[GitHub] [druid] abhishekagarwal87 commented on issue #10800: Does druid.io sql query support group_concat?

[GitBox <gi...@apache.org>]

abhishekagarwal87 commented on issue #10800:
URL: https://github.com/apache/druid/issues/10800#issuecomment-767517328


   There is no support from the `group_concat` function as of today. One challenge with implementing such a function is that size of the aggregated value is not constant across rows. Users can pass a maximum size as input but that can lead to inefficient usage of memory since druid also doesn't support growable buffers as of yet. 


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