Re: Storing small image files

[Nelson Green <nelsongreen84@xxxxxxxxx>]

On Thu, May 9, 2013 at 10:51 AM, Achilleas Mantzios <achill@xxxxxxxxxxxxxxxxxxxxx> wrote:

Take a look here first :

http://www.postgresql.org/docs/9.2/interactive/datatype-binary.html

 

then here : http://www.dbforums.com/postgresql/1666200-insert-jpeg-files-into-bytea-column.html

 

didnt try it myself tho.

 

Most of the time people manipulate bytea's using a higher level programming lang.

Thanks Achilleas. I usually do the physical design in vi using sql scripts, and I like to include a couple of inserts and selects to make sure everything is going according to plan. It looks like I may just have to work with a front-end developer for this particular instance. Of all the stupid things, in all of my years doing this I've never once had to work with storing binary files, other than years ago when I was studying for some of the MySQL certs.

If I do happen to come up with a solution that works I will be sure to post it here.

 

 

 

On Πεμ 09 Μαΐ 2013 10:34:35 Nelson Green wrote:

On Thu, May 9, 2013 at 10:20 AM, Achilleas Mantzios <achill@xxxxxxxxxxxxxxxxxxxxx> wrote:

why not bytea?

Hi Achilleas,

Actually I was asking if bytea is the correct datatype, and if so, would someone mind providing a simple example of how to insert and retrieve the image through the psql client.

Let's say I have an employee named Paul Kendell, who's employee ID is 880918. Their badge number will be PK00880918, and their badge photo is named /tmp/PK00880918.jpg. What would the INSERT statement look like to put that information into the security_badge table, and what would the SELECT statement look like to retrieve that record?

Thanks for your time.

 

much more control, much more information, IMHO.

In our DB evolving from an initial 7.1 back in 2001, and currently on 9.0,

we have been storing everything binary in bytea's.

 

There are downsides in both solutions, you just have to have good reasons

to not use bytea.

 

On Πεμ 09 Μαΐ 2013 10:04:18 Nelson Green wrote:

Good morning list,

I am designing a system that will have a table for security badges, and we want to store the ID badge photo. These are small files, averaging about 500K in size. We have made the decision to store the image as a BLOB in the table itself for a variety of reasons. However, I am having trouble understanding just how to do that.

The table structures:

CREATE TABLE employee
(
   employee_id                    INTEGER             NOT NULL,
   employee_lastname              VARCHAR(35)         NOT NULL,
   employee_firstname             VARCHAR(35)         NOT NULL,
   employee_mi                    CHAR(1),
   PRIMARY KEY (employee_id)
);

CREATE TABLE security_badge
(
   badge_number                   CHAR(10)            NOT NULL,
   employee_id                    INTEGER             NOT NULL
      REFERENCES employee(employee_id),
   badge_photo                    ????,
   PRIMARY KEY (badge_number)
);

What datatype should I use for the badge_photo (bytea?), and what are the commands to insert the picture accessing the server remotely through psql, and to retrieve the photos as well, please?

Thanks,
Nelson

-

Achilleas Mantzios

IT DEV

IT DEPT

Dynacom Tankers Mgmt

-

Achilleas Mantzios

IT DEV

IT DEPT

Dynacom Tankers Mgmt