Data Import
Limitations
DuckDB's Parquet encryption currently has the following limitations.  
1. It is not compatible with the encryption of, e.g., PyArrow, until the missing details are implemented.  
2. DuckDB encrypts the footer and all columns using the `footer_key`. The Parquet specification allows encryption of individual columns with different keys, e.g.:  
```sql
COPY tbl TO 'tbl.parquet'
(ENCRYPTION_CONFIG {
footer_key: 'key256',
column_keys: {key256: ['col0', 'col1']}
});
```  
However, this is unsupported at the moment and will cause an error to be thrown (for now):  
```console
Not implemented Error: Parquet encryption_config column_keys not yet implemented
```