild
per-object name can be used.
:param source_format: File format to export.
:param autodetect: Try to detect schema and format options automatically.
Any option specified explicitly will be honored.
:param compression: [Optional] The compression type of the data source.
Possible values include GZIP and NONE.
The default value is NONE.
This setting is ignored for Google Cloud Bigtable,
Google Cloud Datastore backups and Avro formats.
:param ignore_unknown_values: [Optional] Indicates if BigQuery should allow
extra values that are not represented in the table schema.
If true, the extra values are ignored. If false, records with extra columns
are treated as bad records, and if there are too many bad records, an
invalid error is returned in the job result.
:param max_bad_records: The maximum number of bad records that BigQuery can
ignore when running the job.
:param skip_leading_rows: Number of rows to skip when loading from a CSV.
:param field_delimiter: The delimiter to use when loading from a CSV.
:param quote_character: The value that is used to quote data sections in a CSV
file.
:param allow_quoted_newlines: Whether to allow quoted newlines (true) or not
(false).
:param allow_jagged_rows: Accept rows that are missing trailing optional columns.
The missing values are treated as nulls. If false, records with missing
trailing columns are treated as bad records, and if there are too many bad
records, an invalid error is returned in the job result. Only applicable when
source_format is CSV.
:param encoding: The character encoding of the data. See:
.. seealso::
https://cloud.google.com/bigquery/docs/reference/rest/v2/tables#externalDataConfiguration.csvOptions.encoding
:param src_fmt_configs: configure optional fields specific to the source format
:param labels: A dictionary containing labels for the BiqQuery table.
:param description: A string containing the description for the BigQuery table.
:param encryption_configuration: [Optional] Custom encryption configuration (e.g., Cloud KMS keys).
**Example**: ::
encryption_configuration = {
"kmsKeyName": "projects/testp/locations/us/keyRings/test-kr/cryptoKeys/test-key"
}
"""
warnings.warn(
"This method is deprecated. Please use `BigQueryHook.create_empty_table` method with "
"passing the `table_resource` object. This gives more flexibility than this method.",
DeprecationWarning,
)
location = location or self.location
src_fmt_configs = src_fmt_configs or {}
source_format = source_format.upper()
compression = compression.upper()
external_config_api_repr = {
'autodetect': autodetect,
'sourceFormat': source_format,
'sourceUris': source_uris,
'compression': compression,
'ignoreUnknownValues': ignore_unknown_values,
}
# if following fields are not specified in src_fmt_configs,
# honor the top-level params for backward-compatibility
backward_compatibility_configs = {
'skipLeadingRows': skip_leading_rows,
'fieldDelimiter': field_delimiter,
'quote': quote_character,
'allowQuotedNewlines': allow_quoted_newlines,
'allowJaggedRows': allow_jagged_rows,
'encoding': encoding,
}
src_fmt_to_param_mapping = {'CSV': 'csvOptions', 'GOOGLE_SHEETS': 'googleSheetsOptions'}
src_fmt_to_configs_mapping = {
'csvOptions': [
'allowJaggedRows',
'allowQuotedNewlines',
'fieldDelimiter',
'skipLeadingRows',
'quote',
'encoding',
],
'googleSheetsOptions': ['skipLeadingRows'],
}
if source_format in src_fmt_to_param_mapping.keys():
valid_configs = src_fmt_to_configs_mapping[src_fmt_to_param_mapping[source_format]]
src_fmt_configs = _validate_src_fmt_configs(
source_format, src_fmt_configs, valid_configs, backward_compatibility_configs
)
external_config_api_repr[src_fmt_to_param_mapping[source_format]] = src_fmt_configs
# build external config
external_config = ExternalConfig.from_api_repr(external_config_api_repr)
if schema_fields:
external_config.schema = [SchemaField.from_api_repr(f) for f in schema_fields]
if max_bad_records:
external_config.max_bad_records = max_bad_records
# build table definition
table = Table(table_ref=TableReference.from_string(external_project_dataset_table, project_id))
table.external_data_configuration = external_config
if labels:
table.labels = labels
if description:
table.description = description
if encryption_configuration:
table.encryption_configuration = EncryptionConfiguration.from_api_repr(encryption_configuration)
self.log.info('Creating external table: %s', external_project_dataset_table)
table_object = self.create_empty_table(
table_resource=table.to_api_repr(), project_id=project_id, location=location, exists_ok=True
)
self.log.info('External table created successfully: %s', external_project_dataset_table)
return table_object
@GoogleBaseHook.fallback_to_default_project_id
[docs] def update_table(
self,
table_resource: Dict[str, Any],
fields: Optional[List[str]] = None,
dataset_id: Optional[str] = None,
table_id: Optional[str] = None,
project_id: Optional[str] = None,
) -> Dict[str, Any]:
"""
Change some fields of a table.
Use ``fields`` to specify which fields to update. At least one field
must be provided. If a field is listed in ``fields`` and is ``None``
in ``table``, the field value will be deleted.
If ``table.etag`` is not ``None``, the update will only succeed if
the table on the server has the same ETag. Thus reading a table with
``get_table``, changing its fields, and then passing it to
``update_table`` will ensure that the changes will only be saved if
no modifications to the table occurred since the read.
:param project_id: The project to create the table into.
:param dataset_id: The dataset to create the table into.
:param table_id: The Name of the table to be created.
:param table_resource: Table resource as described in documentation:
https://cloud.google.com/bigquery/docs/reference/rest/v2/tables#Table
The table has to contain ``tableReference`` or ``project_id``, ``dataset_id`` and ``table_id``
have to be provided.
:param fields: The fields of ``table`` to change, spelled as the Table
properties (e.g. "friendly_name").
"""
fields = fields or list(table_resource.keys())
table_resource = self._resolve_table_reference(
table_resource=table_resource, project_id=project_id, dataset_id=dataset_id, table_id=table_id
)
table = Table.from_api_repr(table_resource)
self.log.info('Updating table: %s', table_resource["tableReference"])
table_object = self.get_client(project_id=project_id).update_table(table=table, fields=fields)
self.log.info('Table %s.%s.%s updated successfully', project_id, dataset_id, table_id)
return table_object.to_api_repr()
@GoogleBaseHook.fallback_to_default_project_id
[docs] def patch_table(
self,
dataset_id: str,
table_id: str,
project_id: Optional[str] = None,
description: Optional[str] = None,
expiration_time: Optional[int] = None,
external_data_configuration: Optional[Dict] = None,
friendly_name: Optional[str] = None,
labels: Optional[Dict] = None,
schema: Optional[List] = None,
time_partitioning: Optional[Dict] = None,
view: Optional[Dict] = None,
require_partition_filter: Optional[bool] = None,
encryption_configuration: Optional[Dict] = None,
) -> None:
"""
Patch information in an existing table.
It only updates fields that are provided in the request object.
Reference: https://cloud.google.com/bigquery/docs/reference/rest/v2/tables/patch
:param dataset_id: The dataset containing the table to be patched.
:param table_id: The Name of the table to be patched.
:param project_id: The project containing the table to be patched.
:param description: [Optional] A user-friendly description of this table.
:param expiration_time: [Optional] The time when this table expires,
in milliseconds since the epoch.
:param external_data_configuration: [Optional] A dictionary containing
properties of a table stored outside of BigQuery.
:param friendly_name: [Optional] A descriptive name for this table.
:param labels: [Optional] A dictionary containing labels associated with this table.
:param schema: [Optional] If set, the schema field list as defined here:
https://cloud.google.com/bigquery/docs/reference/rest/v2/jobs#configuration.load.schema
The supported schema modifications and unsupported schema modification are listed here:
https://cloud.google.com/bigquery/docs/managing-table-schemas
**Example**: ::
schema=[{"name": "emp_name", "type": "STRING", "mode": "REQUIRED"},
{"name": "salary", "type": "INTEGER", "mode": "NULLABLE"}]
:param time_partitioning: [Optional] A dictionary containing time-based partitioning
definition for the table.
:param view: [Optional] A dictionary containing definition for the view.
If set, it will patch a view instead of a table:
https://cloud.google.com/bigquery/docs/reference/rest/v2/tables#ViewDefinition
**Example**: ::
view = {
"query": "SELECT * FROM `test-project-id.test_dataset_id.test_table_prefix*` LIMIT 500",
"useLegacySql": False
}
:param require_partition_filter: [Optional] If true, queries over the this table require a
partition filter. If false, queries over the table
:param encryption_configuration: [Optional] Custom encryption configuration (e.g., Cloud KMS keys).
**Example**: ::
encryption_configuration = {
"kmsKeyName": "projects/testp/locations/us/keyRings/test-kr/cryptoKeys/test-key"
}
"""
warnings.warn(
"This method is deprecated, please use ``BigQueryHook.update_table`` method.",
DeprecationWarning,
)
table_resource: Dict[str, Any] = {}
if description is not None:
table_resource['description'] = description
if expiration_time is not None:
table_resource['expirationTime'] = expiration_time
if external_data_configuration:
table_resource['externalDataConfiguration'] = external_data_configuration
if friendly_name is not None:
table_resource['friendlyName'] = friendly_name
if labels:
table_resource['labels'] = labels
if schema:
table_resource['schema'] = {'fields': schema}
if time_partitioning:
table_resource['timePartitioning'] = time_partitioning
if view:
table_resource['view'] = view
if require_partition_filter is not None:
table_resource['requirePartitionFilter'] = require_partition_filter
if encryption_configuration:
table_resource["encryptionConfiguration"] = encryption_configuration
self.update_table(
table_resource=table_resource,
fields=list(table_resource.keys()),
project_id=project_id,
dataset_id=dataset_id,
table_id=table_id,
)
@GoogleBaseHook.fallback_to_default_project_id
[docs] def insert_all(
self,
project_id: str,
dataset_id: str,
table_id: str,
rows: List,
ignore_unknown_values: bool = False,
skip_invalid_rows: bool = False,
fail_on_error: bool = False,
) -> None:
"""
Method to stream data into BigQuery one record at a time without needing
to run a load job
.. seealso::
For more information, see:
https://cloud.google.com/bigquery/docs/reference/rest/v2/tabledata/insertAll
:param project_id: The name of the project where we have the table
:param dataset_id: The name of the dataset where we have the table
:param table_id: The name of the table
:param rows: the rows to insert
**Example or rows**:
rows=[{"json": {"a_key": "a_value_0"}}, {"json": {"a_key": "a_value_1"}}]
:param ignore_unknown_values: [Optional] Accept rows that contain values
that do not match the schema. The unknown values are ignored.
