drill-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Ted Dunning (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-3222) Need a zip function to combine coordinated lists
Date Sat, 30 May 2015 08:59:17 GMT
Ted Dunning created DRILL-3222:

             Summary: Need a zip function to combine coordinated lists
                 Key: DRILL-3222
                 URL: https://issues.apache.org/jira/browse/DRILL-3222
             Project: Apache Drill
          Issue Type: Bug
            Reporter: Ted Dunning

It is often very useful to be able to turn a pair (or more) of lists into a single list of
pairs.  Thus zip([a,b], [1,2]) => [[a,1], [b,2]].

The handling of short lists, more than two lists and so on is TBD, but the base function is
an important one.

One use case is in time series where storing times as one list and values as another is very
handy but processing these results would be much better done by using flatten(zip(times, values)).

This message was sent by Atlassian JIRA

View raw message