How do I use a Levenshtein distance function in a

问题:

I'm trying to implement a "Did you mean?" sort of function for a search.

I'm trying to do a query that uses the levenshtein function, which was written in ruby. I was wondering how I could use this function in a sqlite3 query. I was thinking it might be something like this:

@results = the_db.where('levenshtein(name, ?) <= 3', searchphrase)

But i'm not sure how to get it to work. Could someone help me out?

回答1:

Try the editdist3 function:

The editdist3 algorithm is a function that computes the minimum edit distance (a.k.a. the Levenshtein distance) between two input strings.

• http://www.sqlite.org/spellfix1.html