How to use the ddlparse.ddlparse.DdlParse.DATABASE.oracle function in ddlparse

"datatype_oracle":
    {
        "ddl":
            """
            CREATE TABLE Sample_Table (
              Col_01 date,
              Col_02 number(1),
              Col_03 number(1,2),
              Col_04 number,
              Col_05 varchar2(3 char), -- character semantics
              Col_06 varchar2(4 byte), -- byte semantics
              Col_07 clob,
              Col_08 nclob
            );
            """,
        "database": DdlParse.DATABASE.oracle,
        "table": {"schema": None, "name": "Sample_Table", "temp": False},
        "columns": [
            {"name": "Col_01", "type": "DATE", "length": None, "scale": None, "array_dimensional": 0, "is_unsigned": False, "is_zerofill": False, "not_null": False, "pk": False, "unique": False, "constraint": "", "description": None},
            {"name": "Col_02", "type": "NUMBER", "length": 1, "scale": None, "array_dimensional": 0, "is_unsigned": False, "is_zerofill": False, "not_null": False, "pk": False, "unique": False, "constraint": "", "description": None},
            {"name": "Col_03", "type": "NUMBER", "length": 1, "scale": 2, "array_dimensional": 0, "is_unsigned": False, "is_zerofill": False, "not_null": False, "pk": False, "unique": False, "constraint": "", "description": None},
            {"name": "Col_04", "type": "NUMBER", "length": None, "scale": None, "array_dimensional": 0, "is_unsigned": False, "is_zerofill": False, "not_null": False, "pk": False, "unique": False, "constraint": "", "description": None},
            {"name": "Col_05", "type": "VARCHAR2", "length": 3, "scale": None, "array_dimensional": 0, "is_unsigned": False, "is_zerofill": False, "not_null": False, "pk": False, "unique": False, "constraint": "", "description": None},
            {"name": "Col_06", "type": "VARCHAR2", "length": 4, "scale": None, "array_dimensional": 0, "is_unsigned": False, "is_zerofill": False, "not_null": False, "pk": False, "unique": False, "constraint": "", "description": None},
            {"name": "Col_07", "type": "CLOB", "length": None, "scale": None, "array_dimensional": 0, "is_unsigned": False, "is_zerofill": False, "not_null": False, "pk": False, "unique": False, "constraint": "", "description": None},
            {"name": "Col_08", "type": "NCLOB", "length": None, "scale": None, "array_dimensional": 0, "is_unsigned": False, "is_zerofill": False, "not_null": False, "pk": False, "unique": False, "constraint": "", "description": None},
        ],
        "bq_field": [
            '{"name": "Col_01", "type": "DATETIME", "mode": "NULLABLE"}',
            '{"name": "Col_02", "type": "INTEGER", "mode": "NULLABLE"}',
            '{"name": "Col_03", "type": "FLOAT", "mode": "NULLABLE"}',
            '{"name": "Col_04", "type": "NUMERIC", "mode": "NULLABLE"}',