04d2ec49__Multi_Tenancy____Eclipsepedia_DiscriminatorColumn_Attributes_Default
[Attribute] columnDefinition [Description] The SQL fragment that is used when generating the DDL for the discriminator column. [Required?] No [Default] 
The provider-generated SQL to create a column of the specified discriminator type.
Difference between revisions of "EclipseLink/UserGuide/JPA/Advanced JPA Development/Single-Table Multi-Tenancy" - Eclipsepedia