The default value is false, which treats unknown values as errors.
:param skip_invalid_rows: [Optional] Insert all valid rows of a request,
even if invalid rows exist. The default value is false, which causes
the entire request to fail if any invalid rows exist.
:param fail_on_error: [Optional] Force the task to fail if any errors occur.
The default value is false, which indicates the task should not fail
even if any insertion errors occur.
"""
self.log.info('Inserting %s row(s) into table %s:%s.%s', len(rows), project_id, dataset_id, table_id)
table_ref = TableReference(dataset_ref=DatasetReference(project_id, dataset_id), table_id=table_id)
bq_client = self.get_client(project_id=project_id)
table = bq_client.get_table(table_ref)
errors = bq_client.insert_rows(
table=table,
rows=rows,
ignore_unknown_values=ignore_unknown_values,
skip_invalid_rows=skip_invalid_rows,
)
if errors:
error_msg = f"{len(errors)} insert error(s) occurred. Details: {errors}"
self.log.error(error_msg)
if fail_on_error:
raise AirflowException(f'BigQuery job failed. Error was: {error_msg}')
else:
self.log.info('All row(s) inserted successfully: %s:%s.%s', project_id, dataset_id, table_id)
@GoogleBaseHook.fallback_to_default_project_id
[docs] def update_dataset(
self,
fields: Sequence[str],
dataset_resource: Dict[str, Any],
dataset_id: Optional[str] = None,
project_id: Optional[str] = None,
retry: Retry = DEFAULT_RETRY,
) -> Dataset:
"""
Change some fields of a dataset.
Use ``fields`` to specify which fields to update. At least one field
must be provided. If a field is listed in ``fields`` and is ``None`` in
``dataset``, it will be deleted.
If ``dataset.etag`` is not ``None``, the update will only
succeed if the dataset on the server has the same ETag. Thus
reading a dataset with ``get_dataset``, changing its fields,
and then passing it to ``update_dataset`` will ensure that the changes
will only be saved if no modifications to the dataset occurred
since the read.
:param dataset_resource: Dataset resource that will be provided
in request body.
https://cloud.google.com/bigquery/docs/reference/rest/v2/datasets#resource
:param dataset_id: The id of the dataset.
:param fields: The properties of ``dataset`` to change (e.g. "friendly_name").
:param project_id: The Google Cloud Project ID
:param retry: How to retry the RPC.
"""
dataset_resource["datasetReference"] = dataset_resource.get("datasetReference", {})
for key, value in zip(["datasetId", "projectId"], [dataset_id, project_id]):
spec_value = dataset_resource["datasetReference"].get(key)
if value and not spec_value:
dataset_resource["datasetReference"][key] = value
self.log.info('Start updating dataset')
dataset = self.get_client(project_id=project_id).update_dataset(
dataset=Dataset.from_api_repr(dataset_resource),
fields=fields,
retry=retry,
)
self.log.info("Dataset successfully updated: %s", dataset)
return dataset
[docs] def patch_dataset(
self, dataset_id: str, dataset_resource: Dict, project_id: Optional[str] = None
) -> Dict:
"""
Patches information in an existing dataset.
It only replaces fields that are provided in the submitted dataset resource.
More info:
https://cloud.google.com/bigquery/docs/reference/rest/v2/datasets/patch
:param dataset_id: The BigQuery Dataset ID
:param dataset_resource: Dataset resource that will be provided
in request body.
https://cloud.google.com/bigquery/docs/reference/rest/v2/datasets#resource
:param project_id: The Google Cloud Project ID
:rtype: dataset
https://cloud.google.com/bigquery/docs/reference/rest/v2/datasets#resource
"""
warnings.warn("This method is deprecated. Please use ``update_dataset``.", DeprecationWarning)
project_id = project_id or self.project_id
if not dataset_id or not isinstance(dataset_id, str):
raise ValueError(
f"dataset_id argument must be provided and has a type 'str'. You provided: {dataset_id}"
)
service = self.get_service()
dataset_project_id = project_id or self.project_id
self.log.info('Start patching dataset: %s:%s', dataset_project_id, dataset_id)
dataset = (
service.datasets()
.patch(
datasetId=dataset_id,
projectId=dataset_project_id,
body=dataset_resource,
)
.execute(num_retries=self.num_retries)
)
self.log.info("Dataset successfully patched: %s", dataset)
return dataset
[docs] def get_dataset_tables_list(
self,
dataset_id: str,
project_id: Optional[str] = None,
table_prefix: Optional[str] = None,
max_results: Optional[int] = None,
) -> List[Dict[str, Any]]:
"""
Method returns tables list of a BigQuery tables. If table prefix is specified,
only tables beginning by it are returned.
For more information, see:
https://cloud.google.com/bigquery/docs/reference/rest/v2/tables/list
:param dataset_id: The BigQuery Dataset ID
:param project_id: The Google Cloud Project ID
:param table_prefix: Tables must begin by this prefix to be returned (case sensitive)
:param max_results: The maximum number of results to return in a single response page.
Leverage the page tokens to iterate through the entire collection.
:return: List of tables associated with the dataset
"""
warnings.warn("This method is deprecated. Please use ``get_dataset_tables``.", DeprecationWarning)
project_id = project_id or self.project_id
tables = self.get_client().list_tables(
dataset=DatasetReference(project=project_id, dataset_id=dataset_id),
max_results=max_results,
)
if table_prefix:
result = [t.reference.to_api_repr() for t in tables if t.table_id.startswith(table_prefix)]
else:
result = [t.reference.to_api_repr() for t in tables]
self.log.info("%s tables found", len(result))
return result
@GoogleBaseHook.fallback_to_default_project_id
[docs] def get_datasets_list(
self,
project_id: Optional[str] = None,
include_all: bool = False,
filter_: Optional[str] = None,
max_results: Optional[int] = None,
page_token: Optional[str] = None,
retry: Retry = DEFAULT_RETRY,
) -> List[DatasetListItem]:
"""
Method returns full list of BigQuery datasets in the current project
For more information, see:
https://cloud.google.com/bigquery/docs/reference/rest/v2/datasets/list
:param project_id: Google Cloud Project for which you try to get all datasets
:param include_all: True if results include hidden datasets. Defaults to False.
:param filter_: An expression for filtering the results by label. For syntax, see
https://cloud.google.com/bigquery/docs/reference/rest/v2/datasets/list#filter.
:param filter_: str
:param max_results: Maximum number of datasets to return.
:param max_results: int
:param page_token: Token representing a cursor into the datasets. If not passed,
the API will return the first page of datasets. The token marks the beginning of the
iterator to be returned and the value of the ``page_token`` can be accessed at
``next_page_token`` of the :class:`~google.api_core.page_iterator.HTTPIterator`.
:param page_token: str
:param retry: How to retry the RPC.
"""
datasets = self.get_client(project_id=project_id).list_datasets(
project=project_id,
include_all=include_all,
filter=filter_,
max_results=max_results,
page_token=page_token,
retry=retry,
)
datasets_list = list(datasets)
self.log.info("Datasets List: %s", len(datasets_list))
return datasets_list
@GoogleBaseHook.fallback_to_default_project_id
[docs] def get_dataset(self, dataset_id: str, project_id: Optional[str] = None) -> Dataset:
"""
Fetch the dataset referenced by dataset_id.
:param dataset_id: The BigQuery Dataset ID
:param project_id: The Google Cloud Project ID
:return: dataset_resource
.. seealso::
For more information, see Dataset Resource content:
https://cloud.google.com/bigquery/docs/reference/rest/v2/datasets#resource
"""
dataset = self.get_client(project_id=project_id).get_dataset(
dataset_ref=DatasetReference(project_id, dataset_id)
)
self.log.info("Dataset Resource: %s", dataset)
return dataset
@GoogleBaseHook.fallback_to_default_project_id
[docs] def run_grant_dataset_view_access(
self,
source_dataset: str,
view_dataset: str,
view_table: str,
view_project: Optional[str] = None,
project_id: Optional[str] = None,
) -> Dict[str, Any]:
"""
Grant authorized view access of a dataset to a view table.
If this view has already been granted access to the dataset, do nothing.
This method is not atomic. Running it may clobber a simultaneous update.
:param source_dataset: the source dataset
:param view_dataset: the dataset that the view is in
:param view_table: the table of the view
:param project_id: the project of the source dataset. If None,
self.project_id will be used.
:param view_project: the project that the view is in. If None,
self.project_id will be used.
:return: the datasets resource of the source dataset.
