Bug question about right anti join

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Bug question about right anti join

Chuang He
Dear Spark develop team,
Hope you are doing well. I'm a student from Monash University, and very interested in big data, so I took the course of learning Spark this semester, cause the Spark is a fantastic and powerful tool to deal with the big data. I am learning the related operations of Spark sql and use it to do some assignment this week, but I found that some difference from my previous learning SQL. I noticed that 'left anti join' and 'left semi join' are supported in Spark sql, but 'right anti join' and 'right semi join' are not supported. I don't think this is a bug, but I'm not sure, and I'm curious about why this happens. Could you clarify my doubt? Always happy to hear from you.
Best regard,
Chuang


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