Joel Bernstein created SOLR-12829:
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Summary: Add plist (parallel list) Streaming Expressions
Key: SOLR-12829
URL: https://issues.apache.org/jira/browse/SOLR-12829
Project: Solr
Issue Type: New Feature
Security Level: Public (Default Security Level. Issues are Public)
Reporter: Joel Bernstein
The *plist* Streaming Expression wraps any number of streaming expressions and
opens them in parallel. The results of each of the streams is then iterated in
the order they appear in the list. Since many streams perform heavy pushed down
operations when opened, like the FacetStream, this will result in the
parallelization of these operations. For example plist could wrap several
facet() expressions and open them each in parallel, which would cause the
facets to be run in parallel, on different replicas in the cluster. Here is
sample syntax:
{code:java}
plist(tuple(facet1=facet(...)),
tuple(facet2=facet(...)),
tuple(facet3=facet(...))){code}
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