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Fundamental Techniques for Order Optimization論文解讀1. 摘要 優(yōu)化器為了產(chǎn)生高效的計(jì)劃，許多優(yōu)化器會利用數(shù)據(jù)的物理排序，這些排序有可能來自索引或者sort算子。排序是一種代價(jià)很高的操作。對排序進(jìn)...
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An Overview of Query Optimization in Relational Systems 論文解讀1. 目標(biāo) 從70年代就有很多關(guān)于查詢優(yōu)化器的技術(shù)，很難用一篇短文就把這個(gè)領(lǐng)域的深度和廣度表達(dá)出來，因此這里會列出基礎(chǔ)技術(shù)和這個(gè)領(lǐng)域重要工作的采...
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calcite物化視圖基于規(guī)則查詢改寫原理解析1. 術(shù)語定義 物化視圖：將視圖的查詢結(jié)果物化保存下來的結(jié)果。物化視圖 QueryRel: 生成物化視圖的SQL關(guān)系表達(dá)式（查詢語句）。物化視圖...
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Optimizing Queries Using Materialized Views: A Practical, Scalable Solution 論文閱讀AbstractMaterialized views can provide massive improvements in queryproc...
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The Volcano Optimizer Generator: Extensibility and Efficient Search火山模型論文閱讀AbstractEmerging database application domains demand not only new functi...
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Apache Calcite: A Foundational Framework for Optimized Query Processing Over Heterogeneous Data S...摘要 Apache Calcite is a foundational software framework that provides que...