Rename field in Access DB

[Iain King]

I'm manipulating an MS Access db via ADODB with win32com.client. I
want to rename a field within a table, but I don't know how to. I
assume there is a line of SQL which will do it, but nothing I've tried
(from searching) has worked.
Basic code:

import win32com.client
connection = win32com.client.Dispatch(r'ADODB.Connection')
DSN = 'PROVIDER=Microsoft.Jet.OLEDB.4.0;DATA SOURCE=dbfile.mdb;'
connection.Open(DSN)
connection.Execute("ALTER TABLE tablename CHANGE from to") #this sql
doesn't work
connection.Close()

Anyone know how to get this to work?

Iain

 

[Diez B. Roggisch]

I'm manipulating an MS Access db via ADODB with win32com.client. I
want to rename a field within a table, but I don't know how to. I
assume there is a line of SQL which will do it, but nothing I've tried
(from searching) has worked.
Basic code:

import win32com.client
connection = win32com.client.Dispatch(r'ADODB.Connection')
DSN = 'PROVIDER=Microsoft.Jet.OLEDB.4.0;DATA SOURCE=dbfile.mdb;'
connection.Open(DSN)
connection.Execute("ALTER TABLE tablename CHANGE from to") #this sql
doesn't work
connection.Close()

Anyone know how to get this to work?

I don't think Access supports SQL on the DDL-side. Try looking into the
Access COM-Api, maybe you can get a reference to the table and modify it.

Diez

 

[Tim Golden]

I'm manipulating an MS Access db via ADODB with win32com.client. I
want to rename a field within a table, but I don't know how to. I
assume there is a line of SQL which will do it, but nothing I've tried
(from searching) has worked.
Basic code:

import win32com.client
connection = win32com.client.Dispatch(r'ADODB.Connection')
DSN = 'PROVIDER=Microsoft.Jet.OLEDB.4.0;DATA SOURCE=dbfile.mdb;'
connection.Open(DSN)
connection.Execute("ALTER TABLE tablename CHANGE from to") #this sql
doesn't work
connection.Close()

<code>
import os, sys
from win32com.client.gencache import EnsureDispatch as Dispatch

DATABASE_FILEPATH = r"c:\temp\test.mdb"
CONNECTION_STRING = "Provider=Microsoft.Jet.OLEDB.4.0; data Source=%s" % \
DATABASE_FILEPATH

if os.path.exists (DATABASE_FILEPATH):
os.remove (DATABASE_FILEPATH)

adox = Dispatch ("ADOX.Catalog")
adox.Create (CONNECTION_STRING)
adox = None

db = Dispatch ('ADODB.Connection')
db.Open (CONNECTION_STRING)
try:
db.Execute ('CREATE TABLE dtest (id INT, data INT)')
db.Execute ('INSERT INTO dtest (id, data) VALUES (1, 2)')

try:
db.Execute ('SELECT id, newdata FROM dtest')
except:
print "FAILED as expected"
else:
print "SUCCEEDED unexpectedly"

try:
db.Execute ('SELECT id, data FROM dtest')
except:
print "FAILED unexpectedly"
else:
print "SUCCEEDED as expected"

adox = Dispatch ("ADOX.Catalog")
adox.ActiveConnection = db
adox.Tables ("dtest").Columns ("data").Name = "newdata"
adox.Tables.Refresh ()
finally:
db.Close ()

db = Dispatch ('ADODB.Connection')
db.Open (CONNECTION_STRING)
try:

try:
db.Execute ('SELECT id, data FROM dtest')
except:
print "FAILED as expected"
else:
print "SUCCEEDED unexpectedly"

try:
db.Execute ('SELECT id, newdata FROM dtest')
except:
print "FAILED unexpectedly"
else:
print "SUCCEEDED as expected"

finally:
db.Close ()

</code>

TJG

 

[Iain King]

<code>
import os, sys
from win32com.client.gencache import EnsureDispatch as Dispatch

DATABASE_FILEPATH = r"c:\temp\test.mdb"
CONNECTION_STRING = "Provider=Microsoft.Jet.OLEDB.4.0; data Source=%s" % \
DATABASE_FILEPATH

if os.path.exists (DATABASE_FILEPATH):
os.remove (DATABASE_FILEPATH)

adox = Dispatch ("ADOX.Catalog")
adox.Create (CONNECTION_STRING)
adox = None

db = Dispatch ('ADODB.Connection')
db.Open (CONNECTION_STRING)
try:
db.Execute ('CREATE TABLE dtest (id INT, data INT)')
db.Execute ('INSERT INTO dtest (id, data) VALUES (1, 2)')

try:
db.Execute ('SELECT id, newdata FROM dtest')
except:
print "FAILED as expected"
else:
print "SUCCEEDED unexpectedly"

try:
db.Execute ('SELECT id, data FROM dtest')
except:
print "FAILED unexpectedly"
else:
print "SUCCEEDED as expected"

adox = Dispatch ("ADOX.Catalog")
adox.ActiveConnection = db
adox.Tables ("dtest").Columns ("data").Name = "newdata"
adox.Tables.Refresh ()
finally:
db.Close ()

db = Dispatch ('ADODB.Connection')
db.Open (CONNECTION_STRING)
try:

try:
db.Execute ('SELECT id, data FROM dtest')
except:
print "FAILED as expected"
else:
print "SUCCEEDED unexpectedly"

try:
db.Execute ('SELECT id, newdata FROM dtest')
except:
print "FAILED unexpectedly"
else:
print "SUCCEEDED as expected"

finally:
db.Close ()

</code>

TJG

Excellent, many thanks.

Iain