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If no collection table is specifically mapped and an entity name is specified (via @Entity(name="...") , the table name generated for @ElementCollection starts with its (unqualified) owning entity class name. It should start with the mapped entity name instead.
For example:
@Entity(name="Mtx")
public class Matrix { @Id private Integer id; @ElementCollection private Set<Integer> mvalues = new HashSet<Integer>(); }
Currently, the collection table is named "Matrix_mvalues"; it should be "Mtx_mvalues".
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