1. 21 Sep, 2007 1 commit
  2. 20 Sep, 2007 1 commit
    • Tom Lane's avatar
      HOT updates. When we update a tuple without changing any of its indexed · 282d2a03
      Tom Lane authored
      columns, and the new version can be stored on the same heap page, we no longer
      generate extra index entries for the new version.  Instead, index searches
      follow the HOT-chain links to ensure they find the correct tuple version.
      
      In addition, this patch introduces the ability to "prune" dead tuples on a
      per-page basis, without having to do a complete VACUUM pass to recover space.
      VACUUM is still needed to clean up dead index entries, however.
      
      Pavan Deolasee, with help from a bunch of other people.
      282d2a03