Lucene has a custom query syntax for querying its indexes. Here are some query examples demonstrating the query syntax.

event_status:New

event_status:Closed

event_status:Ignored

event_status:"In Progress"

event_status:New OR event_status:Closed OR event_status:"In Progress"

Explanation

Keyword matching

Search for word "New" in the event_status field.

event_status:New

Search for phrase "In Progress" in the event_status field.

event_status:"In Progress"

Search for phrase "In Progress" in the event_status field AND the phrase "3q432423" in the engid field.

event_status:"In Progress" AND engid:3q432423

Search for either the phrase "In Progress" in the event_status field AND the phrase "3q432423" in the engid field, or the word "New" in the event_status field.

(event_status:"In Progress" AND engid:3q432423) OR event_status:New

Search for word "new" and not "Closed" in the event_status field.

event_status:new -event_status:Closed