The Query Fields query pipeline stage defines common Solr query parameters for the edismax query parser. If using a less-than sign (Documentation Index
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<) with DisMax, it must be escaped using a backslash.
An alternative to this stage is the
Additional Query Parameters stage.
Collapsing results
In Lucidworks Search 5.9.13 and up, you can configure this stage to collapse search results based on a field, such asproduct_id, to group all variations of each item into a single search result.
This is useful for ecommerce sites where you want to show a single product with multiple SKUs or variations.
For additional collapse options, see the configuration reference below.