[SOLR-8671] Date statistics: make "sum" a double instead of a long/date

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 6.0
• Assignee: Tomas Eduardo Fernandez Lobbe
• Reporter: Tomas Eduardo Fernandez Lobbe
• Created: 10/Feb/16 21:37
• Updated: 09/May/16 18:56
• Resolved: 28/Feb/16 17:21

Description

Currently DateStatsValues#sum is defined as long, and returned as a date. This has two problems: It overflows (with ~6 million values), and the return value can be a date like <date name="sum">122366-06-12T21:06:06Z</date>. I think we should just change this stat to a double. See SOLR-8420.
I think we can change this only in master, since it will break backward compatibility.