Re: relevance

Rajesh Kumar Mallah wrote:
> 
> 
> On Thursday 17 Jul 2003 8:21 am, Terence Kearns wrote:
> 
>>>>select id from tablename where message like '%sql%';
>>>>
>>>>If there any way to determine exactly how many times 'sql' is matched in
>>>>that search in each particular row, and then sort by the most matches,
>>>>or am I going to have to write a script to do the sorting for me?
>>
>>You could probably write a function in postgres (say, "matchcount()")
>>which returns the match count (possibly using perl and a regex).
> 
> 
> 
> Why reinvent the wheel when tsearch already does the job perfectly 
> and is PostgreSQL compaitable.
> 

Tsearch2 looks like it would be very useful but it's a lot of work to 
implement IMHO. At least it will probably (assumption) be a lot more 
efficient for massive amounts of data.

Remember the original question was regarding how to list results in 
order of how many hits were returned for each matched record.


-- 
Terence Kearns ~ ph: +61 2 6201 5516
IT Database/Applications Developer
Enterprise Information Systems
Client Services Division
University of Canberra
www.canberra.edu.au