SYSCSTCOL
The SYSCSTCOL view records the columns on which constraints are defined. There is one row for every column in a unique, primary key, and check constraint and the referencing columns of a referential constraint.
The following table describes the columns in the SYSCSTCOL view:
| Column Name | System Column Name | Data Type | Description |
|---|---|---|---|
| TABLE_SCHEMA | TDBNAME | VARCHAR(128) | Name of the SQL schema that contains the table the constraint is dependent on. |
| TABLE_NAME | TBNAME | VARCHAR(128) | Name of the table the constraint is dependent on. This is the SQL table name if it exists; otherwise, it is the system table name. |
| COLUMN_NAME | COLUMN | VARCHAR(128) | Column that the constraint was created over. This is the SQL column name if it exists; otherwise, it is the system column name. |
| CONSTRAINT_SCHEMA | CDBNAME | VARCHAR(128) | Name of the schema of the constraint. |
| CONSTRAINT_NAME | RELNAME | VARCHAR(128) | Name of the constraint. |
| SYSTEM_COLUMN_NAME | SYS_CNAME | CHAR(10) | System name of the column. |
| SYSTEM_TABLE_NAME | SYS_TNAME | CHAR(10) | System name of the table. |
| SYSTEM_TABLE_SCHEMA | SYS_DNAME | CHAR(10) | System name of the schema containing the table. |
| SYSTEM_CONSTRAINT_SCHEMA | SYS_CDNAME | CHAR(10) | Name of the system schema containing the constraint. |