1. 26 Mar, 2000 3 commits
  2. 25 Mar, 2000 8 commits
  3. 24 Mar, 2000 10 commits
  4. 23 Mar, 2000 18 commits
  5. 22 Mar, 2000 1 commit
    • Tom Lane's avatar
      Repair logic flaw in cost estimator: cost_nestloop() was estimating CPU · 1d5e7a6f
      Tom Lane authored
      costs using the inner path's parent->rows count as the number of tuples
      processed per inner scan iteration.  This is wrong when we are using an
      inner indexscan with indexquals based on join clauses, because the rows
      count in a Relation node reflects the selectivity of the restriction
      clauses for that rel only.  Upshot was that if join clause was very
      selective, we'd drastically overestimate the true cost of the join.
      Fix is to calculate correct output-rows estimate for an inner indexscan
      when the IndexPath node is created and save it in the path node.
      Change of path node doesn't require initdb, since path nodes don't
      appear in saved rules.
      1d5e7a6f