"""
view_project = view_project or project_id
view_access = AccessEntry(
role=None,
entity_type="view",
entity_id={'projectId': view_project, 'datasetId': view_dataset, 'tableId': view_table},
)
dataset = self.get_dataset(project_id=project_id, dataset_id=source_dataset)
# Check to see if the view we want to add already exists.
if view_access not in dataset.access_entries:
self.log.info(
'Granting table %s:%s.%s authorized view access to %s:%s dataset.',
view_project,
view_dataset,
view_table,
project_id,
source_dataset,
)
dataset.access_entries += [view_access]
dataset = self.update_dataset(
fields=["access"], dataset_resource=dataset.to_api_repr(), project_id=project_id
)
else:
self.log.info(
'Table %s:%s.%s already has authorized view access to %s:%s dataset.',
view_project,
view_dataset,
view_table,
project_id,
source_dataset,
)
return dataset.to_api_repr()
@GoogleBaseHook.fallback_to_default_project_id
[docs] def run_table_upsert(
self, dataset_id: str, table_resource: Dict[str, Any], project_id: Optional[str] = None
) -> Dict[str, Any]:
"""
If the table already exists, update the existing table if not create new.
Since BigQuery does not natively allow table upserts, this is not an
atomic operation.
:param dataset_id: the dataset to upsert the table into.
:param table_resource: a table resource. see
https://cloud.google.com/bigquery/docs/reference/v2/tables#resource
:param project_id: the project to upsert the table into. If None,
project will be self.project_id.
:return:
"""
table_id = table_resource['tableReference']['tableId']
table_resource = self._resolve_table_reference(
table_resource=table_resource, project_id=project_id, dataset_id=dataset_id, table_id=table_id
)
tables_list_resp = self.get_dataset_tables(dataset_id=dataset_id, project_id=project_id)
if any(table['tableId'] == table_id for table in tables_list_resp):
self.log.info('Table %s:%s.%s exists, updating.', project_id, dataset_id, table_id)
table = self.update_table(table_resource=table_resource)
else:
self.log.info('Table %s:%s.%s does not exist. creating.', project_id, dataset_id, table_id)
table = self.create_empty_table(
table_resource=table_resource, project_id=project_id
).to_api_repr()
return table
[docs] def run_table_delete(self, deletion_dataset_table: str, ignore_if_missing: bool = False) -> None:
"""
Delete an existing table from the dataset;
If the table does not exist, return an error unless ignore_if_missing
is set to True.
:param deletion_dataset_table: A dotted
``(<project>.|<project>:)<dataset>.<table>`` that indicates which table
will be deleted.
:param ignore_if_missing: if True, then return success even if the
requested table does not exist.
:return:
"""
warnings.warn("This method is deprecated. Please use `delete_table`.", DeprecationWarning)
return self.delete_table(table_id=deletion_dataset_table, not_found_ok=ignore_if_missing)
@GoogleBaseHook.fallback_to_default_project_id
[docs] def delete_table(
self,
table_id: str,
not_found_ok: bool = True,
project_id: Optional[str] = None,
) -> None:
"""
Delete an existing table from the dataset. If the table does not exist, return an error
unless not_found_ok is set to True.
:param table_id: A dotted ``(<project>.|<project>:)<dataset>.<table>``
that indicates which table will be deleted.
:param not_found_ok: if True, then return success even if the
requested table does not exist.
:param project_id: the project used to perform the request
"""
self.get_client(project_id=project_id).delete_table(
table=table_id,
not_found_ok=not_found_ok,
)
self.log.info('Deleted table %s', table_id)
[docs] def get_tabledata(
self,
dataset_id: str,
table_id: str,
max_results: Optional[int] = None,
selected_fields: Optional[str] = None,
page_token: Optional[str] = None,
start_index: Optional[int] = None,
) -> List[Dict]:
"""
Get the data of a given dataset.table and optionally with selected columns.
see https://cloud.google.com/bigquery/docs/reference/v2/tabledata/list
:param dataset_id: the dataset ID of the requested table.
:param table_id: the table ID of the requested table.
:param max_results: the maximum results to return.
:param selected_fields: List of fields to return (comma-separated). If
unspecified, all fields are returned.
:param page_token: page token, returned from a previous call,
identifying the result set.
:param start_index: zero based index of the starting row to read.
:return: list of rows
"""
warnings.warn("This method is deprecated. Please use `list_rows`.", DeprecationWarning)
rows = self.list_rows(
dataset_id=dataset_id,
table_id=table_id,
max_results=max_results,
selected_fields=selected_fields,
page_token=page_token,
start_index=start_index,
)
return [dict(r) for r in rows]
@GoogleBaseHook.fallback_to_default_project_id
[docs] def list_rows(
self,
dataset_id: str,
table_id: str,
max_results: Optional[int] = None,
selected_fields: Optional[Union[List[str], str]] = None,
page_token: Optional[str] = None,
start_index: Optional[int] = None,
project_id: Optional[str] = None,
location: Optional[str] = None,
) -> List[Row]:
"""
List the rows of the table.
See https://cloud.google.com/bigquery/docs/reference/rest/v2/tabledata/list
:param dataset_id: the dataset ID of the requested table.
:param table_id: the table ID of the requested table.
:param max_results: the maximum results to return.
:param selected_fields: List of fields to return (comma-separated). If
unspecified, all fields are returned.
:param page_token: page token, returned from a previous call,
identifying the result set.
:param start_index: zero based index of the starting row to read.
:param project_id: Project ID for the project which the client acts on behalf of.
:param location: Default location for job.
:return: list of rows
"""
location = location or self.location
if isinstance(selected_fields, str):
selected_fields = selected_fields.split(",")
if selected_fields:
selected_fields = [SchemaField(n, "") for n in selected_fields]
else:
selected_fields = None
table = self._resolve_table_reference(
table_resource={},
project_id=project_id,
dataset_id=dataset_id,
table_id=table_id,
)
result = self.get_client(project_id=project_id, location=location).list_rows(
table=Table.from_api_repr(table),
selected_fields=selected_fields,
max_results=max_results,
page_token=page_token,
start_index=start_index,
)
return list(result)
@GoogleBaseHook.fallback_to_default_project_id
[docs] def get_schema(self, dataset_id: str, table_id: str, project_id: Optional[str] = None) -> dict:
"""
Get the schema for a given dataset and table.
see https://cloud.google.com/bigquery/docs/reference/v2/tables#resource
:param dataset_id: the dataset ID of the requested table
:param table_id: the table ID of the requested table
:param project_id: the optional project ID of the requested table.
If not provided, the connector's configured project will be used.
:return: a table schema
"""
table_ref = TableReference(dataset_ref=DatasetReference(project_id, dataset_id), table_id=table_id)
table = self.get_client(project_id=project_id).get_table(table_ref)
return {"fields": [s.to_api_repr() for s in table.schema]}
@GoogleBaseHook.fallback_to_default_project_id
[docs] def update_table_schema(
self,
schema_fields_updates: List[Dict[str, Any]],
include_policy_tags: bool,
dataset_id: str,
table_id: str,
project_id: Optional[str] = None,
) -> Dict[str, Any]:
"""
Update fields within a schema for a given dataset and table. Note that
some fields in schemas are immutable and trying to change them will cause
an exception.
If a new field is included it will be inserted which requires all required fields to be set.
See https://cloud.google.com/bigquery/docs/reference/rest/v2/tables#TableSchema
:param include_policy_tags: If set to True policy tags will be included in
the update request which requires special permissions even if unchanged
see https://cloud.google.com/bigquery/docs/column-level-security#roles
:param dataset_id: the dataset ID of the requested table to be updated
:param table_id: the table ID of the table to be updated
:param schema_fields_updates: a partial schema resource. see
https://cloud.google.com/bigquery/docs/reference/rest/v2/tables#TableSchema
**Example**: ::
schema_fields_updates=[
{"name": "emp_name", "description": "Some New Description"},
{"name": "salary", "description": "Some New Description"},
{"name": "departments", "fields": [
{"name": "name", "description": "Some New Description"},
{"name": "type", "description": "Some New Description"}
]},
]
:param project_id: The name of the project where we want to update the table.
"""
def _build_new_schema(
current_schema: List[Dict[str, Any]], schema_fields_updates: List[Dict[str, Any]]
) -> List[Dict[str, Any]]:
# Turn schema_field_updates into a dict keyed on field names
schema_fields_updates_dict = {field["name"]: field for field in deepcopy(schema_fields_updates)}
# Create a new dict for storing the new schema, initiated based on the current_schema
# as of Python 3.6, dicts retain order.
new_schema = {field["name"]: field for field in deepcopy(current_schema)}
# Each item in schema_fields_updates contains a potential patch
# to a schema field, iterate over them
for field_name, patched_value in schema_fields_updates_dict.items():
# If this field already exists, update it
if field_name in new_schema:
# If this field is of type RECORD and has a fields key we need to patch it recursively
if "fields" in patched_value:
patched_value["fields"] = _build_new_schema(
new_schema[field_name]["fields"], patched_value["fields"]
)
# Update the new_schema with the patched value
new_schema[field_name].update(patched_value)
# This is a new field, just include the whole configuration for it
else:
new_schema[field_name] = patched_value
return list(new_schema.values())
def _remove_policy_tags(schema: List[Dict[str, Any]]):
for field in schema:
if "policyTags" in field:
del field["policyTags"]
if "fields" in field:
_remove_policy_tags(field["fields"])
current_table_schema = self.get_schema(
dataset_id=dataset_id, table_id=table_id, project_id=project_id
)["fields"]
new_schema = _build_new_schema(current_table_schema, schema_fields_updates)
if not include_policy_tags:
_remove_policy_tags(new_schema)
table = self.update_table(
table_resource={"schema": {"fields": new_schema}},
fields=["schema"],
project_id=project_id,
dataset_id=dataset_id,
table_id=table_id,
)
return table
@GoogleBaseHook.fallback_to_default_project_id
[docs] def poll_job_complete(
self,
job_id: str,
project_id: Optional[str] = None,
location: Optional[str] = None,
retry: Retry = DEFAULT_RETRY,
) -> bool:
"""
Check if jobs completed.
