Joel Bernstein created SOLR-8556:
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Summary: Add ConcatOperation to be used with the SelectStream
Key: SOLR-8556
URL: https://issues.apache.org/jira/browse/SOLR-8556
Project: Solr
Issue Type: New Feature
Reporter: Joel Bernstein
Now that we have the UpdateStream it would be nice to support the use case of
sending rolled up aggregates for storage in another SolrCloud collection. To
support we'll need to create ID's for the aggregate records.
The ConcatOperation would allows us to concatenate the bucket values into a
unique id. For example:
{code}
update(
select(
rollup(search()),
concat(fields="a,b,c", delim="_", as="id")))
{code}
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