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import logging | |
from airflow.hooks.postgres_hook import PostgresHook | |
from airflow.models import BaseOperator | |
from airflow.utils.decorators import apply_defaults | |
class SelectPostgresOperator(BaseOperator): | |
""" | |
Executes sql code in a specific Postgres database | |
and returns table result as a pandas dataframe | |
:param postgres_conn_id: reference to a specific postgres database | |
:type postgres_conn_id: string | |
:param sql: the sql code to be executed | |
:type sql: Can receive a str representing a sql statement, | |
a list of str (sql statements), or reference to a template file. | |
Template reference are recognized by str ending in '.sql' | |
""" | |
template_fields = ('sql',) | |
template_ext = ('.sql',) | |
ui_color = '#ededed' | |
@apply_defaults | |
def __init__( | |
self, sql, | |
postgres_conn_id='select_postgres_default', autocommit=False, | |
parameters=None, | |
*args, **kwargs): | |
super(SelectPostgresOperator, self).__init__(*args, **kwargs) | |
self.sql = sql | |
self.postgres_conn_id = postgres_conn_id | |
self.hook = PostgresHook(postgres_conn_id=self.postgres_conn_id) | |
self.autocommit = autocommit | |
self.parameters = parameters | |
def execute(self, context): | |
logging.info("Executing: " + str(self.sql)) | |
df = self.hook.get_pandas_df(self.sql, parameters=self.parameters) | |
logging.info("Result count: {0}".format(len(df))) | |
return df |
@fpopic is this code finally worked for you? Have you updated the correct version? I have exactly the same issue..
I am using airflow 2.0.2, and this is my modification, is this ok?
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# 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
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
from typing import Iterable, Mapping, Optional, Union
from airflow.models import BaseOperator
from airflow.providers.postgres.hooks.postgres import PostgresHook
from airflow.utils.decorators import apply_defaults
class PostgresOperator(BaseOperator):
"""
Executes sql code in a specific Postgres database
:param sql: the sql code to be executed. (templated)
:type sql: Can receive a str representing a sql statement,
a list of str (sql statements), or reference to a template file.
Template reference are recognized by str ending in '.sql'
:param postgres_conn_id: The :ref:`postgres conn id <howto/connection:postgres>`
reference to a specific postgres database.
:type postgres_conn_id: str
:param autocommit: if True, each command is automatically committed.
(default value: False)
:type autocommit: bool
:param parameters: (optional) the parameters to render the SQL query with.
:type parameters: dict or iterable
:param database: name of database which overwrite defined one in connection
:type database: str
"""
template_fields = ('sql',)
template_fields_renderers = {'sql': 'sql'}
template_ext = ('.sql',)
ui_color = '#ededed'
@apply_defaults
def __init__(
self,
*,
sql: str,
postgres_conn_id: str = 'postgres_default',
autocommit: bool = False,
parameters: Optional[Union[Mapping, Iterable]] = None,
database: Optional[str] = None,
**kwargs,
) -> None:
super().__init__(**kwargs)
self.sql = sql
self.postgres_conn_id = postgres_conn_id
self.autocommit = autocommit
self.parameters = parameters
self.database = database
self.hook = None
def execute(self, context):
self.log.info('Executing: %s', self.sql)
self.hook = PostgresHook(postgres_conn_id=self.postgres_conn_id, schema=self.database)
run = self.hook.run(self.sql, self.autocommit, parameters=self.parameters)
for output in self.hook.conn.notices:
self.log.info(output)
return run
@fpopic is this code finally worked for you? Have you updated the correct version? I have exactly the same issue..
I think it did. You can see in revisions https://gist.github.com/fpopic/35807489d9c36c7ea8bc4de6f966b5fc/revisions that I swapped 32 and 34 lines. :) Didn't use for a while so don't know what's the state today.
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@razius Thanks, updated!