https://yaooqinn.github.io/zh/tags/join-order/ Recent content in Join-Order on Kent Yao Hugo -- 0.157.0 zh-cn Mon, 25 May 2026 00:00:00 +0000 https://yaooqinn.github.io/zh/posts/spark/llm-for-join-order-an-apache-spark-perspective/ Mon, 25 May 2026 00:00:00 +0000 https://yaooqinn.github.io/zh/posts/spark/llm-for-join-order-an-apache-spark-perspective/ Databricks 与 UPenn 把 LLM agent 当成离线 join-order 调优师,在 JOB 113 条查询上拿到 P90 -41% / 几何均值 1.288× 的提速,甚至超过"完美基数估计"。从 Apache Spark 一线视角看,这件事说明了什么、又没说明什么。