[COUCHDB-1413] Reduce queries with ?inclusive_end=false and endkey/endkey_docid or startkey/startkey_docid (if ?descending=true) produce incorrect reductions

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.1.1
• Fix Version/s: 1.2, 1.2.1
• Assignee: Filipe David Borba Manana
• Reporter: Filipe David Borba Manana
• Created: 18/Feb/12 13:54
• Updated: 22/Feb/12 21:37
• Resolved: 22/Feb/12 21:37

Description

COUCHDB-1047 attempted to fix endkey being ignored for reduce queries. It works but it's busted when endkey_docid is also present, as it produces wrong results. Using end_key_gt as an endkey in the btree fold reduce operation is not enough to guarantee correct results for all cases.

The following script reproduces the issue and the following patch fixes it.