Developed a multi-functional XML database environment using PostgreSQL as a graduate student project. Extended PostgreSQL functionality using [Server Programming Interface](https://www.postgresql.org/docs/current/spi.html). Awarded [super creater award at IPA mitoh youth](https://www.ipa.go.jp/jinzai/esp/mitoipedia/spc/year/2002ysc.html), a goverment program to educate young engineers.