| CHAR, VARCHAR2, RAW
| length of the column in the table
|
| NUMBER
| 22 (the internal length)
|
| DATE
| 7 (the internal length)
|
| LONG, LONG RAW
| 0
|
| ROWID
| (system dependent)
|
| Functions returning internal data type 1 (such as TO_CHAR())
| same as orafield.MaxDSize
|