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Andmelao “päringumootor”

Andmelao “päringumootor”. Janek Press Daniel Skornjakov. Andmelao “päringumootor”. Java Mysql Connector/J Mysql. Andmelao “päringumootor”. Klass “Warehouse” Klass “Engine”. Klass “Warehouse ”. Ühendus Mysql-ga Andmeladu Andmekuup Hierarhiad Päringud. Klass “Warehouse” meetodid.

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Andmelao “päringumootor”

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  1. Andmelao “päringumootor” Janek Press Daniel Skornjakov

  2. Andmelao “päringumootor” • Java • Mysql Connector/J • Mysql

  3. Andmelao “päringumootor” • Klass “Warehouse” • Klass “Engine”

  4. Klass “Warehouse ” • Ühendus Mysql-ga • Andmeladu • Andmekuup • Hierarhiad • Päringud

  5. Klass “Warehouse” meetodid • Ühendus Mysql-ga • public Warehouse(String host, String db, String user, String pass); • public Connection GetConnection() • public void Close() • public boolean IsConnected()

  6. Klass “Warehouse” meetodid • Andmeladu • CreateWarehouse(String name, String[] dims, String[][] hierarchies, String[] measures) • public boolean DropWarehouse(String name)

  7. Klass “Warehouse” meetodid • Andmekuup • public boolean CreateCube(String name, String[] dims, String[] hierarchies, String[] measures • public boolean CreateCube(String name, String[] dims, int[] hierarchies, String[] measures) • public boolean DropCubes(String name)

  8. Klass “Warehouse” meetodid • Hierarhiad • public boolean ResetHierarchies() • public boolean DeleteHierarchy(String base) • public boolean CreateHierarchy(String base, String[] levels) • public String[] GetHierarchy(String base) • public int GetHierarchyCount(String base)

  9. Klass “Warehouse” meetodid • Päringud • private int ExecSQL(String[] commands) • Näide String[] insert = new String[1]; Insert[0] = “INSERT INTO ..”; ExecSql(Insert);

  10. Klass “Engine” • public String[][] ExecuteQuery(String query);

  11. Näide Engine eng = new Engine(new Warehouse(cnfMySQL[0], cnfMySQL[1], cnfMySQL[2], cnfMySQL[3])); eng.GetWarehouse().ResetHierarchies(); String[] dims = { "aeg","asukoht","toode" }; String[][] hierarchies = { { "paev", "nadal", "kuu", "aasta" },{"maakond","linn"},null}; String[] measures = { "summa","kogus" }; eng.GetWarehouse().CreateWarehouse("myyk", dims, hierarchies, measures); eng.GetWarehouse().InsertData("data.txt"); PrintResults(eng.ExecuteQuery("SELECT aeg:nadal,asukoht:linn, summa FROMmyyk;")); PrintResults(eng.ExecuteQuery("SELECT nadal,linn, summa FROM myyk;"));

  12. Näide: tabelid • Myyk (id_aeg,id_asukoht,id_toode,summa,kogus) • Myyk_aeg (id_aeg,paev,nadal,kuu,aasta) • Myyk_asukoht (id_asukoht,maakond,linn) • Myyk_cube_aeg_asukoht (id_aeg,id_asukoht,summa,aggr_count) • Hierarchies (base,element,level)

  13. Näide: “data.txt” • INSERT INTO myyk (id_aeg,id_asukoht,id_toode,summa,kogus) values('1','1','1','1000','1') • INSERT INTO myyk (id_aeg,id_asukoht,id_toode,summa,kogus) values('1','2','1','1050','1') • INSERT INTO myyk (id_aeg,id_asukoht,id_toode,summa,kogus) values('1','2','2','1500','1') • INSERT INTO myyk (id_aeg,id_asukoht,id_toode,summa,kogus) values('1','1','3','1200','1') • INSERT INTO myyk (id_aeg,id_asukoht,id_toode,summa,kogus) values('1','2','4','2000','1') • INSERT INTO myyk (id_aeg,id_asukoht,id_toode,summa,kogus) values('2','1','4','2100','1') • INSERT INTO myyk (id_aeg,id_asukoht,id_toode,summa,kogus) values('3','2','4','1800','1') • INSERT INTO myyk (id_aeg,id_asukoht,id_toode,summa,kogus) values('2','2','2','1400','1') • INSERT INTO myyk (id_aeg,id_asukoht,id_toode,summa,kogus) values('3','1','2','5000','5') • INSERT INTO myyk_toode values('1','Protsessor AMD') • INSERT INTO myyk_toode values('2','Protsessor Intel') • INSERT INTO myyk_toode values('3','Protsessor Celeron') • INSERT INTO myyk_toode values('4','Emaplaat Asus') • INSERT INTO myyk_aeg (id_aeg,paev,nadal,kuu,aasta) values('1','10','2','30','4') • INSERT INTO myyk_aeg (id_aeg,paev,nadal,kuu,aasta) values('2','5','3','40','4') • INSERT INTO myyk_aeg (id_aeg,paev,nadal,kuu,aasta) values('3','10','2','41','4') • INSERT INTO myyk_asukoht values('1','Tartumaa','Tartu') • INSERT INTO myyk_asukoht values('2','Harjumaa','Tallinn')

  14. Päring Sql’le • SELECT myyk_aeg.nadal AS nadal, myyk_asukoht.linn AS linn, SUM(myyk_cube_aeg_asukoht.summa) AS summa FROM myyk_cube_aeg_asukoht,myyk_aeg,myyk_asukoht WHERE myyk_cube_aeg_asukoht.id_aeg=myyk_aeg.id_aeg AND myyk_cube_aeg_asukoht.id_asukoht=myyk_asukoht.id_asukoht GROUP BY myyk_aeg.nadal, myyk_asukoht.linn

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