fix sequence nextval in default column

[dmaresma]

Hi, I found a defect for a specific column default value when using a sequence

here the test
def test_table_with_sequence():
# test for
ddl = """CREATE TABLE table (
surrogatekey_SK NUMBER(38,0) NOT NULL DEFAULT DBTEST.SCTEST.SQTEST.NEXTVAL COMMENT 'Record Identification Number',
myColumnComment VARCHAR(255) COMMENT 'Record Identification Number from Sequence')"""
result = DDLParser(ddl).run(group_by_type=True)
expected = {
"ddl_properties": [],
"domains": [],
"schemas": [],
"sequences": [],
"tables": [
{
"alter": {},
"checks": [],
"columns": [
{
"check": None,
"comment": "'Record Identification Number'",
"default": "DBTEST.SCTEST.SQTEST.NEXTVAL",
"name": "surrogatekey_SK",
"nullable": False,
"references": None,
"size": (38, 0),
"type": "NUMBER",
"unique": False,
},
{
"check": None,
"comment": "'Record Identification Number from Sequence'",
"default": None,
"name": "myColumnComment",
"nullable": True,
"references": None,
"size": 255,
"type": "VARCHAR",
"unique": False,
},
],
"index": [],
"partitioned_by": [],
"primary_key": [],
"schema": None,
"table_name": "table",
"tablespace": None,
}
],
"types": [],
}
assert result == expected