I am seeing an issue where a random value in a sub-query gets re-generated each 
time the value is used in later queries.  Below is an example query:

SELECT r AS r1, r AS r2 FROM ( SELECT random() AS r FROM ( SELECT * from ( 
VALUES(1),(2) ) ) a ) b

One would expect r1 == r2.

---------------
John Mount
http://www.win-vector.com/ <http://www.win-vector.com/> 
Our book: Practical Data Science with R http://www.manning.com/zumel/ 
<http://www.manning.com/zumel/>



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