Psycopg2 date problems: "Can't adapt"

[Steve Holden]

I'm trying to copy data from an Access database to PostgreSQL, as the 
latter now appears to work well in the Windows environment. However I'm 
having trouble with date columns.

The PostgreSQL table receiving the data has the following definition:

CREATE TABLE Lines (
   LinID SERIAL PRIMARY KEY,
   LinDate   TIMESTAMP(0),
   LinQty    INTEGER,
   LinPrdID  INTEGER ,
   LinPrice  NUMERIC(8,2),
   LinInvoice INTEGER)

Here's the problem in a nutshell:

 >>> d
<DateTime object for '2003-10-02 00:00:00.00' at af9be0>
 >>> ocurs.execute("DELETE FROM Lines")
 >>> osql
'INSERT INTO Lines(LinID, LinDate, LinQty, LinPrdID, LinPrice, 
LinInvoice) VALUES(%s, %s, %s, %s, %s, %s)'
 >>> ocurs.execute(osql, (1, d, 1, 1, 12500.0, 88))
Traceback (most recent call last):
   File "<string>", line 1, in <string>
psycopg.ProgrammingError: can't adapt
 >>> ocurs.execute(osql, (1, None, 1, 1, 12500.0, 88))
 >>>

Since the date value's the only difference between the two, I deduce 
it's causing the problem.

I'd rather not have to manipulate the data (in other words, I'd rather 
just change the definition of the receiving table to avoid the error if 
possible), as the copying operation attempts to be table-independent. It 
currently reads:

for tbl, cols in d.items():
     print "Copying", tbl
     dsql = "DELETE FROM %s" % tbl
     ocurs.execute(dsql)
     isql = "SELECT %s FROM %s" % (", ".join(cols), tbl)
     osql = "INSERT INTO %s(%s) VALUES(%s)" % (
         tbl, ", ".join(cols), ", ".join("%s" for c in cols))
     print isql, '\n', osql
     icurs.execute(isql)
     for row in icurs.fetchall():
         ocurs.execute(osql, row)

Though until I started stepping through the data row by row the last two 
lines were replaced by

     ocurs.executemany(osql, icurs.fetchall())

Who can help me past this little sticking point?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
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