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Posted to jira@arrow.apache.org by "Ian Cook (Jira)" <ji...@apache.org> on 2021/05/10 14:20:00 UTC

[jira] [Created] (ARROW-12710) [C++] String concatenate aggregate kernel

Ian Cook created ARROW-12710:
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             Summary: [C++] String concatenate aggregate kernel
                 Key: ARROW-12710
                 URL: https://issues.apache.org/jira/browse/ARROW-12710
             Project: Apache Arrow
          Issue Type: New Feature
          Components: C++
            Reporter: Ian Cook


Like MySQL/Impala {{group_concat}} and PostgreSQL {{string_agg}}. Takes a string array and a separator (possibly optional?) and returns one scalar string (one per group in the case of group aggregation) representing all the string values in the array concatenated together, with the separator added between each pair of concatenated values.



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