[GRASS-user] help with v.db.update

[Sharon M]

Richard - are you working in a win XP environment? If so which vers of WinGrass?

Thanks,

Sharon

On Wed, Apr 6, 2011 at 4:48 PM, Richard Chirgwin
<rchirgwin at ozemail.com.au> wrote:
> "I don't know" is the short answer. Hamish's suggested worked here for
> v.db.update, but when I used "like" in v.db.update, it failed with the same
> error as you saw.
>
> Perhaps a bug in the driver?
>
> Richard
>
> On 6/04/11 5:12 PM, Sharon M wrote:
>>
>> Why does the DBF driver handle like when using v.db.select?
>>
>> On Wed, Apr 6, 2011 at 4:29 PM, Richard Chirgwin
>> <rchirgwin at ozemail.com.au>  wrote:
>>>
>>> On 6/04/11 4:36 PM, grass-user-request at lists.osgeo.org wrote:
>>>>
>>>> Message: 9
>>>> Date: Wed, 6 Apr 2011 16:06:13 +0930
>>>> From: Sharon M<morrisxs09 at gmail.com>
>>>> Subject: [GRASS-user] help with v.db.update
>>>> To:grass-user at lists.osgeo.org
>>>> Message-ID:<BANLkTi=oHUEGstNAuinLiYAMfo5-P3RBFA at mail.gmail.com>
>>>> Content-Type: text/plain; charset=ISO-8859-1
>>>>
>>>> I'm trying to update an attribute table column using v.db.update with
>>>> the DBF driver and keep getting a dbmi: Protocol error message.
>>>>
>>>> Example using Spearfish
>>>>
>>>> g.copy vect=fields,myfields
>>>>
>>>> v.db.addcol myfields col="polynum integer"
>>>>
>>>> v.db.select myfields where="label like 'V%'"
>>>> cat|label|polynum
>>>> 59|V. White#1|
>>>>
>>>> v.db.update myfields col=polynum val=42 where="label like 'V%'"
>>>> dbmi: Protocol error
>>>> ERROR: Error while executing: 'UPDATE myfields SET polynum=42 WHERE
>>>> label like V%
>>>> '
>>>>
>>>> I've tried this on both winGrass 6.4 rc2 or winGrass 6.5 r45847 on
>>>> winXP using the wxGUI via both the v.db.update module and the wxgui
>>>> command line and get the same error issue.
>>>>
>>>> What am I doing wrong? Can anyone help please?
>>>>
>>>> Thanks in advance!
>>>
>>> The dbf driver doesn't handle "like". Try:
>>>
>>> v.db.update myfields column=polynum val=42 where='cat=59'
>>>
>>> and see what happens ...
>>>
>>> If you need more advanced query parameters such as "like", use a
>>> different
>>> database driver - pg or mysql.
>>>
>>> Richard
>>> If
>>>
>>>
>
>
>