FreeTDS Development Group

[Frediano Ziglio <freddy77 AT gmail.com>]

2012/9/30 Michael Kleehammer <michael AT kleehammer.com>:
> Either there are two problems with selecting XML, or I am seriously
> misunderstanding something.
>
> I am using protocol version 7.2
>
> First, when I select from an xml column, SQLDescribeCol reports the sqltype
> as SQL_CHAR instead of the expected SQL_SS_XML.
>

FreeTDS support XML requesting char data, not in binary format, so the
result is SQL_CHAR (well, perhaps should be SQL_LONGVARCHAR).

> python          7FFF79F56180 EXIT  SQLDescribeCol with return code 0
> (SQL_SUCCESS)
> SQLHSTMT          0x7fc35a616080
>  SQLUSMALLINT      1
> SQLCHAR         * 0x7fff59073a30
>   | s                                        |
>  SQLSMALLINT       300
> SQLSMALLINT     * 0x0
> SQLSMALLINT     * 0x7fff59073a2e (SQL_CHAR)
>  SQLULEN         * 0x7fff59073a20 (2147483647)
> SQLSMALLINT     * 0x7fff59073a1e (0)
>  SQLSMALLINT     * 0x7fff59073a1c (SQL_NULLABLE)
>
> Second, SQLGetData always returns SQL_SUCCESS, even when the buffer is too
> small. It NULL terminates at the given buffer length but gives no
> indication more should be read.
>
> Am I missing something?
>

This seems a bug! Which version are you using? Did you check textsize setting?

> Thanks,
> Michael Kleehammer

Regards,
  Frediano