返回当前数据库。
Syntax
from pyspark.sql import functions as sf
sf.current_user()
例子
示例 1：获取当前用户
from pyspark.sql import functions as sf
spark.range(1).select(sf.current_user()).show()
+--------------+
|current_user()|
+--------------+
| ruifeng.zheng|
+--------------+