rt_role 
Logical Entity Name  rt_role 
Default Table Name  rt_role 
Definition  This table is used to store information about the current status of the RT machine. RT System runs two machines in parallel. One is always 'primary' and another is always 'shadow'. You can find out using this table if the machine in question is primary or shadow. Whenever the status of the RT machine change from 'primary' to 'shadow' or vice versa, the entry is created in the table with the timestamp 

rt_role Columns 
ColumnName  Domain  Datatype  NULL  Definition 
primary_system    VARCHAR2(5)  YES  It stores (not enforced) two string values in the field. 'true' and 'false'. If the value is 'true', the system is primary and if the value is 'false' the system is shadow 
modification_time    DATE  YES  Time when status is updated 

rt_role Primary and Unique Keys 
Key Name  Key Type  Keys 

rt_role Foreign Keys 
Parent Relationships: 
Table Name  Type  Cardinality  Constraint Name  VerbPhrase  InversePhrase  Foreign Keys  Is Supertype  Deferrable 
Child Relationships: 
Table Name  Type  Cardinality  Constraint Name  VerbPhrase  InversePhrase  Foreign Keys  Is Subtype  Deferrable 

rt_role Check Constraints 
Check Constraint Name  CheckConstraint 
rt_role01  primary_system IN ('true', 'false', 'TRUE', 'FALSE')