资料论文https://www.cse.iitb.ac.in/infolab/Data/Courses/CS632/Papers/Volcano-graefe.pdfhttps://15721.courses.cs.cmu.edu/spring2018/papers/15-optimizer1/graefe-ieee1995.pdf 博客https://www.querifylabs.com/blog?b76b044d_page=1