:param job_id: id of the job.
:param project_id: Google Cloud Project where the job is running
:param location: location the job is running
:param retry: How to retry the RPC.
:rtype: bool
"""
location = location or self.location
job = self.get_client(project_id=project_id, location=location).get_job(job_id=job_id)
return job.done(retry=retry)
[docs] def cancel_query(self) -> None:
"""Cancel all started queries that have not yet completed"""
warnings.warn(
"This method is deprecated. Please use `BigQueryHook.cancel_job`.",
DeprecationWarning,
)
if self.running_job_id:
self.cancel_job(job_id=self.running_job_id)
else:
self.log.info('No running BigQuery jobs to cancel.')
@GoogleBaseHook.fallback_to_default_project_id
[docs] def cancel_job(
self,
job_id: str,
project_id: Optional[str] = None,
location: Optional[str] = None,
) -> None:
"""
Cancel a job and wait for cancellation to complete
:param job_id: id of the job.
:param project_id: Google Cloud Project where the job is running
:param location: location the job is running
"""
location = location or self.location
if self.poll_job_complete(job_id=job_id):
self.log.info('No running BigQuery jobs to cancel.')
return
self.log.info('Attempting to cancel job : %s, %s', project_id, job_id)
self.get_client(location=location, project_id=project_id).cancel_job(job_id=job_id)
# Wait for all the calls to cancel to finish
max_polling_attempts = 12
polling_attempts = 0
job_complete = False
while polling_attempts < max_polling_attempts and not job_complete:
polling_attempts += 1
job_complete = self.poll_job_complete(job_id)
if job_complete:
self.log.info('Job successfully canceled: %s, %s', project_id, job_id)
elif polling_attempts == max_polling_attempts:
self.log.info(
"Stopping polling due to timeout. Job with id %s "
"has not completed cancel and may or may not finish.",
job_id,
)
else:
self.log.info('Waiting for canceled job with id %s to finish.', job_id)
time.sleep(5)
@GoogleBaseHook.fallback_to_default_project_id
[docs] def get_job(
self,
job_id: Optional[str] = None,
project_id: Optional[str] = None,
location: Optional[str] = None,
) -> Union[CopyJob, QueryJob, LoadJob, ExtractJob]:
"""
Retrieves a BigQuery job. For more information see:
https://cloud.google.com/bigquery/docs/reference/v2/jobs
:param job_id: The ID of the job. The ID must contain only letters (a-z, A-Z),
numbers (0-9), underscores (_), or dashes (-). The maximum length is 1,024
characters. If not provided then uuid will be generated.
:param project_id: Google Cloud Project where the job is running
:param location: location the job is running
"""
client = self.get_client(project_id=project_id, location=location)
job = client.get_job(job_id=job_id, project=project_id, location=location)
return job
@staticmethod
def _custom_job_id(configuration: Dict[str, Any]) -> str:
hash_base = json.dumps(configuration, sort_keys=True)
uniqueness_suffix = hashlib.md5(hash_base.encode()).hexdigest()
microseconds_from_epoch = int(
(datetime.now() - datetime.fromtimestamp(0)) / timedelta(microseconds=1)
)
return f"airflow_{microseconds_from_epoch}_{uniqueness_suffix}"
@GoogleBaseHook.fallback_to_default_project_id
[docs] def insert_job(
self,
configuration: Dict,
job_id: Optional[str] = None,
project_id: Optional[str] = None,
location: Optional[str] = None,
nowait: bool = False,
retry: Retry = DEFAULT_RETRY,
timeout: Optional[float] = None,
) -> BigQueryJob:
"""
Executes a BigQuery job. Waits for the job to complete and returns job id.
See here:
https://cloud.google.com/bigquery/docs/reference/v2/jobs
:param configuration: The configuration parameter maps directly to
BigQuery's configuration field in the job object. See
https://cloud.google.com/bigquery/docs/reference/v2/jobs for
details.
:param job_id: The ID of the job. The ID must contain only letters (a-z, A-Z),
numbers (0-9), underscores (_), or dashes (-). The maximum length is 1,024
characters. If not provided then uuid will be generated.
:param project_id: Google Cloud Project where the job is running
:param location: location the job is running
:param nowait: specify whether to insert job without waiting for the result
:param retry: How to retry the RPC.
:param timeout: The number of seconds to wait for the underlying HTTP transport
before using ``retry``.
"""
location = location or self.location
job_id = job_id or self._custom_job_id(configuration)
client = self.get_client(project_id=project_id, location=location)
job_data = {
"configuration": configuration,
"jobReference": {"jobId": job_id, "projectId": project_id, "location": location},
}
supported_jobs = {
LoadJob._JOB_TYPE: LoadJob,
CopyJob._JOB_TYPE: CopyJob,
ExtractJob._JOB_TYPE: ExtractJob,
QueryJob._JOB_TYPE: QueryJob,
}
job = None
for job_type, job_object in supported_jobs.items():
if job_type in configuration:
job = job_object
break
if not job:
raise AirflowException(f"Unknown job type. Supported types: {supported_jobs.keys()}")
job = job.from_api_repr(job_data, client)
self.log.info("Inserting job %s", job.job_id)
if nowait:
# Initiate the job and don't wait for it to complete.
job._begin()
else:
# Start the job and wait for it to complete and get the result.
job.result(timeout=timeout, retry=retry)
return job
[docs] def run_with_configuration(self, configuration: dict) -> str:
"""
Executes a BigQuery SQL query. See here:
https://cloud.google.com/bigquery/docs/reference/v2/jobs
For more details about the configuration parameter.
:param configuration: The configuration parameter maps directly to
BigQuery's configuration field in the job object. See
https://cloud.google.com/bigquery/docs/reference/v2/jobs for
details.
"""
warnings.warn("This method is deprecated. Please use `BigQueryHook.insert_job`", DeprecationWarning)
job = self.insert_job(configuration=configuration, project_id=self.project_id)
self.running_job_id = job.job_id
return job.job_id
[docs] def run_load(
self,
destination_project_dataset_table: str,
source_uris: List,
schema_fields: Optional[List] = None,
source_format: str = 'CSV',
create_disposition: str = 'CREATE_IF_NEEDED',
skip_leading_rows: int = 0,
write_disposition: str = 'WRITE_EMPTY',
field_delimiter: str = ',',
max_bad_records: int = 0,
quote_character: Optional[str] = None,
ignore_unknown_values: bool = False,
allow_quoted_newlines: bool = False,
allow_jagged_rows: bool = False,
encoding: str = "UTF-8",
schema_update_options: Optional[Iterable] = None,
src_fmt_configs: Optional[Dict] = None,
time_partitioning: Optional[Dict] = None,
cluster_fields: Optional[List] = None,
autodetect: bool = False,
encryption_configuration: Optional[Dict] = None,
labels: Optional[Dict] = None,
description: Optional[str] = None,
) -> str:
"""
Executes a BigQuery load command to load data from Google Cloud Storage
to BigQuery. See here:
https://cloud.google.com/bigquery/docs/reference/v2/jobs
For more details about these parameters.
:param destination_project_dataset_table:
The dotted ``(<project>.|<project>:)<dataset>.<table>($<partition>)`` BigQuery
table to load data into. If ``<project>`` is not included, project will be the
project defined in the connection json. If a partition is specified the
operator will automatically append the data, create a new partition or create
a new DAY partitioned table.
:param schema_fields: The schema field list as defined here:
https://cloud.google.com/bigquery/docs/reference/v2/jobs#configuration.load
Required if autodetect=False; optional if autodetect=True.
:param autodetect: Attempt to autodetect the schema for CSV and JSON
source files.
:param source_uris: The source Google Cloud
Storage URI (e.g. gs://some-bucket/some-file.txt). A single wild
per-object name can be used.
:param source_format: File format to export.
:param create_disposition: The create disposition if the table doesn't exist.
:param skip_leading_rows: Number of rows to skip when loading from a CSV.
:param write_disposition: The write disposition if the table already exists.
:param field_delimiter: The delimiter to use when loading from a CSV.
:param max_bad_records: The maximum number of bad records that BigQuery can
ignore when running the job.
:param quote_character: The value that is used to quote data sections in a CSV
file.
:param ignore_unknown_values: [Optional] Indicates if BigQuery should allow
extra values that are not represented in the table schema.
If true, the extra values are ignored. If false, records with extra columns
are treated as bad records, and if there are too many bad records, an
invalid error is returned in the job result.
:param allow_quoted_newlines: Whether to allow quoted newlines (true) or not
(false).
:param allow_jagged_rows: Accept rows that are missing trailing optional columns.
The missing values are treated as nulls. If false, records with missing
trailing columns are treated as bad records, and if there are too many bad
records, an invalid error is returned in the job result. Only applicable when
source_format is CSV.
:param encoding: The character encoding of the data.
.. seealso::
https://cloud.google.com/bigquery/docs/reference/rest/v2/tables#externalDataConfiguration.csvOptions.encoding
:param schema_update_options: Allows the schema of the destination
table to be updated as a side effect of the load job.
:param src_fmt_configs: configure optional fields specific to the source format
:param time_partitioning: configure optional time partitioning fields i.e.
partition by field, type and expiration as per API specifications.
