Returns the Oracle data type name of the column on
the cursor.
The returned type will be one of the following strings:
| "VARCHAR2" |
| "VARCHAR" |
| "CHAR" |
| "NUMBER" |
| "LONG" |
| "LONG RAW" |
| "ROWID" |
| "DATE" |
| "CURSOR" |
When using oci8 as a replacement for the deprecated oracle extension, consider using:
| oci_field_type() |
| oci_field_type_raw() |