Cách nhanh nhất để xóa nhiều đối tượng trong Hibernate

Question

Tôi đang sử dụng Hibernate để xóa đối tượng có hai cấp độ tầng và vấn đề của tôi là RẤT chậm khi tôi truy vấn đối tượng và sau đó xóa và tôi muốn xem nếu có một cách nhanh hơn. Mã của tôi, mất khoảng 15-30 giây để xóa 15 Statement đối tượng trông như thế này:

public void deleteStatement(Long batchId) { 
    List<Statement> statements = session.createQuery("from Statement where batchId = ?").setParameter(0, batchId).list(); 
    for(Statement statement : statements) { 
     session.delete(statement); 
     logger.debug("Deleted statement"); 
    } 
} 

Tôi biết tôi chỉ có thể làm:

session.createQuery("delete from Statement where batchId = ?").setParameter(0, batchId).executeUpdate(); 

nhưng vấn đề là các thác xóa không xảy ra với phương pháp này. Có một cách hiệu quả để xóa các đối tượng của tôi và vẫn còn có thác xảy ra, hoặc là có cái gì tôi đang làm sai?

Cảm ơn sự giúp đỡ!

Cập nhật
Để trả lời davidfrancis, đây là một diễn giải của SQL mà ngủ đông tạo ra. Thật điên rồ và hàng ngàn dòng dài, tin hay không !! Lưu ý, đối tượng tên miền của tôi, Statement, chứa tập hợp Invoice, chứa tập hợp Transaction. Tôi lười tải tất cả các bộ sưu tập của tôi, btw. Lần đầu tiên có rất nhiều hồi dữ liệu, trong đó, tôi tin rằng sẽ xảy ra với các lựa chọn truy vấn HQL:

org.hibernate.hql.ast.QueryTranslatorImpl - HQL: from com.myapp.domain.cc.Statement where batchId = ? 
org.hibernate.hql.ast.QueryTranslatorImpl - SQL: select statement0_.id as id2_, statement0_.batchId as batchId2_ from statement statement0_ where batchId=? 
org.hibernate.loader.Loader - result row: EntityKey[com.myapp.domain.cc.Statement#393] 
org.hibernate.loader.Loader - result row: EntityKey[com.myapp.domain.cc.Statement#394] 
... 
org.hibernate.SQL - select invoices0_.statementId as stateme12_2_1_, invoices0_.id as id1_, invoices0_.id as id3_0_, invoices0_.statementId as stateme12_3_0_ from invoice invoices0_ where invoices0_.statementId=? 
org.hibernate.loader.Loader - result row: EntityKey[com.myapp.domain.cc.Invoice#48987] 
org.hibernate.loader.Loader - found row of collection: [com.myapp.domain.cc.Statement.invoices#393] 
org.hibernate.loader.Loader - result row: EntityKey[com.myapp.domain.cc.Invoice#48988] 
org.hibernate.loader.Loader - found row of collection: [com.myapp.domain.cc.Statement.invoices#393] 
... 
org.hibernate.SQL - select transactio0_.invoiceId as invoiceId3_1_, transactio0_.id as id1_, transactio0_.id as id4_0_, transactio0_.invoiceId as invoiceId4_0_ from transactions transactio0_ where transactio0_.invoiceId=? 
org.hibernate.loader.Loader - result row: EntityKey[com.myapp.domain.cc.Transaction#306534] 
org.hibernate.loader.Loader - found row of collection: [com.myapp.domain.cc.Invoice.transactions#48996] 
... 

Bây giờ, việc xóa:

