Here are a few things to keep in mind when using @DiscriminatorColumn

  1. If you have used this annotation then Hibernate will automatically use the @DiscriminatorValue value from the child classes to fill the column value.
  2. Do not define the discriminator column as a regular class property. This will cause Hibernate to consider it a new column and you will see errors like The column index is out of range: n, number of columns: m..