:param cluster_fields: Request that the result of this load be stored sorted
by one or more columns. BigQuery supports clustering for both partitioned and
non-partitioned tables. The order of columns given determines the sort order.
:param encryption_configuration: [Optional] Custom encryption configuration (e.g., Cloud KMS keys).
**Example**: ::
encryption_configuration = {
"kmsKeyName": "projects/testp/locations/us/keyRings/test-kr/cryptoKeys/test-key"
}
:param labels: A dictionary containing labels for the BiqQuery table.
:param description: A string containing the description for the BigQuery table.
"""
warnings.warn(
"This method is deprecated. Please use `BigQueryHook.insert_job` method.", DeprecationWarning
)
if not self.project_id:
raise ValueError("The project_id should be set")
# To provide backward compatibility
schema_update_options = list(schema_update_options or [])
# bigquery only allows certain source formats
# we check to make sure the passed source format is valid
# if it's not, we raise a ValueError
# Refer to this link for more details:
# https://cloud.google.com/bigquery/docs/reference/rest/v2/jobs#configuration.query.tableDefinitions.(key).sourceFormat # noqa
if schema_fields is None and not autodetect:
raise ValueError('You must either pass a schema or autodetect=True.')
if src_fmt_configs is None:
src_fmt_configs = {}
source_format = source_format.upper()
allowed_formats = [
"CSV",
"NEWLINE_DELIMITED_JSON",
"AVRO",
"GOOGLE_SHEETS",
"DATASTORE_BACKUP",
"PARQUET",
]
if source_format not in allowed_formats:
raise ValueError(
f"{source_format} is not a valid source format. "
f"Please use one of the following types: {allowed_formats}."
)
# bigquery also allows you to define how you want a table's schema to change
# as a side effect of a load
# for more details:
# https://cloud.google.com/bigquery/docs/reference/rest/v2/jobs#configuration.load.schemaUpdateOptions
allowed_schema_update_options = ['ALLOW_FIELD_ADDITION', "ALLOW_FIELD_RELAXATION"]
if not set(allowed_schema_update_options).issuperset(set(schema_update_options)):
raise ValueError(
f"{schema_update_options} contains invalid schema update options. "
f"Please only use one or more of the following options: {allowed_schema_update_options}"
)
destination_project, destination_dataset, destination_table = self.split_tablename(
table_input=destination_project_dataset_table,
default_project_id=self.project_id,
var_name='destination_project_dataset_table',
)
configuration: Dict[str, Any] = {
'load': {
'autodetect': autodetect,
'createDisposition': create_disposition,
'destinationTable': {
'projectId': destination_project,
'datasetId': destination_dataset,
'tableId': destination_table,
},
'sourceFormat': source_format,
'sourceUris': source_uris,
'writeDisposition': write_disposition,
'ignoreUnknownValues': ignore_unknown_values,
}
}
time_partitioning = _cleanse_time_partitioning(destination_project_dataset_table, time_partitioning)
if time_partitioning:
configuration['load'].update({'timePartitioning': time_partitioning})
if cluster_fields:
configuration['load'].update({'clustering': {'fields': cluster_fields}})
if schema_fields:
configuration['load']['schema'] = {'fields': schema_fields}
if schema_update_options:
if write_disposition not in ["WRITE_APPEND", "WRITE_TRUNCATE"]:
raise ValueError(
"schema_update_options is only "
"allowed if write_disposition is "
"'WRITE_APPEND' or 'WRITE_TRUNCATE'."
)
else:
self.log.info("Adding experimental 'schemaUpdateOptions': %s", schema_update_options)
configuration['load']['schemaUpdateOptions'] = schema_update_options
if max_bad_records:
configuration['load']['maxBadRecords'] = max_bad_records
if encryption_configuration:
configuration["load"]["destinationEncryptionConfiguration"] = encryption_configuration
if labels or description:
configuration['load'].update({'destinationTableProperties': {}})
if labels:
configuration['load']['destinationTableProperties']['labels'] = labels
if description:
configuration['load']['destinationTableProperties']['description'] = description
src_fmt_to_configs_mapping = {
'CSV': [
'allowJaggedRows',
'allowQuotedNewlines',
'autodetect',
'fieldDelimiter',
'skipLeadingRows',
'ignoreUnknownValues',
'nullMarker',
'quote',
'encoding',
],
'DATASTORE_BACKUP': ['projectionFields'],
'NEWLINE_DELIMITED_JSON': ['autodetect', 'ignoreUnknownValues'],
'PARQUET': ['autodetect', 'ignoreUnknownValues'],
'AVRO': ['useAvroLogicalTypes'],
}
valid_configs = src_fmt_to_configs_mapping[source_format]
# if following fields are not specified in src_fmt_configs,
# honor the top-level params for backward-compatibility
backward_compatibility_configs = {
'skipLeadingRows': skip_leading_rows,
'fieldDelimiter': field_delimiter,
'ignoreUnknownValues': ignore_unknown_values,
'quote': quote_character,
'allowQuotedNewlines': allow_quoted_newlines,
'encoding': encoding,
}
src_fmt_configs = _validate_src_fmt_configs(
source_format, src_fmt_configs, valid_configs, backward_compatibility_configs
)
configuration['load'].update(src_fmt_configs)
if allow_jagged_rows:
configuration['load']['allowJaggedRows'] = allow_jagged_rows
job = self.insert_job(configuration=configuration, project_id=self.project_id)
self.running_job_id = job.job_id
return job.job_id
[docs] def run_copy(
self,
source_project_dataset_tables: Union[List, str],
destination_project_dataset_table: str,
write_disposition: str = 'WRITE_EMPTY',
create_disposition: str = 'CREATE_IF_NEEDED',
labels: Optional[Dict] = None,
encryption_configuration: Optional[Dict] = None,
) -> str:
"""
Executes a BigQuery copy command to copy data from one BigQuery table
to another. See here:
https://cloud.google.com/bigquery/docs/reference/v2/jobs#configuration.copy
For more details about these parameters.
:param source_project_dataset_tables: One or more dotted
``(project:|project.)<dataset>.<table>``
BigQuery tables to use as the source data. Use a list if there are
multiple source tables.
If ``<project>`` is not included, project will be the project defined
in the connection json.
:param destination_project_dataset_table: The destination BigQuery
table. Format is: ``(project:|project.)<dataset>.<table>``
:param write_disposition: The write disposition if the table already exists.
:param create_disposition: The create disposition if the table doesn't exist.
:param labels: a dictionary containing labels for the job/query,
passed to BigQuery
:param encryption_configuration: [Optional] Custom encryption configuration (e.g., Cloud KMS keys).
**Example**: ::
encryption_configuration = {
"kmsKeyName": "projects/testp/locations/us/keyRings/test-kr/cryptoKeys/test-key"
}
"""
warnings.warn(
"This method is deprecated. Please use `BigQueryHook.insert_job` method.", DeprecationWarning
)
if not self.project_id:
raise ValueError("The project_id should be set")
source_project_dataset_tables = (
[source_project_dataset_tables]
if not isinstance(source_project_dataset_tables, list)
else source_project_dataset_tables
)
source_project_dataset_tables_fixup = []
for source_project_dataset_table in source_project_dataset_tables:
source_project, source_dataset, source_table = self.split_tablename(
table_input=source_project_dataset_table,
default_project_id=self.project_id,
var_name='source_project_dataset_table',
)
source_project_dataset_tables_fixup.append(
{'projectId': source_project, 'datasetId': source_dataset, 'tableId': source_table}
)
destination_project, destination_dataset, destination_table = self.split_tablename(
table_input=destination_project_dataset_table, default_project_id=self.project_id
)
configuration = {
'copy': {
'createDisposition': create_disposition,
'writeDisposition': write_disposition,
'sourceTables': source_project_dataset_tables_fixup,
'destinationTable': {
'projectId': destination_project,
'datasetId': destination_dataset,
'tableId': destination_table,
},
}
}
if labels:
configuration['labels'] = labels
if encryption_configuration:
configuration["copy"]["destinationEncryptionConfiguration"] = encryption_configuration
job = self.insert_job(configuration=configuration, project_id=self.project_id)
self.running_job_id = job.job_id
return job.job_id
[docs] def run_query(
self,
sql: str,
destination_dataset_table: Optional[str] = None,
write_disposition: str = 'WRITE_EMPTY',
allow_large_results: bool = False,
flatten_results: Optional[bool] = None,
udf_config: Optional[List] = None,
use_legacy_sql: Optional[bool] = None,
maximum_billing_tier: Optional[int] = None,
maximum_bytes_billed: Optional[float] = None,
create_disposition: str = 'CREATE_IF_NEEDED',
query_params: Optional[List] = None,
labels: Optional[Dict] = None,
schema_update_options: Optional[Iterable] = None,
priority: str = 'INTERACTIVE',
time_partitioning: Optional[Dict] = None,
api_resource_configs: Optional[Dict] = None,
cluster_fields: Optional[List[str]] = None,
location: Optional[str] = None,
encryption_configuration: Optional[Dict] = None,
) -> str:
"""
Executes a BigQuery SQL query. Optionally persists results in a BigQuery
table. See here:
https://cloud.google.com/bigquery/docs/reference/v2/jobs
For more details about these parameters.
:param sql: The BigQuery SQL to execute.
:param destination_dataset_table: The dotted ``<dataset>.<table>``
BigQuery table to save the query results.
:param write_disposition: What to do if the table already exists in
BigQuery.
:param allow_large_results: Whether to allow large results.
:param flatten_results: If true and query uses legacy SQL dialect, flattens
all nested and repeated fields in the query results. ``allowLargeResults``
must be true if this is set to false. For standard SQL queries, this
flag is ignored and results are never flattened.
