Question

有谁知道如何从python建立与Apache钻取的连接？

通常，通过pyodbc库的连接如下：

connection = pyodbc.connect(connectionString)

连接字符串的格式通常为“DSN = *; UID = * ; PWD = ***”。我不知道如何在这里设置连接字符串。

谢谢！

Answer 1

另一种替代解决方案是使用https://github.com/PythonicNinja/pydrill

pip install pydrill

连接很简单：

drill = PyDrill(host='localhost', port=8047)

或使用env变量：

PYDRILL_HOST='127.0.0.1' 
PYDRILL_PORT=8047

在ipython中使用：

ipython
from pydrill.client import PyDrill
drill = PyDrill()
drill.query(sql)

您可以查询配置文件/存储选项并与之交互：

drill = PyDrill()
drill.storage_enable('mongo')

Answer 2

编辑文件~/.odbc.ini以配置直接模式连接（直接与Drillbit）或与zookeeper仲裁详细信息的群集模式连接。

[ODBC]
Trace=no

[ODBC Data Sources]
[drill64]
# This key is not necessary and is only to give a description of the data source.
Description=MapR Drill ODBC Driver (64-bit) DSN

# Driver: The location where the ODBC driver is installed to.
Driver=/opt/mapr/drillodbc/lib/64/libmaprdrillodbc64.so

ConnectionType=ZooKeeper
ZKQuorum=maprdemo:5181
ZKClusterID=mapr_demo_com-drillbits
AuthenticationType=No Authentication
Catalog=DRILL
Schema=

示例代码段连接到Drill并运行查询：

import pyodbc
from pandas import *

# initialize the connection
conn = pyodbc.connect("DSN=drill64", autocommit=True)
cursor = conn.cursor()

# setup the query and run it
s = <SQL Query HERE>

# fetch and display filtered output
cursor.execute(s)

查看blog了解详情。

从Python连接到Apache钻取

2 个答案: