[SOLR-12273] Create Stream Evaluators for distance measures

• Type: New Feature
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Fix Version/s: 8.1, master (9.0)
• Assignee: Joel Bernstein
• Reporter: Joel Bernstein
• Created: 25/Apr/18 17:04
• Updated: 08/Oct/19 14:51

Description

Currently distance measures are instantiated by passing the name of the distance measure to a function, for example the knn function can be passed the named parameter: distance="manhattan". 

This ticket will create a specific function for each distance measure which will be used to specify which distance measure to apply. With this design the knn function would be passed the function: manhattan() or any of the other distance measure functions.

Sample syntax:

knn(a, b, manhattan())

or

dbscan(a, haversineMeters())

 

 

Issue Links

• is related to: SOLR-12019 Prepare Streaming Expressions for machine learning functions