:param udf_config: The User Defined Function configuration for the query.
See https://cloud.google.com/bigquery/user-defined-functions for details.
:param use_legacy_sql: Whether to use legacy SQL (true) or standard SQL (false).
If `None`, defaults to `self.use_legacy_sql`.
:param api_resource_configs: a dictionary that contain params
'configuration' applied for Google BigQuery Jobs API:
https://cloud.google.com/bigquery/docs/reference/rest/v2/jobs
for example, {'query': {'useQueryCache': False}}. You could use it
if you need to provide some params that are not supported by the
BigQueryHook like args.
:param maximum_billing_tier: Positive integer that serves as a
multiplier of the basic price.
:param maximum_bytes_billed: Limits the bytes billed for this job.
Queries that will have bytes billed beyond this limit will fail
(without incurring a charge). If unspecified, this will be
set to your project default.
:param create_disposition: Specifies whether the job is allowed to
create new tables.
:param query_params: a list of dictionary containing query parameter types and
values, passed to BigQuery
:param labels: a dictionary containing labels for the job/query,
passed to BigQuery
:param schema_update_options: Allows the schema of the destination
table to be updated as a side effect of the query job.
:param priority: Specifies a priority for the query.
Possible values include INTERACTIVE and BATCH.
The default value is INTERACTIVE.
:param time_partitioning: configure optional time partitioning fields i.e.
partition by field, type and expiration as per API specifications.
:param cluster_fields: Request that the result of this query be stored sorted
by one or more columns. BigQuery supports clustering for both partitioned and
non-partitioned tables. The order of columns given determines the sort order.
:param location: The geographic location of the job. Required except for
US and EU. See details at
https://cloud.google.com/bigquery/docs/locations#specifying_your_location
:param encryption_configuration: [Optional] Custom encryption configuration (e.g., Cloud KMS keys).
**Example**: ::
encryption_configuration = {
"kmsKeyName": "projects/testp/locations/us/keyRings/test-kr/cryptoKeys/test-key"
}
"""
warnings.warn(
"This method is deprecated. Please use `BigQueryHook.insert_job` method.", DeprecationWarning
)
if not self.project_id:
raise ValueError("The project_id should be set")
labels = labels or self.labels
schema_update_options = list(schema_update_options or [])
if time_partitioning is None:
time_partitioning = {}
if location:
self.location = location
if not api_resource_configs:
api_resource_configs = self.api_resource_configs
else:
_validate_value('api_resource_configs', api_resource_configs, dict)
configuration = deepcopy(api_resource_configs)
if 'query' not in configuration:
configuration['query'] = {}
else:
_validate_value("api_resource_configs['query']", configuration['query'], dict)
if sql is None and not configuration['query'].get('query', None):
raise TypeError('`BigQueryBaseCursor.run_query` missing 1 required positional argument: `sql`')
# BigQuery also allows you to define how you want a table's schema to change
# as a side effect of a query job
# for more details:
# https://cloud.google.com/bigquery/docs/reference/rest/v2/jobs#configuration.query.schemaUpdateOptions # noqa
allowed_schema_update_options = ['ALLOW_FIELD_ADDITION', "ALLOW_FIELD_RELAXATION"]
if not set(allowed_schema_update_options).issuperset(set(schema_update_options)):
raise ValueError(
f"{schema_update_options} contains invalid schema update options."
f" Please only use one or more of the following options: {allowed_schema_update_options}"
)
if schema_update_options:
if write_disposition not in ["WRITE_APPEND", "WRITE_TRUNCATE"]:
raise ValueError(
"schema_update_options is only "
"allowed if write_disposition is "
"'WRITE_APPEND' or 'WRITE_TRUNCATE'."
)
if destination_dataset_table:
destination_project, destination_dataset, destination_table = self.split_tablename(
table_input=destination_dataset_table, default_project_id=self.project_id
)
destination_dataset_table = { # type: ignore
'projectId': destination_project,
'datasetId': destination_dataset,
'tableId': destination_table,
}
if cluster_fields:
cluster_fields = {'fields': cluster_fields} # type: ignore
query_param_list = [
(sql, 'query', None, (str,)),
(priority, 'priority', 'INTERACTIVE', (str,)),
(use_legacy_sql, 'useLegacySql', self.use_legacy_sql, bool),
(query_params, 'queryParameters', None, list),
(udf_config, 'userDefinedFunctionResources', None, list),
(maximum_billing_tier, 'maximumBillingTier', None, int),
(maximum_bytes_billed, 'maximumBytesBilled', None, float),
(time_partitioning, 'timePartitioning', {}, dict),
(schema_update_options, 'schemaUpdateOptions', None, list),
(destination_dataset_table, 'destinationTable', None, dict),
(cluster_fields, 'clustering', None, dict),
] # type: List[Tuple]
for param, param_name, param_default, param_type in query_param_list:
if param_name not in configuration['query'] and param in [None, {}, ()]:
if param_name == 'timePartitioning':
param_default = _cleanse_time_partitioning(destination_dataset_table, time_partitioning)
param = param_default
if param in [None, {}, ()]:
continue
_api_resource_configs_duplication_check(param_name, param, configuration['query'])
configuration['query'][param_name] = param
# check valid type of provided param,
# it last step because we can get param from 2 sources,
# and first of all need to find it
_validate_value(param_name, configuration['query'][param_name], param_type)
if param_name == 'schemaUpdateOptions' and param:
self.log.info("Adding experimental 'schemaUpdateOptions': %s", schema_update_options)
if param_name != 'destinationTable':
continue
for key in ['projectId', 'datasetId', 'tableId']:
if key not in configuration['query']['destinationTable']:
raise ValueError(
"Not correct 'destinationTable' in "
"api_resource_configs. 'destinationTable' "
"must be a dict with {'projectId':'', "
"'datasetId':'', 'tableId':''}"
)
configuration['query'].update(
{
'allowLargeResults': allow_large_results,
'flattenResults': flatten_results,
'writeDisposition': write_disposition,
'createDisposition': create_disposition,
}
)
if (
'useLegacySql' in configuration['query']
and configuration['query']['useLegacySql']
and 'queryParameters' in configuration['query']
):
raise ValueError("Query parameters are not allowed when using legacy SQL")
if labels:
_api_resource_configs_duplication_check('labels', labels, configuration)
configuration['labels'] = labels
if encryption_configuration:
configuration["query"]["destinationEncryptionConfiguration"] = encryption_configuration
job = self.insert_job(configuration=configuration, project_id=self.project_id)
self.running_job_id = job.job_id
return job.job_id
[docs] def generate_job_id(self, job_id, dag_id, task_id, logical_date, configuration, force_rerun=False):
if force_rerun:
hash_base = str(uuid.uuid4())
else:
hash_base = json.dumps(configuration, sort_keys=True)
uniqueness_suffix = hashlib.md5(hash_base.encode()).hexdigest()
if job_id:
return f"{job_id}_{uniqueness_suffix}"
exec_date = logical_date.isoformat()
job_id = f"airflow_{dag_id}_{task_id}_{exec_date}_{uniqueness_suffix}"
return re.sub(r"[:\-+.]", "_", job_id)
[docs] def split_tablename(
self, table_input: str, default_project_id: str, var_name: Optional[str] = None
) -> Tuple[str, str, str]:
if '.' not in table_input:
raise ValueError(f'Expected table name in the format of <dataset>.<table>. Got: {table_input}')
if not default_project_id:
raise ValueError("INTERNAL: No default project is specified")
def var_print(var_name):
if var_name is None:
return ""
else:
return f"Format exception for {var_name}: "
if table_input.count('.') + table_input.count(':') > 3:
raise Exception(f'{var_print(var_name)}Use either : or . to specify project got {table_input}')
cmpt = table_input.rsplit(':', 1)
project_id = None
rest = table_input
if len(cmpt) == 1:
project_id = None
rest = cmpt[0]
elif len(cmpt) == 2 and cmpt[0].count(':') <= 1:
if cmpt[-1].count('.') != 2:
project_id = cmpt[0]
rest = cmpt[1]
else:
raise Exception(
f'{var_print(var_name)}Expect format of (<project:)<dataset>.<table>, got {table_input}'
)
cmpt = rest.split('.')
if len(cmpt) == 3:
if project_id:
raise ValueError(f"{var_print(var_name)}Use either : or . to specify project")
project_id = cmpt[0]
dataset_id = cmpt[1]
table_id = cmpt[2]
elif len(cmpt) == 2:
dataset_id = cmpt[0]
table_id = cmpt[1]
else:
raise Exception(
f'{var_print(var_name)} Expect format of (<project.|<project:)<dataset>.<table>, '
f'got {table_input}'
)
if project_id is None:
if var_name is not None:
self.log.info(
'Project not included in %s: %s; using project "%s"',
var_name,
table_input,
default_project_id,
)
project_id = default_project_id
return project_id, dataset_id, table_id
[docs]class BigQueryConnection:
"""
BigQuery does not have a notion of a persistent connection. Thus, these
objects are small stateless factories for cursors, which do all the real
work.
"""
def __init__(self, *args, **kwargs) -> None:
self._args = args
self._kwargs = kwargs
[docs] def close(self) -> None:
"""The BigQueryConnection does not have anything to close"""
[docs] def commit(self) -> None:
"""The BigQueryConnection does not support transactions"""
[docs] def cursor(self) -> "BigQueryCursor":
"""Return a new :py:class:`Cursor` object using the connection"""
return BigQueryCursor(*self._args, **self._kwargs)
[docs] def rollback(self) -> NoReturn:
"""The BigQueryConnection does not have transactions"""
raise NotImplementedError("BigQueryConnection does not have transactions")
[docs]class BigQueryBaseCursor(LoggingMixin):
"""
The BigQuery base cursor contains helper methods to execute queries against
BigQuery. The methods can be used directly by operators, in cases where a
PEP 249 cursor isn't needed.