org.hibernate.persister.entity.AbstractEntityPersister - Static SQL for entity: com.aa.itfs.mcla.domain.cc.Transaction 
org.hibernate.persister.entity.AbstractEntityPersister - Version select: select id from transactions where id =? 
org.hibernate.persister.entity.AbstractEntityPersister - Snapshot select: select transactio_.id, transactio_.ccNumber as ccNumber4_, transactio_.approvalCode as approval3_4_, transactio_.saleAmount as saleAmount4_, transactio_.installmentNumber as installm5_4_, transactio_.numberOfInstallments as numberOf6_4_ from transactions transactio_ where transactio_.id=? 
org.hibernate.persister.entity.AbstractEntityPersister - Insert 0: insert into transactions (ccNumber, approvalCode, saleAmount, installmentNumber, numberOfInstallments, invoiceId, id) values (?, ?, ?, ?, ?, ?, ?) 
org.hibernate.persister.entity.AbstractEntityPersister - Update 0: update transactions set ccNumber=?, approvalCode=?, saleAmount=?, installmentNumber=?, numberOfInstallments=? where id=? 
org.hibernate.persister.entity.AbstractEntityPersister - Delete 0: delete from transactions where id=? 
org.hibernate.persister.entity.AbstractEntityPersister - Identity insert: insert into transactions (ccNumber, approvalCode, saleAmount, installmentNumber, numberOfInstallments, invoiceId) values (?, ?, ?, ?, ?, ?) 
org.hibernate.persister.entity.AbstractEntityPersister - Static SQL for entity: com.myapp.domain.cc.Statement 
org.hibernate.persister.entity.AbstractEntityPersister - Version select: select id from statement where id =? 
org.hibernate.persister.entity.AbstractEntityPersister - Snapshot select: select statement_.id, statement_.statementNumber as statemen2_2_, statement_.filename as filename2_, statement_.statementType as statemen4_2_ from statement statement_ where statement_.id=? 
org.hibernate.persister.entity.AbstractEntityPersister - Insert 0: insert into statement (statementNumber, filename, statementType, batchId, id) values (?, ?, ?, ?, ?) 
org.hibernate.persister.entity.AbstractEntityPersister - Update 0: update statement set statementNumber=?, filename=?, statementType=? where id=? 
org.hibernate.persister.entity.AbstractEntityPersister - Delete 0: delete from statement where id=? 
org.hibernate.persister.entity.AbstractEntityPersister - Identity insert: insert into statement (statementNumber, filename, statementType, batchId) values (?, ?, ?, ?) 
org.hibernate.persister.collection.AbstractCollectionPersister - Static SQL for collection: com.myapp.domain.cc.Statement.invoices 
org.hibernate.persister.collection.AbstractCollectionPersister - Row insert: update invoice set statementId=? where id=? 
org.hibernate.persister.collection.AbstractCollectionPersister - Row delete: update invoice set statementId=null where statementId=? and id=? 
org.hibernate.persister.collection.AbstractCollectionPersister - One-shot delete: update invoice set statementId=null where statementId=? 
org.hibernate.persister.collection.AbstractCollectionPersister - Static SQL for collection: com.myapp.domain.cc.Invoice.transactions 
org.hibernate.persister.collection.AbstractCollectionPersister - Row insert: update transactions set invoiceId=? where id=? 
org.hibernate.persister.collection.AbstractCollectionPersister - Row delete: update transactions set invoiceId=null where invoiceId=? and id=? 
org.hibernate.persister.collection.AbstractCollectionPersister - One-shot delete: update transactions set invoiceId=null where invoiceId=?  

Lựa chọn ngẫu nhiên ....

