http://200yi.com/ff_internal/ 2026-04-28T01:14:54+0800 http://200yi.com/ff_internal/ http://200yi.com/ff_internal/lib/tpl/mnml-blog/images/favicon.ico text/html 2023-06-17T21:25:18+0800 Anonymous (anonymous@undisclosed.example.com) http://200yi.com/ff_internal/wiki.php?id=wiki:Database:ORCA:GPORCA%E5%AE%98%E6%96%B9%E6%96%87%E6%A1%A3&rev=1687008318&do=diff 参考 * GPORCA源码仓库 * GPORCA Document * GPORCA中文文档 text/html 2023-06-17T21:25:18+0800 Anonymous (anonymous@undisclosed.example.com) http://200yi.com/ff_internal/wiki.php?id=wiki:Database:ORCA:orca%E6%89%A7%E8%A1%8C%E8%AE%A1%E5%88%92%E8%A7%A3%E8%AF%BB&rev=1687008318&do=diff ORCA执行计划解读 ORCA优化器以XML格式输出执行计划信息。 可以在以下位置找到： ${BASE}/userdata/gbase/minidumps/ 文件以执行时间为序。 示例： select sum(t1.a) from t11 t1 join t11 t2 on t1.a = t2.a where t1.a > 4;