The syscheckudrdep system catalog table describes each check constraint that is referenced by a user-defined routine (UDR) in the database. The syscheckudrdep table has the following columns.
Table 1. SYSCHECKUDRDEP table column descriptions
Column Type Explanation
udr_id INTEGER Unique code identifying the UDR
constraint_id INTEGER Unique code identifying the check constraint

Each check constraint described in the syscheckudrdep table also has its own row in the sysconstraints system catalog table, where the constrid column has the same value as the constraint_id column of syscheckudrdep.

A composite index on the udr_id and constraint_id columns requires that combinations of these values be unique.