python与hive通信交互

death114

　　一、python与hive1通信

#!/usr/bin/python2.7
#hive --service hiveserver >/dev/null 2>/dev/null&
#/usr/lib/hive/lib/py
import sys
from hive_service import ThriftHive
from hive_service.ttypes import HiveServerException
from thrift import Thrift
from thrift.transport import TSocket
from thrift.transport import TTransport
from thrift.protocol import TBinaryProtocol
def hiveExe(sql):
try:
transport = TSocket.TSocket('*.*.*.*', 10000)
transport = TTransport.TBufferedTransport(transport)
protocol = TBinaryProtocol.TBinaryProtocol(transport)
client = ThriftHive.Client(protocol)
transport.open()
client.execute(sql)
print "The return value is : "
print client.fetchAll()
print "............"
transport.close()
except Thrift.TException, tx:
print '%s' % (tx.message)
if __name__ == '__main__':
hiveExe("select * from project.table")
　　python和hive1通讯是一件非常容易的事情，因为python所需要的依赖包从[size=1em]/usr/lib/hive/lib/py获取即可，导入到hive的扩张中就可以应用了。
　　[size=1em]二、python与hive2的通信

#!/usr/bin/python2.7
#hive --service hiveserver2 >/dev/null 2>/dev/null&
#install pyhs2,first install cyrus-sasl-devel,gcc,libxml2-devel,libxslt-devel
#hiveserver2 is different from hiveserver on authority
import pyhs2
conn = pyhs2.connect(host='*.*.*.*',port=10000,authMechanism="PLAIN", user='hive', password='', database='project')
cur = conn.cursor()
cur.execute("select * from table limit 10")
for i in cur.fetch():
print i
cur.close()
conn.close()
　　[size=1em]  python与hive2通信比较费劲，需要安装的依赖比较多（[size=1em]install pyhs2,first install cyrus-sasl-devel,gcc,libxml2-devel,libxslt-devel[size=1em]）。但是安装完成后编程还是很容易的。
　　[size=1em]  两种通讯有一个共同点，就是必须启动hive服务器。