Re: [HACKERS] BLOB HOWTO??

I'm interested by TOAST, and I have asked several questions on the subject...
I haven't tested them yet...

First I thought that the type bytea allows storing of binary data, a BSOB
(Binary Small OBject).
Secondly that by using a binary cursor you have access to the raw data as it
is stored in the database, but not as it is presented in ASCII
Thridly we could use a funtion to retreive parts of columns, something like
mid(column,start,length)
Fourthly we may use the same function for storing data back.

Cheers...
Franck@sopac.org

Jan Wieck wrote:

> Olivier PRENANT wrote:
> > Hi Bruce,
> >
> > Any idea when it's due for??
> > I've been thining about writing a user function; But I'll get stuck with
> > permission as a user function is running under the "postgres" or whatever
> > user instead of the calling user.
> >
> > Also, what kind of binary interface are you thinking of??
>
>     Something similar to the existing lo_...() functions.
>
>     Actually,  someone  should  use the existing large objects to
>     deal with binary content.  What has to be kept in mind is
>
>     1.  You have to cleanup yourself - the existing large objects
>         aren't  removed  automatically  if you delete a table row
>         referencing to the LO or drop the table.
>
>     2.  The existing LOs don't have copy  behaviour.  So  if  you
>         reference  to  a  LO  from one table and do an INSERT ...
>         SELECT, just it's OID is copied,  not  the  data  (as  it
>         should be IMHO).
>
> Jan
>
> --
>
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