Source code for airflow.providers.mysql.transfers.presto_to_mysql

# 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
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
from __future__ import annotations

from typing import TYPE_CHECKING, Sequence

from airflow.models import BaseOperator
from airflow.providers.mysql.hooks.mysql import MySqlHook
from airflow.providers.presto.hooks.presto import PrestoHook

    from airflow.utils.context import Context

[docs]class PrestoToMySqlOperator(BaseOperator): """ Moves data from Presto to MySQL. Note that for now the data is loaded into memory before being pushed to MySQL, so this operator should be used for smallish amount of data. :param sql: SQL query to execute against Presto. (templated) :param mysql_table: target MySQL table, use dot notation to target a specific database. (templated) :param mysql_conn_id: Reference to :ref:`mysql connection id <howto/connection:mysql>`. :param presto_conn_id: source presto connection :param mysql_preoperator: sql statement to run against mysql prior to import, typically use to truncate of delete in place of the data coming in, allowing the task to be idempotent (running the task twice won't double load data). (templated) """
[docs] template_fields: Sequence[str] = ("sql", "mysql_table", "mysql_preoperator")
[docs] template_ext: Sequence[str] = (".sql",)
[docs] template_fields_renderers = { "sql": "sql", "mysql_preoperator": "mysql", }
[docs] ui_color = "#a0e08c"
def __init__( self, *, sql: str, mysql_table: str, presto_conn_id: str = "presto_default", mysql_conn_id: str = "mysql_default", mysql_preoperator: str | None = None, **kwargs, ) -> None: super().__init__(**kwargs) self.sql = sql self.mysql_table = mysql_table self.mysql_conn_id = mysql_conn_id self.mysql_preoperator = mysql_preoperator self.presto_conn_id = presto_conn_id
[docs] def execute(self, context: Context) -> None: presto = PrestoHook(presto_conn_id=self.presto_conn_id)"Extracting data from Presto: %s", self.sql) results = presto.get_records(self.sql) mysql = MySqlHook(mysql_conn_id=self.mysql_conn_id) if self.mysql_preoperator:"Running MySQL preoperator")"Inserting rows into MySQL") mysql.insert_rows(table=self.mysql_table, rows=results)

Was this entry helpful?