How to use Impala to read data in Python?

To read data using Impala in Python, you can use the Impyla library. First, you will need to install the Impyla library, which can be done using pip.

pip install impyla

Next, you can use the following code to connect to the Impala server and execute a query:

from impala.dbapi import connect

# 连接Impala服务器
conn = connect(host='your_impala_host', port=21050)

# 创建游标
cursor = conn.cursor()

# 执行查询
cursor.execute('SELECT * FROM your_table')

# 获取查询结果
results = cursor.fetchall()

# 打印查询结果
for row in results:
    print(row)

# 关闭连接
cursor.close()
conn.close()

In the code above, you need to replace your_impala_host with the hostname or IP address of the Impala server, and your_table with the name of the table you want to query. You can execute different query statements as needed, and further process the query results.