Unable to Insert Dataframe into Database Table

Question

I am trying to insert my dataframe into a newly created table in Teradata. My connection and creating the table using SQLAchmey works, but I am unable to insert the data. I keep getting the same error that the schemy columns do not exist.

Here is my code:

username = '..'
password= '..'
server ='...'
database ='..'
driver = 'Aster ODBC Driver'
engine_stmt = ("mssql+pyodbc://%s:%s@%s/%s?driver=%s" % (username, password, server, database, driver ))
engine = sqlalchemy.create_engine(engine_stmt)
conn = engine.raw_connection()

#create tble function
def create_sql_tbl_schema(conn):
    #tbl_cols_sql = gen_tbl_cols_sql(df)
    sql = "CREATE TABLE so_sandbox.mn_testCreation3  (A INTEGER NULL,B  INTEGER NULL,C INTEGER NULL,D  INTEGER NULL) DISTRIBUTE BY HASH (A) STORAGE ROW COMPRESS LOW;"
    cur = conn2.cursor()
    cur.execute('rollback')
    cur.execute(sql)
    cur.close()
    conn.commit()

create_mysql_tbl_schema(conn) #this works and the table is created
df = pd.DataFrame(np.random.randint(0,100,size=(100, 4)), columns=list('abcd'))
df.to_sql('mn_testCreation3', con=engine,
              schema='so_sandbox', index=False, if_exists='append') #this is giving me problems

Error message returned is:

sqlalchemy.exc.ProgrammingError: (pyodbc.ProgrammingError) ('42000', '[42000] [AsterData][nCluster] (34) ERROR: relation "INFORMATION_SCHEMA"."COLUMNS" does not exist.  (34) (SQLPrepare)') [SQL: 'SELECT [INFORMATION_SCHEMA].[COLUMNS].[TABLE_SCHEMA], [INFORMATION_SCHEMA].[COLUMNS].[TABLE_NAME], [INFORMATION_SCHEMA].[COLUMNS].[COLUMN_NAME], [INFORMATION_SCHEMA].[COLUMNS].[IS_NULLABLE], [INFORMATION_SCHEMA].[COLUMNS].[DATA_TYPE], [INFORMATION_SCHEMA].[COLUMNS].[ORDINAL_POSITION], [INFORMATION_SCHEMA].[COLUMNS].[CHARACTER_MAXIMUM_LENGTH], [INFORMATION_SCHEMA].[COLUMNS].[NUMERIC_PRECISION], [INFORMATION_SCHEMA].[COLUMNS].[NUMERIC_SCALE], [INFORMATION_SCHEMA].[COLUMNS].[COLUMN_DEFAULT], [INFORMATION_SCHEMA].[COLUMNS].[COLLATION_NAME] \nFROM [INFORMATION_SCHEMA].[COLUMNS] \nWHERE [INFORMATION_SCHEMA].[COLUMNS].[TABLE_NAME] = ? AND [INFORMATION_SCHEMA].[COLUMNS].[TABLE_SCHEMA] = ?'] [parameters: ('mn_testCreation3', 'so_sandbox')] (Background on this error at: http://sqlalche.me/e/f405)