SHOW VARIABLES LIKE 'max_allowed_packet'

mysql> show variables like "max_allowed_pa
    -> ;
+--------------------+-----------+
| Variable_name      | Value     |
+--------------------+-----------+
| max_allowed_packet | 524288000 |
+--------------------+-----------+

  qFileBlob.SQL.Add('INSERT INTO attachment1 (address_id,file_blob,create_date,file_name,file_extension,description) values (:pAddressID,:pFileBlob,:pCreateDate,:pFileName,:pFileExtension,:pDescription)');
  qFileBlob.ParamByName('pAddressID').AsInteger := FAddressID;
  qFileBlob.ParamByName('pFileBlob').LoadFromFile(FName, ftBlob);
  qFileBlob.ParamByName('pCreateDate').AsDate := FCreateDate;
  qFileBlob.ParamByName('pFileName').AsString := ExtractFileName(FName);
  qFileBlob.ParamByName('pFileExtension').AsString := ExtractFileExt(FName);
  qFileBlob.ParamByName('pDescription').AsString := FDescription;