Postgres Ingestion Fails

[ulixius9]

Describe the bug
While ingesting postgres getting following error in log

Traceback (most recent call last):
  File "/Users/mayursingal/Desktop/ulixius1/OpenMetadata/venv/lib/python3.8/site-packages/metadata/ingestion/source/sql_source.py", line 551, in _get_columns
    col_data_length = self._check_col_length(
  File "/Users/mayursingal/Desktop/ulixius1/OpenMetadata/venv/lib/python3.8/site-packages/metadata/ingestion/source/sql_source.py", line 647, in _check_col_length
    return col_raw_type.length if col_raw_type.length else 1
AttributeError: 'OID' object has no attribute 'length'
ERROR: 'OID' object has no attribute 'length' : {'name': 'oid', 'type': OID(), 'nullable': True, 'default': None, 'autoincrement': False, 'comment': None}
ERROR: Failed to ingest sample data for table __root__='_pg_foreign_servers'
Traceback (most recent call last):
  File "/Users/mayursingal/Desktop/ulixius1/OpenMetadata/venv/lib/python3.8/site-packages/metadata/ingestion/source/sql_source.py", line 551, in _get_columns
    col_data_length = self._check_col_length(
  File "/Users/mayursingal/Desktop/ulixius1/OpenMetadata/venv/lib/python3.8/site-packages/metadata/ingestion/source/sql_source.py", line 647, in _check_col_length
    return col_raw_type.length if col_raw_type.length else 1
AttributeError: 'OID' object has no attribute 'length'
ERROR: 'OID' object has no attribute 'length' : {'name': 'oid', 'type': OID(), 'nullable': True, 'default': None, 'autoincrement': False, 'comment': None}
Traceback (most recent call last):
  File "/Users/mayursingal/Desktop/ulixius1/OpenMetadata/venv/lib/python3.8/site-packages/metadata/ingestion/source/sql_source.py", line 551, in _get_columns
    col_data_length = self._check_col_length(
  File "/Users/mayursingal/Desktop/ulixius1/OpenMetadata/venv/lib/python3.8/site-packages/metadata/ingestion/source/sql_source.py", line 647, in _check_col_length
    return col_raw_type.length if col_raw_type.length else 1
AttributeError: 'OID' object has no attribute 'length'
ERROR: 'OID' object has no attribute 'length' : {'name': 'fdwowner', 'type': OID(), 'nullable': True, 'default': None, 'autoincrement': False, 'comment': None}
ERROR: Failed to ingest sample data for table __root__='_pg_foreign_data_wrappers'
Traceback (most recent call last):
  File "/Users/mayursingal/Desktop/ulixius1/OpenMetadata/venv/lib/python3.8/site-packages/metadata/ingestion/source/sql_source.py", line 551, in _get_columns
    col_data_length = self._check_col_length(
  File "/Users/mayursingal/Desktop/ulixius1/OpenMetadata/venv/lib/python3.8/site-packages/metadata/ingestion/source/sql_source.py", line 647, in _check_col_length
    return col_raw_type.length if col_raw_type.length else 1
AttributeError: 'OID' object has no attribute 'length'
ERROR: 'OID' object has no attribute 'length' : {'name': 'oid', 'type': OID(), 'nullable': True, 'default': None, 'autoincrement': False, 'comment': None}
Traceback (most recent call last):
  File "/Users/mayursingal/Desktop/ulixius1/OpenMetadata/venv/lib/python3.8/site-packages/metadata/ingestion/source/sql_source.py", line 551, in _get_columns
    col_data_length = self._check_col_length(
  File "/Users/mayursingal/Desktop/ulixius1/OpenMetadata/venv/lib/python3.8/site-packages/metadata/ingestion/source/sql_source.py", line 647, in _check_col_length
    return col_raw_type.length if col_raw_type.length else 1
AttributeError: 'OID' object has no attribute 'length'
ERROR: 'OID' object has no attribute 'length' : {'name': 'umuser', 'type': OID(), 'nullable': True, 'default': None, 'autoincrement': False, 'comment': None}
ERROR: Failed to ingest sample data for table __root__='_pg_user_mappings'