# -*- coding: utf-8 -*-
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from airflow.hooks.postgres_hook import PostgresHook
from airflow.models import BaseOperator
from airflow.utils.decorators import apply_defaults
[docs]class PostgresOperator(BaseOperator):
"""
Executes sql code in a specific Postgres database
:param postgres_conn_id: reference to a specific postgres database
:type postgres_conn_id: string
: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 database: name of database which overwrite defined one in connection
:type database: string
"""
template_fields = ('sql',)
template_ext = ('.sql',)
ui_color = '#ededed'
@apply_defaults
def __init__(
self, sql,
postgres_conn_id='postgres_default', autocommit=False,
parameters=None,
database=None,
*args, **kwargs):
super(PostgresOperator, self).__init__(*args, **kwargs)
self.sql = sql
self.postgres_conn_id = postgres_conn_id
self.autocommit = autocommit
self.parameters = parameters
self.database = database
def execute(self, context):
self.log.info('Executing: %s', self.sql)
self.hook = PostgresHook(postgres_conn_id=self.postgres_conn_id,
schema=self.database)
self.hook.run(self.sql, self.autocommit, parameters=self.parameters)
for output in self.hook.conn.notices:
self.log.info(output)