PRIMARY_KEYS
Provides primary key information.
	Provides primary key information.
| Column Name | Data Type | Description | 
|---|---|---|
| CONSTRAINT_ID | INTEGER | A unique numeric ID assigned by the Vertica catalog, which identifies the constraint. | 
| CONSTRAINT_NAME | VARCHAR | The constraint name for which information is listed. | 
| COLUMN_NAME | VARCHAR | The column name for which information is listed. | 
| ORDINAL_POSITION | VARCHAR | The position of the column within the key. The numbering of columns starts at 1. | 
| TABLE_NAME | VARCHAR | The table name for which information is listed. | 
| CONSTRAINT_TYPE | VARCHAR | The constraint type, p, for primary key. | 
| IS_ENABLED` | BOOLEAN | Indicates if a table column constraint for a PRIMARY KEY is enabled by default. Can be t (True) or f (False). | 
| TABLE_SCHEMA | VARCHAR | The schema name for which information is listed. |