"""
def __init__(
self,
service: Any,
project_id: str,
hook: BigQueryHook,
use_legacy_sql: bool = True,
api_resource_configs: Optional[Dict] = None,
location: Optional[str] = None,
num_retries: int = 5,
labels: Optional[Dict] = None,
) -> None:
super().__init__()
self.service = service
self.project_id = project_id
self.use_legacy_sql = use_legacy_sql
if api_resource_configs:
_validate_value("api_resource_configs", api_resource_configs, dict)
self.api_resource_configs = api_resource_configs if api_resource_configs else {} # type Dict
self.running_job_id = None # type: Optional[str]
self.location = location
self.num_retries = num_retries
self.labels = labels
self.hook = hook
[docs] def create_empty_table(self, *args, **kwargs) -> None:
"""
This method is deprecated.
Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.create_empty_table`
"""
warnings.warn(
"This method is deprecated. "
"Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.create_empty_table`",
DeprecationWarning,
stacklevel=3,
)
return self.hook.create_empty_table(*args, **kwargs)
[docs] def create_empty_dataset(self, *args, **kwargs) -> Dict[str, Any]:
"""
This method is deprecated.
Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.create_empty_dataset`
"""
warnings.warn(
"This method is deprecated. "
"Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.create_empty_dataset`",
DeprecationWarning,
stacklevel=3,
)
return self.hook.create_empty_dataset(*args, **kwargs)
[docs] def get_dataset_tables(self, *args, **kwargs) -> List[Dict[str, Any]]:
"""
This method is deprecated.
Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.get_dataset_tables`
"""
warnings.warn(
"This method is deprecated. "
"Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.get_dataset_tables`",
DeprecationWarning,
stacklevel=3,
)
return self.hook.get_dataset_tables(*args, **kwargs)
[docs] def delete_dataset(self, *args, **kwargs) -> None:
"""
This method is deprecated.
Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.delete_dataset`
"""
warnings.warn(
"This method is deprecated. "
"Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.delete_dataset`",
DeprecationWarning,
stacklevel=3,
)
return self.hook.delete_dataset(*args, **kwargs)
[docs] def create_external_table(self, *args, **kwargs) -> None:
"""
This method is deprecated.
Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.create_external_table`
"""
warnings.warn(
"This method is deprecated. "
"Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.create_external_table`",
DeprecationWarning,
stacklevel=3,
)
return self.hook.create_external_table(*args, **kwargs)
[docs] def patch_table(self, *args, **kwargs) -> None:
"""
This method is deprecated.
Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.patch_table`
"""
warnings.warn(
"This method is deprecated. "
"Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.patch_table`",
DeprecationWarning,
stacklevel=3,
)
return self.hook.patch_table(*args, **kwargs)
[docs] def insert_all(self, *args, **kwargs) -> None:
"""
This method is deprecated.
Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.insert_all`
"""
warnings.warn(
"This method is deprecated. "
"Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.insert_all`",
DeprecationWarning,
stacklevel=3,
)
return self.hook.insert_all(*args, **kwargs)
[docs] def update_dataset(self, *args, **kwargs) -> Dict:
"""
This method is deprecated.
Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.update_dataset`
"""
warnings.warn(
"This method is deprecated. "
"Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.update_dataset`",
DeprecationWarning,
stacklevel=3,
)
return Dataset.to_api_repr(self.hook.update_dataset(*args, **kwargs))
[docs] def patch_dataset(self, *args, **kwargs) -> Dict:
"""
This method is deprecated.
Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.patch_dataset`
"""
warnings.warn(
"This method is deprecated. "
"Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.patch_dataset`",
DeprecationWarning,
stacklevel=3,
)
return self.hook.patch_dataset(*args, **kwargs)
[docs] def get_dataset_tables_list(self, *args, **kwargs) -> List[Dict[str, Any]]:
"""
This method is deprecated.
Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.get_dataset_tables_list`
"""
warnings.warn(
"This method is deprecated. "
"Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.get_dataset_tables_list`",
DeprecationWarning,
stacklevel=3,
)
return self.hook.get_dataset_tables_list(*args, **kwargs)
[docs] def get_datasets_list(self, *args, **kwargs) -> list:
"""
This method is deprecated.
Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.get_datasets_list`
"""
warnings.warn(
"This method is deprecated. "
"Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.get_datasets_list`",
DeprecationWarning,
stacklevel=3,
)
return self.hook.get_datasets_list(*args, **kwargs)
[docs] def get_dataset(self, *args, **kwargs) -> dict:
"""
This method is deprecated.
Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.get_dataset`
"""
warnings.warn(
"This method is deprecated. "
"Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.get_dataset`",
DeprecationWarning,
stacklevel=3,
)
return self.hook.get_dataset(*args, **kwargs)
[docs] def run_grant_dataset_view_access(self, *args, **kwargs) -> dict:
"""
This method is deprecated.
Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.run_grant_dataset_view_access`
"""
warnings.warn(
"This method is deprecated. "
"Please use `airflow.providers.google.cloud.hooks"
".bigquery.BigQueryHook.run_grant_dataset_view_access`",
DeprecationWarning,
stacklevel=3,
)
return self.hook.run_grant_dataset_view_access(*args, **kwargs)
[docs] def run_table_upsert(self, *args, **kwargs) -> dict:
"""
This method is deprecated.
Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.run_table_upsert`
"""
warnings.warn(
"This method is deprecated. "
"Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.run_table_upsert`",
DeprecationWarning,
stacklevel=3,
)
return self.hook.run_table_upsert(*args, **kwargs)
[docs] def run_table_delete(self, *args, **kwargs) -> None:
"""
This method is deprecated.
Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.run_table_delete`
"""
warnings.warn(
"This method is deprecated. "
"Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.run_table_delete`",
DeprecationWarning,
stacklevel=3,
)
return self.hook.run_table_delete(*args, **kwargs)
[docs] def get_tabledata(self, *args, **kwargs) -> List[dict]:
"""
This method is deprecated.
Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.get_tabledata`
"""
warnings.warn(
"This method is deprecated. "
"Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.get_tabledata`",
DeprecationWarning,
stacklevel=3,
)
return self.hook.get_tabledata(*args, **kwargs)
[docs] def get_schema(self, *args, **kwargs) -> dict:
"""
This method is deprecated.
Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.get_schema`
"""
warnings.warn(
"This method is deprecated. "
"Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.get_schema`",
DeprecationWarning,
stacklevel=3,
)
return self.hook.get_schema(*args, **kwargs)
[docs] def poll_job_complete(self, *args, **kwargs) -> bool:
"""
This method is deprecated.
Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.poll_job_complete`
"""
warnings.warn(
"This method is deprecated. "
"Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.poll_job_complete`",
DeprecationWarning,
stacklevel=3,
)
return self.hook.poll_job_complete(*args, **kwargs)
[docs] def cancel_query(self, *args, **kwargs) -> None:
"""
This method is deprecated.
Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.cancel_query`
"""
warnings.warn(
"This method is deprecated. "
"Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.cancel_query`",
DeprecationWarning,
stacklevel=3,
)
return self.hook.cancel_query(*args, **kwargs) # type: ignore
[docs] def run_with_configuration(self, *args, **kwargs) -> str:
"""
This method is deprecated.
Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.run_with_configuration`
"""
warnings.warn(
"This method is deprecated. "
"Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.run_with_configuration`",
DeprecationWarning,
stacklevel=3,
)
return self.hook.run_with_configuration(*args, **kwargs)
[docs] def run_load(self, *args, **kwargs) -> str:
"""
This method is deprecated.
Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.run_load`
"""
warnings.warn(
"This method is deprecated. "
"Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.run_load`",
DeprecationWarning,
stacklevel=3,
)
return self.hook.run_load(*args, **kwargs)
[docs] def run_copy(self, *args, **kwargs) -> str:
"""
This method is deprecated.
Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.run_copy`
"""
warnings.warn(
"This method is deprecated. "
"Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.run_copy`",
DeprecationWarning,
stacklevel=3,
)
return self.hook.run_copy(*args, **kwargs)
[docs] def run_query(self, *args, **kwargs) -> str:
"""
This method is deprecated.
Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.run_query`
"""
warnings.warn(
"This method is deprecated. "
"Please use `airflow.providers.google.cloud.hooks.bigquery.BigQueryHook.run_query`",
DeprecationWarning,
stacklevel=3,
)
return self.hook.run_query(*args, **kwargs)
[docs]class BigQueryCursor(BigQueryBaseCursor):
"""
A very basic BigQuery PEP 249 cursor implementation. The PyHive PEP 249
implementation was used as a reference:
https://github.com/dropbox/PyHive/blob/master/pyhive/presto.py
https://github.com/dropbox/PyHive/blob/master/pyhive/common.py
"""
def __init__(
self,
service: Any,
project_id: str,
hook: BigQueryHook,
use_legacy_sql: bool = True,
location: Optional[str] = None,
num_retries: int = 5,
) -> None:
super().__init__(
service=service,
project_id=project_id,
hook=hook,
use_legacy_sql=use_legacy_sql,
location=location,
num_retries=num_retries,
)
self.buffersize = None # type: Optional[int]
self.page_token = None # type: Optional[str]
self.job_id = None # type: Optional[str]
self.buffer = [] # type: list
self.all_pages_loaded = False # type: bool
self._description = [] # type: List
@property
[docs] def description(self) -> List:
"""Return the cursor description"""
return self._description
@description.setter
def description(self, value):
self._description = value
[docs] def close(self) -> None:
"""By default, do nothing"""
@property
[docs] def rowcount(self) -> int:
"""By default, return -1 to indicate that this is not supported"""
return -1
[docs] def execute(self, operation: str, parameters: Optional[dict] = None) -> None:
"""
Executes a BigQuery query, and returns the job ID.
