如何在CDH5.16.2中安装Python Impyla

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发布于 2020-07-10 14:55:54

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文档编写目的

整理CDH5中安装Impyla的步骤

集群环境

CDH5.16.2
anaconda3
python3.7

组件介绍

Impyla：适用于分布式查询引擎的HiveServer2实现（例如Impala，Hive）的Python客户端。

Impyla依赖包

six
bit_array
thriftpy
thrift_sasl
sasl

安装依赖

安装thrift_sasl需要先执行，否则安装会提示缺少sasl.h文件

yum install gcc-c++ python-devel.x86_64 cyrus-sasl-devel.x86_64

安装其他依赖

pip install bit_array
pip install thriftpy
pip install six
#指定thrift_sasl==0.2.1, 否则连接hive会报错
pip install thrift_sasl
pip install sasl

安装Impyla

python3.7不支持最新的版本，需要指定impyla的版本为0.15a1

/usr/local/anaconda3/bin/pip install impyla==0.15a1

Impyla测试

Impala

需要impala的jdbc对应的ip和端口

from impala.dbapi import connect
conn = connect(host='192.168.xx.xx',port=25004)
print(conn)
cursor = conn.cursor()
cursor.execute('show databases')
results = cursor.fetchall()
print(results)
cursor.execute('SELECT distinct id FROM ods.test limit 10')
series_code = cursor.fetchall()
print(series_code)

Hive

from impala.dbapi import connect
conn = connect(host="192.168.xx.xx", port=25005, database="ods", auth_mechanism="PLAIN")
print(conn)
cursor = conn.cursor()
cursor.execute("show databases")
print(cursor.description)
results = cursor.fetchall()
print(results)
cursor.execute("select distinct series_code from ods.test")
print(cursor)
series_code = cursor.fetchall()
print(series_code)