更新时间:2022-11-27 08:10:12
Checkout the Section "Supported Hive Feature on Spark SQL Programming guide link and you will find it in the list of Hive Operators supported by Spark.
这是它的作用:
但是:
如果两者均为NULL,则返回TRUE
it returns TRUE if both are NULL
如果其中之一为NULL,则返回FALSE
it returns FALSE if one of them is NULL