salieri | Source-code annotation language compatibility header | File Utils library
kandi X-RAY | salieri Summary
kandi X-RAY | salieri Summary
Salieri is a header which provides definitions for Microsoft's source-code annotation language (SAL). Simply drop the header into your code and use it instead of including directly, and you can use SAL annotations even if you want your program to be portable to compilers which don't support it.
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QUESTION
I want to join 3 tables
using spark rdd
. I achieved my objective using spark sql but when I tried to join it using Rdd I am not getting the desired results. Below is my query using spark SQL
and the output
:
ANSWER
Answered 2018-Oct-20 at 21:46JOINs like this with RDDs are painful, that's another reason why DFs are nicer.
You get no data as the pair RDD = K, V has no common data for the K part of the last RDD. The K's with 101, 102 will join, but there is no commonality with the 901, 902. You need to shift things around, like this, my more limited example:
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