Re: Windows, ODBC drivers and strange points ...

Here a partial answer. The reason was the special
ODBC driver libpq I used.

I installed the 08.01.0101 driver and now the base
routines work again.

Strange, that I get a difference ration of 3:1 between
columnLength and columnPresicion with string based
columns.

a char(1) returns the columnPrecision of 1, but a column
length of 3 which I do not understand.


Marten



Marten Feldtmann schrieb:

> Perhaps you might remember my tests with
> PostgreSQL and IBm VisualAge Smalltalk.
>
> I mentioned my problems with column lengths
> and stuff like this.
>
> I still testing (from time to time) with
> the 8.0.3 database and use the newest
> 8.01.00.03 libpq ODBC drivers and now
> the situation is getting worse :-((((
>
> IBM Smalltalk is now not able to get the
> correct column size for strings any more.
>
> I always get either 254 bytes or 508 bytes
> as column size.
>
> We have a table like:
>
> create table "TPERSON" ("ALLCSTVIEW" CHAR(1)
> ....
>
> Now IBM Smalltalk calls OdbcSQLDescribeCol
> and gets 254 for this column as size in the
> return parameter cbPrecision.
>
> And the alternate call via OdbcSQLColAttribute
> with parameter Sql_Column_Lengthreturns  508.
>
> Actually this is true for ALL string columns
>
> The PostgreSQL drivers seem strange for me ...
> I've done work with other database systems
> via this ODBC library, but PostgreSQL does
> not give me any real success ....
>
> If anyone has any help ....
>
> Marten
>
>
>


--
Marten Feldtmann - Germany - Software Development
Information regarding VA Smalltalk and DMS-system
"MSK - Mien Schrievkrom" at: www.schrievkrom.de