返回当前执行上下文的用户名。
Syntax
from pyspark.sql import functions as sf
sf.session_user()
例子
示例 1：获取会话用户
from pyspark.sql import functions as sf
spark.range(1).select(sf.session_user()).show()
+--------------+
|session_user()|
+--------------+
| ruifeng.zheng|
+--------------+