org.hibernate.loader.entity.EntityLoader - Static select for entity com.myapp.domain.cc.Invoice [NONE]: select invoice0_.id as id3_0_, invoice0_.invoiceNumber as invoiceN2_3_0_, invoice0_.merchantNumber as merchant3_3_0_, invoice0_.installmentNumber as installm4_3_0_, invoice0_.saleDate as saleDate3_0_, invoice0_.paymentDate as paymentD6_3_0_, invoice0_.amount as amount3_0_, invoice0_.amountType as amountType3_0_, invoice0_.saleType as saleType3_0_, invoice0_.ccType as ccType3_0_, invoice0_.statementType as stateme11_3_0_, invoice0_.statementId as stateme12_3_0_ from invoice invoice0_ where invoice0_.id=? 
org.hibernate.loader.entity.EntityLoader - Static select for entity com.myapp.domain.cc.Invoice [READ]: select invoice0_.id as id3_0_, invoice0_.invoiceNumber as invoiceN2_3_0_, invoice0_.merchantNumber as merchant3_3_0_, invoice0_.installmentNumber as installm4_3_0_, invoice0_.saleDate as saleDate3_0_, invoice0_.paymentDate as paymentD6_3_0_, invoice0_.amount as amount3_0_, invoice0_.amountType as amountType3_0_, invoice0_.saleType as saleType3_0_, invoice0_.ccType as ccType3_0_, invoice0_.statementType as stateme11_3_0_, invoice0_.statementId as stateme12_3_0_ from invoice invoice0_ where invoice0_.id=? 
org.hibernate.loader.entity.EntityLoader - Static select for entity com.myapp.domain.cc.Invoice [UPGRADE]: select invoice0_.id as id3_0_, invoice0_.invoiceNumber as invoiceN2_3_0_, invoice0_.merchantNumber as merchant3_3_0_, invoice0_.installmentNumber as installm4_3_0_, invoice0_.saleDate as saleDate3_0_, invoice0_.paymentDate as paymentD6_3_0_, invoice0_.amount as amount3_0_, invoice0_.amountType as amountType3_0_, invoice0_.saleType as saleType3_0_, invoice0_.ccType as ccType3_0_, invoice0_.statementType as stateme11_3_0_, invoice0_.statementId as stateme12_3_0_ from invoice invoice0_ with (updlock, rowlock) where invoice0_.id=? 
org.hibernate.loader.entity.EntityLoader - Static select for entity com.myapp.domain.cc.Invoice [UPGRADE_NOWAIT]: select invoice0_.id as id3_0_, invoice0_.invoiceNumber as invoiceN2_3_0_, invoice0_.merchantNumber as merchant3_3_0_, invoice0_.installmentNumber as installm4_3_0_, invoice0_.saleDate as saleDate3_0_, invoice0_.paymentDate as paymentD6_3_0_, invoice0_.amount as amount3_0_, invoice0_.amountType as amountType3_0_, invoice0_.saleType as saleType3_0_, invoice0_.ccType as ccType3_0_, invoice0_.statementType as stateme11_3_0_, invoice0_.statementId as stateme12_3_0_ from invoice invoice0_ with (updlock, rowlock) where invoice0_.id=? 
org.hibernate.loader.entity.EntityLoader - Static select for entity com.myapp.domain.cc.Invoice [FORCE]: select invoice0_.id as id3_0_, invoice0_.invoiceNumber as invoiceN2_3_0_, invoice0_.merchantNumber as merchant3_3_0_, invoice0_.installmentNumber as installm4_3_0_, invoice0_.saleDate as saleDate3_0_, invoice0_.paymentDate as paymentD6_3_0_, invoice0_.amount as amount3_0_, invoice0_.amountType as amountType3_0_, invoice0_.saleType as saleType3_0_, invoice0_.ccType as ccType3_0_, invoice0_.statementType as stateme11_3_0_, invoice0_.statementId as stateme12_3_0_ from invoice invoice0_ where invoice0_.id=? 
org.hibernate.loader.entity.EntityLoader - Static select for entity com.myapp.domain.cc.Invoice [PESSIMISTIC_READ]: select invoice0_.id as id3_0_, invoice0_.invoiceNumber as invoiceN2_3_0_, invoice0_.merchantNumber as merchant3_3_0_, invoice0_.installmentNumber as installm4_3_0_, invoice0_.saleDate as saleDate3_0_, invoice0_.paymentDate as paymentD6_3_0_, invoice0_.amount as amount3_0_, invoice0_.amountType as amountType3_0_, invoice0_.saleType as saleType3_0_, invoice0_.ccType as ccType3_0_, invoice0_.statementType as stateme11_3_0_, invoice0_.statementId as stateme12_3_0_ from invoice invoice0_ with (holdlock, rowlock) where invoice0_.id=? 
