This system table contains information about constraints of tables to which the current user has access. All users have access to the table.
| Column Name | Description | 
|---|---|
| CONSTRAINT_SCHEMA | Associated schema | 
| CONSTRAINT_TABLE | Associated table | 
| CONSTRAINT_TYPE | Constraint type ( PRIMARY KEY, FOREIGN KEY or NOT
NULL) | 
| CONSTRAINT_NAME | Name of the constraint | 
| CONSTRAINT_ENABLED | Displays whether the constraint is checked or not | 
| CONSTRAINT_OWNER | Owner of the constraint (which is the owner of the table) |