Question

I have an implementation of the jaro-winkler algorithm in my database. I did not write this function. The function compares two values and gives the probability of match.

So jaro(string1, string2, matchnoofchars) will return a result.

Instead of comparing two strings, I want to send one string with a matchnoofchars and then get a result set with the probability higher than 95%.

For example the current function is able to return 97.62% for jaro(“Philadelphia”,”Philadelphlaa”,9)

I wish to tweak this function so that I am able to find “Philadelphia” for an input of “Philadelphlaa”. What kind of changes do I need to make for this to happen?

I am using Oracle 9i.

Answer 1

DECLARE
  CURSOR citynames IS
    SELECT city FROM table_loc_master where statecode = 'PQ';
  CURSOR leasecity IS
    SELECT city FROM table_loc where State = 'PQ'
    MINUS
    SELECT to_char(city) city FROM table_loc_master where statecode = 'PQ';
  xProb NUMBER(10,8);
BEGIN
  FOR x_rec IN leasecity
  LOOP
      FOR y_rec IN citynames
      LOOP
            xProb := jwrun(x_rec.city,y_rec.city,length(y_rec.city));
            If xProb > 0.97 Then
               DBMS_OUTPUT.PUT_LINE('Source : ' || x_rec.city || ' Target: ' || y_rec.city );
            End if;
      END LOOP;
  END LOOP;
END;