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Posted to commits@airflow.apache.org by GitBox <gi...@apache.org> on 2020/06/11 21:09:42 UTC
[GitHub] [airflow] samuelkhtu commented on a change in pull request #9124: [AIRFLOW-9099] Merging multiple sql operators
samuelkhtu commented on a change in pull request #9124:
URL: https://github.com/apache/airflow/pull/9124#discussion_r439072172
##########
File path: airflow/operators/sql_branch_operator.py
##########
@@ -14,162 +14,15 @@
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
-
-from distutils.util import strtobool
-from typing import Dict, Iterable, List, Mapping, Optional, Union
-
-from airflow.exceptions import AirflowException
-from airflow.hooks.base_hook import BaseHook
-from airflow.models import BaseOperator, SkipMixin
-from airflow.utils.decorators import apply_defaults
-
-ALLOWED_CONN_TYPE = {
- "google_cloud_platform",
- "jdbc",
- "mssql",
- "mysql",
- "odbc",
- "oracle",
- "postgres",
- "presto",
- "sqlite",
- "vertica",
-}
-
-
-class BranchSqlOperator(BaseOperator, SkipMixin):
- """
- Executes sql code in a specific database
-
- :param sql: the sql code to be executed. (templated)
- :type sql: Can receive a str representing a sql statement or reference to a template file.
- Template reference are recognized by str ending in '.sql'.
- Expected SQL query to return Boolean (True/False), integer (0 = False, Otherwise = 1)
- or string (true/y/yes/1/on/false/n/no/0/off).
- :param follow_task_ids_if_true: task id or task ids to follow if query return true
- :type follow_task_ids_if_true: str or list
- :param follow_task_ids_if_false: task id or task ids to follow if query return true
- :type follow_task_ids_if_false: str or list
- :param conn_id: reference to a specific database
- :type conn_id: str
- :param database: name of database which overwrite defined one in connection
- :param parameters: (optional) the parameters to render the SQL query with.
- :type parameters: mapping or iterable
- """
-
- template_fields = ("sql",)
- template_ext = (".sql",)
- ui_color = "#a22034"
- ui_fgcolor = "#F7F7F7"
-
- @apply_defaults
- def __init__(
- self,
- sql: str,
- follow_task_ids_if_true: List[str],
- follow_task_ids_if_false: List[str],
- conn_id: str = "default_conn_id",
- database: Optional[str] = None,
- parameters: Optional[Union[Mapping, Iterable]] = None,
- *args,
- **kwargs,
- ) -> None:
- super().__init__(*args, **kwargs)
- self.conn_id = conn_id
- self.sql = sql
- self.parameters = parameters
- self.follow_task_ids_if_true = follow_task_ids_if_true
- self.follow_task_ids_if_false = follow_task_ids_if_false
- self.database = database
- self._hook = None
-
- def _get_hook(self):
- self.log.debug("Get connection for %s", self.conn_id)
- conn = BaseHook.get_connection(self.conn_id)
-
- if conn.conn_type not in ALLOWED_CONN_TYPE:
- raise AirflowException(
- "The connection type is not supported by BranchSqlOperator. "
- + "Supported connection types: {}".format(list(ALLOWED_CONN_TYPE))
- )
-
- if not self._hook:
- self._hook = conn.get_hook()
- if self.database:
- self._hook.schema = self.database
-
- return self._hook
-
- def execute(self, context: Dict):
- # get supported hook
- self._hook = self._get_hook()
-
- if self._hook is None:
- raise AirflowException(
- "Failed to establish connection to '%s'" % self.conn_id
- )
-
- if self.sql is None:
- raise AirflowException("Expected 'sql' parameter is missing.")
-
- if self.follow_task_ids_if_true is None:
- raise AirflowException(
- "Expected 'follow_task_ids_if_true' paramter is missing."
- )
-
- if self.follow_task_ids_if_false is None:
- raise AirflowException(
- "Expected 'follow_task_ids_if_false' parameter is missing."
- )
-
- self.log.info(
- "Executing: %s (with parameters %s) with connection: %s",
- self.sql,
- self.parameters,
- self._hook,
- )
- record = self._hook.get_first(self.sql, self.parameters)
- if not record:
- raise AirflowException(
- "No rows returned from sql query. Operator expected True or False return value."
- )
-
- if isinstance(record, list):
- if isinstance(record[0], list):
- query_result = record[0][0]
- else:
- query_result = record[0]
- elif isinstance(record, tuple):
- query_result = record[0]
- else:
- query_result = record
-
- self.log.info("Query returns %s, type '%s'", query_result, type(query_result))
-
- follow_branch = None
- try:
- if isinstance(query_result, bool):
- if query_result:
- follow_branch = self.follow_task_ids_if_true
- elif isinstance(query_result, str):
- # return result is not Boolean, try to convert from String to Boolean
- if bool(strtobool(query_result)):
- follow_branch = self.follow_task_ids_if_true
- elif isinstance(query_result, int):
- if bool(query_result):
- follow_branch = self.follow_task_ids_if_true
- else:
- raise AirflowException(
- "Unexpected query return result '%s' type '%s'"
- % (query_result, type(query_result))
- )
-
- if follow_branch is None:
- follow_branch = self.follow_task_ids_if_false
- except ValueError:
- raise AirflowException(
- "Unexpected query return result '%s' type '%s'"
- % (query_result, type(query_result))
- )
-
- self.skip_all_except(context["ti"], follow_branch)
+"""This module is deprecated. Please use `airflow.operators.sql`."""
+import warnings
+
+# pylint: disable=unused-import
+# flake8: noqa F401
+from airflow.operators.sql import BranchSQLOperator as BranchSqlOperator
Review comment:
Got it. Thanks. I updated the code.
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