Re: AWK script

Hi Atif
from one  non expert to another, does this help:

glenn@baldur:~$ cat x
ORDER BY var[x,y]
ORDER BY var[2,5]
ORDER BY var[Z,Q]
ORDER BY var[ABC,DEF]

glenn@baldur:~$ sed 's/ORDER\ BY\ var\[\(.*\),\(.*\)\]/ORDER\ BY\
SUBSTRING(var\ FROM\ \1\ FOR\ \2\)/' x
ORDER BY SUBSTRING(var FROM x FOR y)
ORDER BY SUBSTRING(var FROM 2 FOR 5)
ORDER BY SUBSTRING(var FROM Z FOR Q)
ORDER BY SUBSTRING(var FROM ABC FOR DEF)

So, tahts with sed, haven't tried awk yet. let you know if I come up
with something.


On Tue, 2010-04-13 at 14:30 +0100, Atif Jung wrote:
> I've been tasked with writing a script which will automatically update
> our exisitng INFORMIX code to include POSTGRES compliant equivalent
> code. My awk skills are pretty basic to say the least, but  I've
> managed to write some of the rules in an awk script, but am having
> difficulty with the following
>
>
> CHANGE INFORMIX CODE
>
> ORDER BY var[x,y];
>
> TO POSTGRES CODE
>
> ORDER BY SUBSTRING(var FROM x FOR y);
>
> my problem is var[x,y] is completely variable. How do I check for that
> in AWK/SED? Is it even possible?
>
> Thanks
>
>
>