Re: reg:lo_write

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От sandhya
Тема Re: reg:lo_write
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Msg-id 014c01c695e2$62c0d530$cd00000a@sandhyar
обсуждение исходный текст
Ответ на reg:lo_write  ("sandhya" <sandhyar@amiindia.co.in>)
Ответы Re: reg:lo_write  ("Marco Bizzarri" <marco.bizzarri@gmail.com>)
Список pgsql-admin
Hi Macro..
 If i assign my lobj_fd(say LO file descriptor) to one Global int.
 But will my lo_write work if i pass that global int inplace of lobjfd....
One more thing...It should be in "begin" and "end" sessions right!

How can i open a LO in many places and write the content into it.....Will it
get appended to the previous content?
You said two different file descriptors i will be having?How to overcome
it?Any suggestion pls

Anybody please give me suggestion how can i over come this problem?So that i
can proceed further




----- Original Message -----
From: "Marco Bizzarri" <marco.bizzarri@gmail.com>
To: "sandhya" <sandhyar@amiindia.co.in>
Cc: "Postgres" <pgsql-admin@postgresql.org>
Sent: Thursday, June 22, 2006 1:43 PM
Subject: Re: [ADMIN] reg:lo_write


> I'm not sure, but I think you will have problems. As far as I can
> understand, largeobject semantics is similar to files. Therefore, you
> open an existing LO, and you obtain a file descriptor, which will
> point (I think) at the start of the LO. If you write something, the
> file descriptor will be moved accordingly. If you open again (i.e. you
> issue another lo_open), you will have another file descriptor for the
> same LO, which will be at the start of the LO, and you will overwrite
> your previous LO.
>
> Please take care with these advices as I'm not a PostgreSQL expert,
> just reporting some experience.
>
> Regards
> Marco
>
> On 6/22/06, sandhya <sandhyar@amiindia.co.in> wrote:
> >
> >
> > Hi,
> >
> >   If i use lo_write in different function to write data into an
object,Will
> > there be any problem?
> > like,
> > I open my object and add data into it and in another function if i again
> > open the same object and add data....It will append to the previous
content
> > right!Am i wrong?
> >
> > If i wants to append the content to the present object is there anything
i
> > need to do?
> > Please help me in doing  this................
> > I am unable to see the image which i am exporting...
> > Thank you,
> > Sandhya
> >
>
>
> --
> Marco Bizzarri
> http://notenotturne.blogspot.com/
>
> ---------------------------(end of broadcast)---------------------------
> TIP 9: In versions below 8.0, the planner will ignore your desire to
>        choose an index scan if your joining column's datatypes do not
>        match
>



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