Johanna questions

Johanna answers

• Understanding the optimistic locking StaleObjectStateException
• Selecting collections in HQL
• Hibernate can't instantiate id generator in Spring project with multiple data sources
• How to define a ManyToOne relationship between two abstract classes
• HQL query for searching (one to many relation)
• Bad File Descriptor IOException in Java using javax.xml
• Order by (chained) column which can be null
• How to change the ordering of sql execution in hibernate
• org.hibernate.StaleStateException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1
• java.sql.SQLException: Parameter index out of range (3 > number of parameters, which is 2)