Hi, I'm komikoni(Keisuke Konishi).

I created the regular expression function (UDF) which does not exist in db2.
The UDF using the SQL/XML(Xquery).
You can easily install.

List of regular expressions provide UDF

1. REG_MATCHES
   provides Coincidence existence ( Scalar )
2. REG_REPLACE
   string substitution ( Scalar )
3. REG_COUNT
   number of matches retrieved ( Scalar )
4. REG_POSITION
   match position acquisition ( Scalar )
5. REG_SUBSTR
   gets a string matching ( Scalar )
6. REG_SUBSTR_TABLE
   list of matching string information ( Table )
7. REG_TOKENIZE_TABLE
   list of mismatched string information (divided by a separator string) ( Table )
8. REG_ALLTOKEN_TABLE
   list of mismatch string and matching string information ( Table )

Scripts can be downloaded from here.
(Sorry in Japanese)

https://www.ibm.com/developerworks/jp/data/library/db2/j_d-regularexpression/
(English : Machine translation Script Download)

I look forward to your feedback and comments.