Sorry Glenn, I should have made it clear, when I said 'var[x,y]' is completely variable I meant the whole string, so it could look like:
var[x,y]
:h_def[x,y]
hello[x,y]
and so on ....
I've managed to do the match ok using
/ORDER BY [A-za-z0-9_:]*\[[0-9]*,[0-9]*\]/
this seems to work, but I'm still working on what I would write for the second parameter for the gsub function.
Thanks
Atif
On 13 April 2010 15:02, glenn
<glenn@davy.net.au> wrote:
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
>
>
>
