[LUCENE-8285] FSTOrdPostingsFormat ironically does not support ord()

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: core/codecs
• Lucene Fields: New
• Assignee: Unassigned
• Reporter: David Smiley
• Created: 01/May/18 15:53
• Updated: 28/Aug/22 15:29

Description

Ironically, FSTOrdPostingsFormat has a TermsEnum.ord() that throws UnsupportedOperationException. There are TODOs here and some discussion in LUCENE-3069 (CC billy). Isn't supporting ord() entirely the point of this postings format?

Additionally, if ord() was supported,couldn't TermState be effectively the ordinal, thus making it lighter-weight/cheaper?

Issue Links

• relates to: LUCENE-3069 Lucene should have an entirely memory resident term dictionary