org.hibernate.loader.entity.EntityLoader - Static select for entity com.myapp.domain.cc.Invoice [PESSIMISTIC_WRITE]: select invoice0_.id as id3_0_, invoice0_.invoiceNumber as invoiceN2_3_0_, invoice0_.merchantNumber as merchant3_3_0_, invoice0_.installmentNumber as installm4_3_0_, invoice0_.saleDate as saleDate3_0_, invoice0_.paymentDate as paymentD6_3_0_, invoice0_.amount as amount3_0_, invoice0_.amountType as amountType3_0_, invoice0_.saleType as saleType3_0_, invoice0_.ccType as ccType3_0_, invoice0_.statementType as stateme11_3_0_, invoice0_.statementId as stateme12_3_0_ from invoice invoice0_ with (updlock, rowlock) where invoice0_.id=? 
org.hibernate.loader.entity.EntityLoader - Static select for entity com.myapp.domain.cc.Invoice [PESSIMISTIC_FORCE_INCREMENT]: select invoice0_.id as id3_0_, invoice0_.invoiceNumber as invoiceN2_3_0_, invoice0_.merchantNumber as merchant3_3_0_, invoice0_.installmentNumber as installm4_3_0_, invoice0_.saleDate as saleDate3_0_, invoice0_.paymentDate as paymentD6_3_0_, invoice0_.amount as amount3_0_, invoice0_.amountType as amountType3_0_, invoice0_.saleType as saleType3_0_, invoice0_.ccType as ccType3_0_, invoice0_.statementType as stateme11_3_0_, invoice0_.statementId as stateme12_3_0_ from invoice invoice0_ where invoice0_.id=? 
org.hibernate.loader.entity.EntityLoader - Static select for entity com.myapp.domain.cc.Invoice [OPTIMISTIC]: select invoice0_.id as id3_0_, invoice0_.invoiceNumber as invoiceN2_3_0_, invoice0_.merchantNumber as merchant3_3_0_, invoice0_.installmentNumber as installm4_3_0_, invoice0_.saleDate as saleDate3_0_, invoice0_.paymentDate as paymentD6_3_0_, invoice0_.amount as amount3_0_, invoice0_.amountType as amountType3_0_, invoice0_.saleType as saleType3_0_, invoice0_.ccType as ccType3_0_, invoice0_.statementType as stateme11_3_0_, invoice0_.statementId as stateme12_3_0_ from invoice invoice0_ where invoice0_.id=? 
org.hibernate.loader.entity.EntityLoader - Static select for entity com.myapp.domain.cc.Invoice [OPTIMISTIC_FORCE_INCREMENT]: select invoice0_.id as id3_0_, invoice0_.invoiceNumber as invoiceN2_3_0_, invoice0_.merchantNumber as merchant3_3_0_, invoice0_.installmentNumber as installm4_3_0_, invoice0_.saleDate as saleDate3_0_, invoice0_.paymentDate as paymentD6_3_0_, invoice0_.amount as amount3_0_, invoice0_.amountType as amountType3_0_, invoice0_.saleType as saleType3_0_, invoice0_.ccType as ccType3_0_, invoice0_.statementType as stateme11_3_0_, invoice0_.statementId as stateme12_3_0_ from invoice invoice0_ where invoice0_.id=? 
org.hibernate.loader.entity.EntityLoader - Static select for action ACTION_MERGE on entity com.myapp.domain.cc.Invoice: select invoice0_.id as id3_0_, invoice0_.invoiceNumber as invoiceN2_3_0_, invoice0_.merchantNumber as merchant3_3_0_, invoice0_.installmentNumber as installm4_3_0_, invoice0_.saleDate as saleDate3_0_, invoice0_.paymentDate as paymentD6_3_0_, invoice0_.amount as amount3_0_, invoice0_.amountType as amountType3_0_, invoice0_.saleType as saleType3_0_, invoice0_.ccType as ccType3_0_, invoice0_.statementType as stateme11_3_0_, invoice0_.statementId as stateme12_3_0_ from invoice invoice0_ where invoice0_.id=? 
