zhaoxin wrote:
> Hi.
> I have some questions with psqlodbc 08.02.0002 .
> 1> Is there only one driver installed by 08.02.0002 ? why?
> is it Unicode or ANSI ?
Both. In terms of ODBC there is no difference, the earlier split into
two versions was for other reasons.
> 2> Is this driver thread safe ?
> 3> When I test the driver for ODBC Data Type by SQLColumns
> function , I found it return different value from 08.01.0200 .
> example:
> psqlodbc(08.02.0002) psqlodbc(08.01.0200)
> char -8 1
SQL_WCHAR = -8
SQL_CHAR = 1
> char(1000) -10 -1
SQL_WLONGVARCHAR = -10
SQL_LONGVARCHAR = -1
> varchar -9 12
SQL_WVARCHAR = -9
SQL_VARCHAR = 12
> varchar(1000) -10 -1
> text -10 -10
> bytea -3 -3
SQL_VARBINARY = -3
> why the return value changed ? where can I get the detailed change ?
As you can see, it's Unicode versus ANSI. You obviously used the ANSI
driver in the 8.01 series. It's correct, really -- the driver merely
specifies that the data that it has is Unicode data. If you want to
retrieve it using ANSI encoding, that's no problem, just request the
columns using the SQL_C_CHAR type to indicate that you want to get your
data back in a single-byte ANSI encoding.
Cheers,
Bart