[REBOL] Re: Retrieving mysql columns by name
From: didier:jacquemart:libertysurf at: 8-Apr-2002 23:08
Thank you for answering my question.
Here's another one.
---------------------------------------------
I wrote this program :
;; this is the list of columns in my Mysql request
zlistechamps: copy [ "livnum" "livtit" "livaut" "livcat" "livdif" "autnum"
autabr
"autcom" ]
getcol: func [ prow 'pnom ]
; prow is the row i get from mysql request
; pnom is the name of the field i want to retrieve
[
use [ xind ]
[
xind: index? find zlistechamps pnom
pick prow xind
]
]
I then get my values by :
print getcol row "livnum"
print getcol row "livtit"
print getcol row "autcom"
which is equivalent to
print row/1
print row/2
print row/8
This way seems to me much more easy and self-explaining than using order
numbers. It has the advantage to be request independent.
Last problem to solve : How can i automatically create the list of fields in
zlistechamps; can i retrieve the columns names from mysql, in a manner like
show columns from table
. The difference is that the sql request is not
upon a table but is a join request.
Further, I think the ultimate goal would be object oriented programming,
something that could look like this :
rq: open_request("select .....")
rq/next
x: rq/fields "livnum"
...
It's just an idea from a newbie in Rebol (i don't even know if the syntax is
correct); perhaps does this already exist ?
Thank you.
