The RDF-3X engine for scalable management of RDF data----part2
本文由學者Thomas Neumann和Gerhard Weikum於2009/09/01在《The VLDB Journal 》聯合發表 原文下載鏈接文末自取 選擇性估計： 查詢優化器依靠成本模型查找成本最低的執行計劃，由於估計的基數及選擇性對計劃生成影響巨大，所以提出如下兩種統計方法： 專用直方圖，可處理任何類型的三重模式和聯接，缺點是假設謂詞間具有獨立性，則謂詞不包含在緊密耦合的三元模式。
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相關文章
- 1. Unreal Engine Plugin management
- 2. The Engine Document of JustWeEngine
- 3. Intel Management Engine, Explained: The Tiny Computer Inside Your CPU
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- 5. The Best Open Source Game Engine: In Search Of Perfection
- 6. The Role of AI Planning in the Management of Future Internet(review)
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- 10. An Overview of the Tesseract OCR Engine譯文