[SOLR-12122] nodes expression should support multiValued walk target

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: streaming expressions
• Assignee: Unassigned
• Reporter: David Smiley
• Created: 19/Mar/18 20:01
• Updated: 08/Oct/19 14:50

Description

The nodes streaming expression has a walk argument that articulates a pair of Solr fields of the form traversalFrom->traversalTo.  It assumed that they are not multiValued.  It appears not difficult to add multiValued support to traversalTo; that's what this issue is about.

See http://lucene.472066.n3.nabble.com/Using-multi-valued-field-in-solr-cloud-Graph-Traversal-Query-td4324379.html

Note: gatherNodes appears to be the older name which is still supported. It's more commonly known as nodes. graph-traversal.adoc documents it