# SYSCHECKS system table

The SYSCHECKS table describes the check constraints within the current database.

The following table shows the contents of the SYSCHECKS system table.

Table 1. SYSCHECKS system table
Column Name | Type | Length | Nullable | Contents
--- | --- | --- | --- | ---
CONSTRAINTID | CHAR | 36 | false | Unique identifier for the constraint
CHECKDEFINITION | LONG VARCHAR | 32,700 | false | Text of check constraint definition
REFERENCEDCOLUMNS | org.apache.derby. catalog. ReferencedColumns This class is not part of the public API. | 2,147,483,647 | false | Description of the columns referenced by the check constraint

Parent topic: Derby system tables