org.hibernate.loader.entity.EntityLoader - Static select for action ACTION_REFRESH on entity com.myapp.domain.cc.Invoice: select invoice0_.id as id3_0_, invoice0_.invoiceNumber as invoiceN2_3_0_, invoice0_.merchantNumber as merchant3_3_0_, invoice0_.installmentNumber as installm4_3_0_, invoice0_.saleDate as saleDate3_0_, invoice0_.paymentDate as paymentD6_3_0_, invoice0_.amount as amount3_0_, invoice0_.amountType as amountType3_0_, invoice0_.saleType as saleType3_0_, invoice0_.ccType as ccType3_0_, invoice0_.statementType as stateme11_3_0_, invoice0_.statementId as stateme12_3_0_ from invoice invoice0_ where invoice0_.id=? 
org.hibernate.loader.entity.EntityLoader - Static select for entity com.myapp.domain.cc.Transaction [NONE]: select transactio0_.id as id4_0_, transactio0_.ccNumber as ccNumber4_0_, transactio0_.approvalCode as approval3_4_0_, transactio0_.saleAmount as saleAmount4_0_, transactio0_.installmentNumber as installm5_4_0_, transactio0_.numberOfInstallments as numberOf6_4_0_, transactio0_.invoiceId as invoiceId4_0_ from transactions transactio0_ where transactio0_.id=? 
org.hibernate.loader.entity.EntityLoader - Static select for entity com.myapp.domain.cc.Transaction [READ]: select transactio0_.id as id4_0_, transactio0_.ccNumber as ccNumber4_0_, transactio0_.approvalCode as approval3_4_0_, transactio0_.saleAmount as saleAmount4_0_, transactio0_.installmentNumber as installm5_4_0_, transactio0_.numberOfInstallments as numberOf6_4_0_, transactio0_.invoiceId as invoiceId4_0_ from transactions transactio0_ where transactio0_.id=? 
org.hibernate.loader.entity.EntityLoader - Static select for entity com.myapp.domain.cc.Transaction [UPGRADE]: select transactio0_.id as id4_0_, transactio0_.ccNumber as ccNumber4_0_, transactio0_.approvalCode as approval3_4_0_, transactio0_.saleAmount as saleAmount4_0_, transactio0_.installmentNumber as installm5_4_0_, transactio0_.numberOfInstallments as numberOf6_4_0_, transactio0_.invoiceId as invoiceId4_0_ from transactions transactio0_ with (updlock, rowlock) where transactio0_.id=? 
org.hibernate.loader.entity.EntityLoader - Static select for entity com.myapp.domain.cc.Transaction [UPGRADE_NOWAIT]: select transactio0_.id as id4_0_, transactio0_.ccNumber as ccNumber4_0_, transactio0_.approvalCode as approval3_4_0_, transactio0_.saleAmount as saleAmount4_0_, transactio0_.installmentNumber as installm5_4_0_, transactio0_.numberOfInstallments as numberOf6_4_0_, transactio0_.invoiceId as invoiceId4_0_ from transactions transactio0_ with (updlock, rowlock) where transactio0_.id=? 
org.hibernate.loader.entity.EntityLoader - Static select for entity com.myapp.domain.cc.Transaction [FORCE]: select transactio0_.id as id4_0_, transactio0_.ccNumber as ccNumber4_0_, transactio0_.approvalCode as approval3_4_0_, transactio0_.saleAmount as saleAmount4_0_, transactio0_.installmentNumber as installm5_4_0_, transactio0_.numberOfInstallments as numberOf6_4_0_, transactio0_.invoiceId as invoiceId4_0_ from transactions transactio0_ where transactio0_.id=? 
org.hibernate.loader.entity.EntityLoader - Static select for entity com.myapp.domain.cc.Transaction [PESSIMISTIC_READ]: select transactio0_.id as id4_0_, transactio0_.ccNumber as ccNumber4_0_, transactio0_.approvalCode as approval3_4_0_, transactio0_.saleAmount as saleAmount4_0_, transactio0_.installmentNumber as installm5_4_0_, transactio0_.numberOfInstallments as numberOf6_4_0_, transactio0_.invoiceId as invoiceId4_0_ from transactions transactio0_ with (holdlock, rowlock) where transactio0_.id=? 