:param operation: The query to execute.
:param parameters: Parameters to substitute into the query.
"""
sql = _bind_parameters(operation, parameters) if parameters else operation
self.flush_results()
self.job_id = self.hook.run_query(sql)
query_results = self._get_query_result()
description = _format_schema_for_description(query_results["schema"])
self.description = description
[docs] def executemany(self, operation: str, seq_of_parameters: list) -> None:
"""
Execute a BigQuery query multiple times with different parameters.
:param operation: The query to execute.
:param seq_of_parameters: List of dictionary parameters to substitute into the
query.
"""
for parameters in seq_of_parameters:
self.execute(operation, parameters)
[docs] def flush_results(self) -> None:
"""Flush results related cursor attributes"""
self.page_token = None
self.job_id = None
self.all_pages_loaded = False
self.buffer = []
[docs] def fetchone(self) -> Union[List, None]:
"""Fetch the next row of a query result set"""
return self.next()
[docs] def next(self) -> Union[List, None]:
"""
Helper method for fetchone, which returns the next row from a buffer.
If the buffer is empty, attempts to paginate through the result set for
the next page, and load it into the buffer.
"""
if not self.job_id:
return None
if not self.buffer:
if self.all_pages_loaded:
return None
query_results = self._get_query_result()
if 'rows' in query_results and query_results['rows']:
self.page_token = query_results.get('pageToken')
fields = query_results['schema']['fields']
col_types = [field['type'] for field in fields]
rows = query_results['rows']
for dict_row in rows:
typed_row = [_bq_cast(vs['v'], col_types[idx]) for idx, vs in enumerate(dict_row['f'])]
self.buffer.append(typed_row)
if not self.page_token:
self.all_pages_loaded = True
else:
# Reset all state since we've exhausted the results.
self.flush_results()
return None
return self.buffer.pop(0)
[docs] def fetchmany(self, size: Optional[int] = None) -> list:
"""
Fetch the next set of rows of a query result, returning a sequence of sequences
(e.g. a list of tuples). An empty sequence is returned when no more rows are
available. The number of rows to fetch per call is specified by the parameter.
If it is not given, the cursor's arraysize determines the number of rows to be
fetched. The method should try to fetch as many rows as indicated by the size
parameter. If this is not possible due to the specified number of rows not being
available, fewer rows may be returned. An :py:class:`~pyhive.exc.Error`
(or subclass) exception is raised if the previous call to
:py:meth:`execute` did not produce any result set or no call was issued yet.
"""
if size is None:
size = self.arraysize
result = []
for _ in range(size):
one = self.fetchone()
if one is None:
break
result.append(one)
return result
[docs] def fetchall(self) -> List[list]:
"""
Fetch all (remaining) rows of a query result, returning them as a sequence of
sequences (e.g. a list of tuples).
"""
result = []
while True:
one = self.fetchone()
if one is None:
break
result.append(one)
return result
[docs] def get_arraysize(self) -> int:
"""Specifies the number of rows to fetch at a time with .fetchmany()"""
return self.buffersize or 1
[docs] def set_arraysize(self, arraysize: int) -> None:
"""Specifies the number of rows to fetch at a time with .fetchmany()"""
self.buffersize = arraysize
[docs] arraysize = property(get_arraysize, set_arraysize)
[docs] def setoutputsize(self, size: Any, column: Any = None) -> None:
"""Does nothing by default"""
def _get_query_result(self) -> Dict:
"""Get job query results like data, schema, job type..."""
query_results = (
self.service.jobs()
.getQueryResults(
projectId=self.project_id,
jobId=self.job_id,
location=self.location,
pageToken=self.page_token,
)
.execute(num_retries=self.num_retries)
)
return query_results
def _bind_parameters(operation: str, parameters: dict) -> str:
"""Helper method that binds parameters to a SQL query"""
# inspired by MySQL Python Connector (conversion.py)
string_parameters = {} # type Dict[str, str]
for (name, value) in parameters.items():
if value is None:
string_parameters[name] = 'NULL'
elif isinstance(value, str):
string_parameters[name] = "'" + _escape(value) + "'"
else:
string_parameters[name] = str(value)
return operation % string_parameters
def _escape(s: str) -> str:
"""Helper method that escapes parameters to a SQL query"""
e = s
e = e.replace('\\', '\\\\')
e = e.replace('\n', '\\n')
e = e.replace('\r', '\\r')
e = e.replace("'", "\\'")
e = e.replace('"', '\\"')
return e
def _bq_cast(string_field: str, bq_type: str) -> Union[None, int, float, bool, str]:
"""
Helper method that casts a BigQuery row to the appropriate data types.
This is useful because BigQuery returns all fields as strings.
"""
if string_field is None:
return None
elif bq_type == 'INTEGER':
return int(string_field)
elif bq_type in ('FLOAT', 'TIMESTAMP'):
return float(string_field)
elif bq_type == 'BOOLEAN':
if string_field not in ['true', 'false']:
raise ValueError(f"{string_field} must have value 'true' or 'false'")
return string_field == 'true'
else:
return string_field
[docs]def split_tablename(
table_input: str, default_project_id: str, var_name: Optional[str] = None
) -> Tuple[str, str, str]:
if '.' not in table_input:
raise ValueError(f'Expected table name in the format of <dataset>.<table>. Got: {table_input}')
if not default_project_id:
raise ValueError("INTERNAL: No default project is specified")
def var_print(var_name):
if var_name is None:
return ""
else:
return f"Format exception for {var_name}: "
if table_input.count('.') + table_input.count(':') > 3:
raise Exception(f'{var_print(var_name)}Use either : or . to specify project got {table_input}')
cmpt = table_input.rsplit(':', 1)
project_id = None
rest = table_input
if len(cmpt) == 1:
project_id = None
rest = cmpt[0]
elif len(cmpt) == 2 and cmpt[0].count(':') <= 1:
if cmpt[-1].count('.') != 2:
project_id = cmpt[0]
rest = cmpt[1]
else:
raise Exception(
f'{var_print(var_name)}Expect format of (<project:)<dataset>.<table>, got {table_input}'
)
cmpt = rest.split('.')
if len(cmpt) == 3:
if project_id:
raise ValueError(f"{var_print(var_name)}Use either : or . to specify project")
project_id = cmpt[0]
dataset_id = cmpt[1]
table_id = cmpt[2]
elif len(cmpt) == 2:
dataset_id = cmpt[0]
table_id = cmpt[1]
else:
raise Exception(
f'{var_print(var_name)}Expect format of (<project.|<project:)<dataset>.<table>, got {table_input}'
)
if project_id is None:
if var_name is not None:
log.info(
'Project not included in %s: %s; using project "%s"',
var_name,
table_input,
default_project_id,
)
project_id = default_project_id
return project_id, dataset_id, table_id
def _cleanse_time_partitioning(
destination_dataset_table: Optional[str], time_partitioning_in: Optional[Dict]
) -> Dict: # if it is a partitioned table ($ is in the table name) add partition load option
if time_partitioning_in is None:
time_partitioning_in = {}
time_partitioning_out = {}
if destination_dataset_table and '$' in destination_dataset_table:
time_partitioning_out['type'] = 'DAY'
time_partitioning_out.update(time_partitioning_in)
return time_partitioning_out
def _validate_value(key: Any, value: Any, expected_type: Type) -> None:
"""Function to check expected type and raise error if type is not correct"""
if not isinstance(value, expected_type):
raise TypeError(f"{key} argument must have a type {expected_type} not {type(value)}")
def _api_resource_configs_duplication_check(
key: Any, value: Any, config_dict: dict, config_dict_name='api_resource_configs'
) -> None:
if key in config_dict and value != config_dict[key]:
raise ValueError(
"Values of {param_name} param are duplicated. "
"{dict_name} contained {param_name} param "
"in `query` config and {param_name} was also provided "
"with arg to run_query() method. Please remove duplicates.".format(
param_name=key, dict_name=config_dict_name
)
)
def _validate_src_fmt_configs(
source_format: str,
src_fmt_configs: dict,
valid_configs: List[str],
backward_compatibility_configs: Optional[Dict] = None,
) -> Dict:
"""
Validates the given src_fmt_configs against a valid configuration for the source format.
Adds the backward compatibility config to the src_fmt_configs.
:param source_format: File format to export.
:param src_fmt_configs: Configure optional fields specific to the source format.
:param valid_configs: Valid configuration specific to the source format
:param backward_compatibility_configs: The top-level params for backward-compatibility
"""
if backward_compatibility_configs is None:
backward_compatibility_configs = {}
for k, v in backward_compatibility_configs.items():
if k not in src_fmt_configs and k in valid_configs:
src_fmt_configs[k] = v
for k, v in src_fmt_configs.items():
if k not in valid_configs:
raise ValueError(f"{k} is not a valid src_fmt_configs for type {source_format}.")
return src_fmt_configs
def _format_schema_for_description(schema: Dict) -> List:
"""
Reformat the schema to match cursor description standard which is a tuple
of 7 elemenbts (name, type, display_size, internal_size, precision, scale, null_ok)
"""
description = []
for field in schema["fields"]:
field_description = (
field["name"],
field["type"],
None,
None,
None,
None,
field["mode"] == "NULLABLE",
)
description.append(field_description)
return description
