Hibernate Query Language Hibernate Query Language and Native

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Pagination// retrieve initial page, up to 50 recordsQuery getAccountsPage1 =session.createQuery("from Account").setMaxResult(50);...// retrieve subsequent pages, passing// in the first record to start withQuery getAccountsNextPage =session.createQuery("from Account").setFirstResult(:startingIndex).setMaxResult(50);Setting Timeout• Set the time allowed for aspecified query to execute– setTimeout(int second);– Hibernate will throw an exception if limitis exceeded• Based on the JDBC timeoutimplementation
Setting Timeouttry {// retrieve accounts, allow 30 secondsQuery getAccounts =session.createQuery("from Account").setTimeout(30);List accounts = getAccountsPage1.list();}catch (HibernateException) {...}...Setting Fetch Size• Optimization hint leveraged by theJDBC driver– Not supported by all vendors, but if available,Hibernate will user this to optimize data retrieval• Used to indicate the number of recordsexpected to be obtained in a readaction– If paging, should set to page size
Page 2 and 3: Topics in This Section• Spend som
Page 4 and 5: Basic Object Queries// return all C
Page 6 and 7: Setting Parameters Generically// re
Page 10 and 11: Setting Fetch Size// retrieve initi
Page 12 and 13: Combined SettingsQuery getAccountPa
Page 14 and 15: Calling Externalizing Queries// glo
Page 16 and 17: Using SQL/Database FunctionsQuery g
Page 18 and 19: EBill issued from EBiller...courses
Page 20 and 21: Ordinary Join -Return One TypeQuery
Page 22 and 23: Left Outer JoinQuery getEBills =ses
Page 24 and 25: Theta-Style JoinQuery getVisaCardEm
Page 26 and 27: Min, Max, and Avg FunctionsQuery ac
Page 28 and 29: © 2009 coreservlets.comNative SQLC
Page 30 and 31: Returning Scalar Values -Projection
Page 32: Preview of Next Sections• Hiberna

Hibernate Query Language Hibernate Query Language and Native

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