[SOLR-10156] Add significantTerms Streaming Expression

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Resolved
• Fix Version/s: 6.5
• Assignee: Joel Bernstein
• Reporter: Joel Bernstein
• Created: 17/Feb/17 17:32
• Updated: 08/Oct/19 14:51
• Resolved: 03/Mar/17 20:11

Description

The significantTerms Streaming Expression will emit a set of terms from a text field within a doc frequency range for a specific query. It will also score the terms based on how many times the terms appear in the result set, and how many times the terms appear in the corpus, and return the top N terms based on this significance score.

Syntax:

significantTerms(collection, 
                 q="any query", 
                 field="some_text_field", 
                 minDocFreq="5",   //optional default is 5 documents
                 maxDocFreq=".3", // optional default is no more then 30% of the index (.3)
                 minTermLength="4",  // optional default is 4
                 limit="50")                // optional default is 20

Issue Links

• relates to: SOLR-10217 Add a query for the background set to the significantTerms streaming expression
• relates to: SOLR-12395 Typo in SignificantTermsQParserPlugin.NAME