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Second Project Implementation of B+Tree CSED421: Database Systems Labs.

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Presentation on theme: "Second Project Implementation of B+Tree CSED421: Database Systems Labs."— Presentation transcript:

1 Second Project Implementation of B+Tree CSED421: Database Systems Labs

2 DBMS is..  A gigantic software package combining all these modules! Query Optimization and Execution Relational Operator Evaluator Files and Access Methods Buffer Management Disk Space Management DBMS

3 Source codes  8 cpp files main.cpp, btreetest.cpp, sortedpage.cpp, btleaf.cpp, btindex.cpp, btfilescan.cpp, btfile.cpp Only need to put more source codes for one file (btfile.cpp)  You may add some source codes to the other files

4 Source codes class BTreeFile: public IndexFile { { public: friend class BTreeFileScan; BTreeFile(Status& status, const char *filename); ~BTreeFile(); Status DestroyFile(); Status Insert(const int key, const RecordID rid); Status Delete(const int key, const RecordID rid); IndexFileScan *OpenScan(const int *lowKey, const int *highKey); Status Print(); Status DumpStatistics(); private: // page id of root node PageID rootPid; // Statistics variables int numIndexNode, numLeafNode; // number of index nodes, leaf nodes int numIndexEntry, numLeafEntry; // number of index entries, leaf entries int minLeaf, maxLeaf; // minimum fill factor, maximum fill factor int height; // height of B+ tree int Calculate(PageID pid); };

5 Results  insert 1 20 / delete 1 5 / scan -1 -1

6 Results (cont.)  print / stats

7 Source codes  Visual studio 2005 환경  Lab 2010 홈페이지에서 다운로드 http://ids.postech.ac.kr/dblab2010 질문 및 답변은 Lab 게시판을 참고 Textbook Chapter 10 참고  Insert : 349 페이지 Pseudo-code  Delete : 353 페이지 Pseudo-code

8 Submission & Deadline  제출 소스코드  이름.zip 형식으로 제출  다른 코드 수정 시 수정한 이유와 파일 수정에 대해 서술할 것. 보고서 (10 장 이내 )  각 구현한 함수에 대한 간략한 서술  Test 결과에 대한 설명 및 분석  제출기한 2010 년 6 월 11 일 or 18 일 금요일 PM 18:00 공학 2 동 306 호 늦게 제출시 패널티 (-20%) 있음

9 Q&A  Enjoy getting your hands dirty!!


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