1. 01 2月, 2004 2 次提交
  2. 30 1月, 2004 1 次提交
    • B
      Add: · 777babec
      Bruce Momjian 提交于
      <
      > * Allow libpq to return information about prepared queries
      777babec
  3. 28 1月, 2004 1 次提交
  4. 27 1月, 2004 5 次提交
  5. 26 1月, 2004 2 次提交
  6. 25 1月, 2004 8 次提交
  7. 24 1月, 2004 1 次提交
    • T
      Revise GEQO planner to make use of some heuristic knowledge about SQL, namely · 3969f292
      Tom Lane 提交于
      that it's good to join where there are join clauses rather than where there
      are not.  Also enable it to generate bushy plans at need, so that it doesn't
      fail in the presence of multiple IN clauses containing sub-joins.  These
      changes appear to improve the behavior enough that we can substantially reduce
      the default pool size and generations count, thereby decreasing the runtime,
      and yet get as good or better plans as we were getting in 7.4.  Consequently,
      adjust the default GEQO parameters.  I also modified the way geqo_effort is
      used so that it affects both population size and number of generations;
      it's now useful as a single control to adjust the GEQO runtime-vs-plan-quality
      tradeoff.  Bump geqo_threshold to 12, since even with these changes GEQO
      seems to be slower than the regular planner at 11 relations.
      3969f292
  8. 23 1月, 2004 4 次提交
  9. 22 1月, 2004 1 次提交
  10. 21 1月, 2004 3 次提交
  11. 20 1月, 2004 2 次提交
  12. 16 1月, 2004 1 次提交
  13. 14 1月, 2004 1 次提交
  14. 11 1月, 2004 4 次提交
  15. 10 1月, 2004 2 次提交
  16. 09 1月, 2004 2 次提交