SCALA column object LEFT OUTER JOIN operator === vs <=>

Asked Aug 08 '17 at 14:46

Active Aug 08 '17 at 14:46

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I have been trying to find out what is the difference between using:

left.join(right, left.col("C_ClientID") === right.col("A_ClientID"), "left_outer")

and

left.join(right, left.col("C_ClientID") <=> right.col("A_ClientID"), "left_outer")

But I'm having a hard time finding any information on <=>

anyone on Stack know the answer?

asked Aug 08 '17 at 14:46

Fuzzy

1

<=> is the null safe operator. See [this answer](https://stackoverflow.com/a/41729359/1547734) – Assaf Mendelson Aug 08 '17 at 15:23
@AssafMendelson great thanks. There is nothing on this in the docs – Fuzzy Aug 08 '17 at 15:24

0 Answers0