Обсуждение: Large Objects and Bytea

Hi, Friends !

On Thursday 25 September 2003 08:11, you wrote:

> I am migrating MS SQL DB to Postgres DB. I have tables with columns of data
> type 'Image' in the MS SQL database. IF I choose 'bytea' datatype, I am
> afraid it may lead to poor performance of the database (which I read from
> the manual). In this case what is the best data type to use.

I am using TEXT fields to store images and pdfs.
There is one "feature": ZERO bytes causes interruption of input and output.
so I am translating Zeroes to '#0' and '#' to '#1' (it is similar to work with
bytea)
I am really not sure that's the best, but usefull.

BTW, i ask Developers: can you remove this "feature" of ZEROES in a TEXT ?
AFAIK the TEXT-type itself allows ANY bytes to store !
(its length representet explisitly in 4 bytes)
The "feature" obviosly grown from C strings......

In this week's General Bits, we talk about using
large objects.  Perhaps this might help you understand
what is involved with using them.

http://www.varlena.com/GeneralBits/

cheers,

elein@varlena.com

On Thu, Sep 25, 2003 at 09:41:28AM +0530, Kumar wrote:
> Hi Friends,
>  
> I am running Postgres 7.3.4 on RH Linux 7.2.
>  
> I am migrating MS SQL DB to Postgres DB. I have tables with columns of data
> type 'Image' in the MS SQL database.
> IF I choose 'bytea' datatype, I am afraid it may lead to poor performance of
> the database (which I read from the manual). In this case what is the best data
> type to use.
>  
> Please suggest me. The explanation of using LOB objects in a table and to write
> them with image is not very clear in the documentation. Can any one send me any
> link or white paper or examples about it.
>  
> Thanks in advance.
>  
> Kumar
>