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Julian Feinauer edited comment on CALCITE-1414 at 12/15/16 11:03 AM: --------------------------------------------------------------------- I added a pull request: https://github.com/apache/calcite/pull/339 with my suggestion how to implement this function. I had to resubmit the PR https://github.com/apache/calcite/pull/338 due to a problem with the CI / Validator. Sorry for that. was (Author: julian.feinauer): I added a pull request: https://github.com/apache/calcite/pull/338 with my suggestion how to implement this function. > 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 > Labels: newbie > > 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)