Can't open MS ACESS Database with ADOBDAPI

Question

When I try to connect to an MS-Access database with Python ADODBAPI library, I have an error message.

I have tried to use the Microsoft.ACE.OLEDB.12.0 provider but it's the same thing. I can open the database with the Microsoft.Jet.OLEDB.4.0 provider in C# on the same computer.

# -*- coding:Utf-8 -*-

import sys
import adodbapi
import argparse

__version__ = 1.0
debugmode = False

# Constantes de connection sur la base de donnees.

MDB = 'D:\lp_2012_3.mdb'
DRV = 'Microsoft.Jet.OLEDB.4.0'
PWD = ''
conn_string = r'Provider=%s; Data Source=%s' % (DRV,MDB)

def main():

    #Connection a la base de donnees.
    print('%s'%conn_string)
    conn = adodbapi.connect(conn_string)
    conn.autocommit = False
    cur = conn.cursor()

    #Definition de la requete
    SQLselect = 'SELECT TOP 10 * FROM PERSONNE;'
    # Lancement de la requete 
    record = cur.execute(SQLselect).fetchall()
    #print('%s'%(type(cur.description)))
    #Get columns name
    entete = []
    for fld in cur.columns('PERSONNE'):
        entete.append(fld.column_name)
        #print(fld.table_name, fld.column_name)
    #print('%s'%(entete))

    cur.close()
    conn.close()

if (__name__ == '__main__'):
    #Recupere les arguments transmis
    parser = argparse.ArgumentParser()
    parser.add_argument('-v', '--verbose', action = 'store_true', help = 'augmente la verbosité')
    parser.add_argument('-l', '--log', action = 'store_true', help = 'active le mode log')
    parser.add_argument('-d', '--debug', action='store_true', help='debug mode')
    args = parser.parse_args()
    #applique la configuration
    if args.debug:
        debugmode = True
    sys.exit(main())

I have the following error code :

adodbapi.apibase.OperationalError: (InterfaceError("Windows COM Error: >Dispatch('ADODB.Connection') failed."), 'Error opening connection to >"Provider=Microsoft.Jet.OLEDB.4.0; Data Source=D:\lp_2012_3.mdb"')

Thanks for your help.

PS : Some people are still using MS-ACCESS.

Answer 1

If it is possible to use a different module...

I found the pyodbc module much less problematic compared to the adodbapi module after using both for a recent project. pyodbc is currently still being maintained (unlike adodbapi, I have been told) and there is much better documentation for it.

If you need to do parameterized queries make sure to use version 4.0.27 or later, as discussed here https://github.com/mkleehammer/pyodbc/issues/509.

I have been successful connecting to MS Access 2016 with the 64 bit ACE driver (once properly installed) as follows:

connectionString = (
    f'Driver={{Microsoft Access Driver (*.mdb, *.accdb)}};DBQ={database_path};'
)
connection = odbc.connect(connectionString, autocommit = True)

The double brackets are to escape the needed brackets around the driver name.