Re: Resources - Regular Expressions

Not implemented in PostgreSQL RE's AFAIK.
But you can use pl/perl to do it.  Just write a
function that takes a text type parameter (your RE
string) and returns the $1 value.

--- Gurudutt <guru@indvalley.com> wrote:
> Hi!!
> 
> Thanks a lot for all the advices, I knew i could
> always get help from
> the lists. Had festival so couldn't reply earlier
> and we were closed.
> 
> I have parallel question, I read about regular
> expressions being
> faster than the 'like', is it correct and one more
> thing how do u
> extract information fro a given regular expression
> 
> eg: like in perl anything inside the () can be
> extracted into a
> variable
> 
> like...
> 
> # Program Segment Starts here
> 
> $disksize = $1 if (/Storage Swap
> size:\s+([-0-9\.]+)\s+MB/);
> 
> # Program segment ends here
> 
> as u can see the '$1' has the value of the
> expression thats got evaluated.
> 
> Now my question is when i use the same in a SQL
> statement all I can
> get is just a boolean value whether it evaluates to
> true or false ,
> nothing more than that.
> 
> I would like to extract the value from the evaluated
> regular
> expression in a SQL query
> 
> Is that possible?
> 
> Thanks in advance...
> 
> 
> Best regards,
>  Gurudutt                           
> mailto:guru@indvalley.com
> 
> Life is not fair - get used to it.
> Bill Gates
> 
> 
> Saturday, January 12, 2002, 2:43:13 AM, you wrote:
> 
> FB> At 03:42 PM 1/11/02 -0500, Wei Weng wrote:
> 
> 
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