column_privileges
   The view column_privileges identifies all
   privileges granted on columns to a currently enabled role or by a
   currently enabled role.  There is one row for each combination of
   column, grantor, and grantee.
  
   If a privilege has been granted on an entire table, it will show up in
   this view as a grant for each column, but only for the
   privilege types where column granularity is possible:
   SELECT, INSERT,
   UPDATE, REFERENCES.
  
Table 36.13. column_privileges Columns
| Name | Data Type | Description | 
|---|---|---|
| grantor | sql_identifier | Name of the role that granted the privilege | 
| grantee | sql_identifier | Name of the role that the privilege was granted to | 
| table_catalog | sql_identifier | Name of the database that contains the table that contains the column (always the current database) | 
| table_schema | sql_identifier | Name of the schema that contains the table that contains the column | 
| table_name | sql_identifier | Name of the table that contains the column | 
| column_name | sql_identifier | Name of the column | 
| privilege_type | character_data | Type of the privilege: SELECT,INSERT,UPDATE, orREFERENCES | 
| is_grantable | yes_or_no | YESif the privilege is grantable,NOif not |