Pavel Stehule: diff string for PostgreSQL

Hello,I am working on migration a large dataset from archive to a new format. This work is joined with searching a small differences between original and transformed data. For this work I implemented a small library for PostgreSQL. It contains a two functions: diff_string and lc_substring.These functions should to support multibyte encoding. I hope, so this can be useful for someone.

postgres=# select lc_substring('Hello World','ello');
 lc_substring 
──────────────
 ello
(1 row)

postgres=# select diff_string('Hello World','ello');
         diff_string         
─────────────────────────────
 <del>H</>ello<del> World</>
(1 row)

This library exists on pgFoundry http://pgfoundry.org/frs/?group_id=1000457