org.hibernate.loader.entity.EntityLoader - Static select for entity com.myapp.domain.cc.Transaction [PESSIMISTIC_WRITE]: select transactio0_.id as id4_0_, transactio0_.ccNumber as ccNumber4_0_, transactio0_.approvalCode as approval3_4_0_, transactio0_.saleAmount as saleAmount4_0_, transactio0_.installmentNumber as installm5_4_0_, transactio0_.numberOfInstallments as numberOf6_4_0_, transactio0_.invoiceId as invoiceId4_0_ from transactions transactio0_ with (updlock, rowlock) where transactio0_.id=? 
org.hibernate.loader.entity.EntityLoader - Static select for entity com.myapp.domain.cc.Transaction [PESSIMISTIC_FORCE_INCREMENT]: select transactio0_.id as id4_0_, transactio0_.ccNumber as ccNumber4_0_, transactio0_.approvalCode as approval3_4_0_, transactio0_.saleAmount as saleAmount4_0_, transactio0_.installmentNumber as installm5_4_0_, transactio0_.numberOfInstallments as numberOf6_4_0_, transactio0_.invoiceId as invoiceId4_0_ from transactions transactio0_ where transactio0_.id=? 
org.hibernate.loader.entity.EntityLoader - Static select for entity com.myapp.domain.cc.Transaction [OPTIMISTIC]: select transactio0_.id as id4_0_, transactio0_.ccNumber as ccNumber4_0_, transactio0_.approvalCode as approval3_4_0_, transactio0_.saleAmount as saleAmount4_0_, transactio0_.installmentNumber as installm5_4_0_, transactio0_.numberOfInstallments as numberOf6_4_0_, transactio0_.invoiceId as invoiceId4_0_ from transactions transactio0_ where transactio0_.id=? 
org.hibernate.loader.entity.EntityLoader - Static select for entity com.myapp.domain.cc.Transaction [OPTIMISTIC_FORCE_INCREMENT]: select transactio0_.id as id4_0_, transactio0_.ccNumber as ccNumber4_0_, transactio0_.approvalCode as approval3_4_0_, transactio0_.saleAmount as saleAmount4_0_, transactio0_.installmentNumber as installm5_4_0_, transactio0_.numberOfInstallments as numberOf6_4_0_, transactio0_.invoiceId as invoiceId4_0_ from transactions transactio0_ where transactio0_.id=? 
org.hibernate.loader.entity.EntityLoader - Static select for action ACTION_MERGE on entity com.myapp.domain.cc.Transaction: select transactio0_.id as id4_0_, transactio0_.ccNumber as ccNumber4_0_, transactio0_.approvalCode as approval3_4_0_, transactio0_.saleAmount as saleAmount4_0_, transactio0_.installmentNumber as installm5_4_0_, transactio0_.numberOfInstallments as numberOf6_4_0_, transactio0_.invoiceId as invoiceId4_0_ from transactions transactio0_ where transactio0_.id=? 
org.hibernate.loader.entity.EntityLoader - Static select for action ACTION_REFRESH on entity com.myapp.domain.cc.Transaction: select transactio0_.id as id4_0_, transactio0_.ccNumber as ccNumber4_0_, transactio0_.approvalCode as approval3_4_0_, transactio0_.saleAmount as saleAmount4_0_, transactio0_.installmentNumber as installm5_4_0_, transactio0_.numberOfInstallments as numberOf6_4_0_, transactio0_.invoiceId as invoiceId4_0_ from transactions transactio0_ where transactio0_.id=? 
... 

Xin lỗi vì sự lộn xộn! Hỏi và bạn sẽ nhận được :)

Answer 1

Cách nhanh nhất là thực hiện xóa theo cách thủ công. Bạn sẽ phải sử dụng các câu lệnh xóa riêng biệt cho mỗi trẻ em thay vì dựa vào thác. Bạn cũng sẽ cần phải xóa các trẻ em đầu tiên để tránh tạm thời vi phạm các mối quan hệ chính nước ngoài.

Hoặc bạn có thể tăng tốc độ bằng cách sử dụng tìm nạp proxy. Có khả năng phần lớn thời gian được dành để tìm nạp dữ liệu không cần thiết. Khi bạn sử dụng tìm nạp proxy Hibernate sẽ chỉ tìm nạp các id và tạo các đối tượng proxy sẽ tự khởi tạo ngay lần đầu tiên chúng được sử dụng. Tuy nhiên kể từ khi bạn xóa chúng ngay lập tức, chúng không cần phải được khởi tạo.