使用Projections.rowCount（）进行休眠条件查询会导致数值溢出

Question

I'm using Oracle 11g R2. I have a table with 9.1 billion rows. When I try to run a criteria query which contains Projections.rowCount() (which I need to do to get the number of rows in the table) using either .list() or .uniqueResult() , I get a Numeric Overflow exception.

The relevant part of the stack trace:

java.sql.SQLException: Numeric Overflow
  oracle.jdbc.driver.NumberCommonAcessor?throwOverFlow
  oracle.jdbc.driver.NumberCommonAcessor?getInt
  oracle.jdbc.driver.OracleResultSetImpl?getInt
  oracle.jdbc.driver.OracleResultSet?getInt
  org.hibernate.type.IntegerType?get  <---------------- oops.
  org.hibernate.type.NullableType?nullSafeGet
  org.hibernate.type.NullableType?nullSafeGet
  org.hibernate.loader.criteria.CriteriaLoader?getResultColumnOrRow
  org.hibernate.loader.Loader.getRowFromResultSet
  org.hibernate.loader.Loader.doQuery
  org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections
  org.hibernate.loader.Loader.doList
  org.hibernate.loader.Loader.listIgnoreQueryCache
  org.hibernate.loader.Loader.list
  org.hibernate.loader.criteria.CriteriaLoader?list
  org.hibernate.impl.SessionImpl?.list
  org.hibernate.impl.CriteriaImpl?.list
  mypackage.myclass.GetRowCount

Hibernate is deciding to use an Integer to store the result regardless of the table size. How can I override this behaviour?

Answer 1

使用SQLProjection ，其返回Type足够大以适合您的结果。