hi. while reading this[1], << More information about partial indexes can be found in [ston89b], [olson93], and [seshadri95]. I googled around, still cannot find [olson93] related pdf or html link.
in [2], I found out [ong90] “A Unified Framework for Version Modeling Using Production Rules in a Database System”. L. Ong and J. Goh. ERL Technical Memorandum M90/33. University of California. Berkeley, California. April, 1990. related link is https://www2.eecs.berkeley.edu/Pubs/TechRpts/1990/1466.html an idea: In case these external links in (https://www.postgresql.org/docs/current/biblio.html) become dead links, we can send these external pdf or html files in the mailing list for archive purposes. [1] https://www.postgresql.org/docs/current/indexes-partial.html [2] https://www.postgresql.org/docs/current/biblio.html
