Aaron Davidson 00275ce3a9 (IMPALA-422) Add string concatenation function ...

Implements a group_concat() function which concatenates all the values in a group together.

The format is group_concat(str_col, [separator]). The default separator is ', '. NULLs
are ignored.

Change-Id: If152df6f528401117dba81d66ef691bfb548cc7d
Reviewed-on: http://gerrit.ent.cloudera.com:8080/117
Reviewed-by: Aaron Davidson <aaron.davidson@cloudera.com>
Tested-by: Aaron Davidson <aaron.davidson@cloudera.com>

2014-01-08 10:52:21 -08:00

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