36.15. 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 |