My particular use case can throw an error if the lists are different length.
I think our real goal should be to have a logically complete set of simple primitives that lets any sort of back and forward conversions of this kind. On Fri, May 29, 2015 at 9:58 AM, Jason Altekruse <[email protected]> wrote: > I understand what you want to do, unfortunately we don't have support for > this right now. A UDF is the best I can suggest at this point. > > Just to explore the idea a little further for the sake of creating a > complete feature request, I assume you would just want nulls filled in for > the cases where the lists were different lengths? > > On Fri, May 29, 2015 at 8:58 AM, Ted Dunning <[email protected]> > wrote: > > > Input is here: https://gist.github.com/tdunning/07ce66e7e4d4af41afd7 > > > > Output is here: https://gist.github.com/tdunning/3aa841c56bfcdc0ab90e > > > > log-synth schema for generating input data is here: > > https://gist.github.com/tdunning/638dd52c00569ffa9582 > > > > > > Preferred syntax would be like > > > > select flatten(t, v1, v2) from ... > > > > > > > > > > On Fri, May 29, 2015 at 7:04 AM, Neeraja Rentachintala < > > [email protected]> wrote: > > > > > Ted > > > can you pls give an example with few data elements in a, b and the > > expected > > > output you are looking from the query. > > > > > > -Neeraja > > > > > > On Fri, May 29, 2015 at 6:43 AM, Ted Dunning <[email protected]> > > > wrote: > > > > > > > I have two arrays. Their elements are correlated times and values. > I > > > > would like to flatten them into rows, each with two elements. > > > > > > > > The query > > > > > > > > select flatten(a), flatten(b) from ... > > > > > > > > doesn't work because I get the cartesian product (of course). The > > query > > > > > > > > select flatten(a, b) from ... > > > > > > > > also doesn't work because flatten doesn't have a multi-argument form. > > > > > > > > Going crazy, this query kind of sort of almost works, but not really: > > > > > > > > select r.x.`key`, flatten(r.x.`value`) from ( > > > > > > > > select flatten(kvgen(x)) as x from ...) r; > > > > > > > > What I really want to see is something like this: > > > > select zip(flatten(a), flatten(b)) from ... > > > > > > > > Any pointers? Is my next step to write a UDF? > > > > > > > > > >
