Julian Hyde created CALCITE-1414:
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Summary: Add a RANDOM function
Key: CALCITE-1414
URL: https://issues.apache.org/jira/browse/CALCITE-1414
Project: Calcite
Issue Type: Bug
Reporter: Julian Hyde
Assignee: Julian Hyde
Add a RANDOM function.
It is not standard SQL, but most DBMSs have one, and it be useful.
It will also allow us to better test non-deterministic expressions.
I propose that:
* {{RANDOM(n)}} returns an integer between 0 and n - 1 inclusive.
* There is no facility to specify a seed at this time.
* The random number generator is randomly seeded at query start time based on
(say) the method used by Java's {{new Random()}}; if you run the query twice,
you will (probably) not get the same results.
* If you call the function twice in the same row, it will (probably) return
different results.
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