Originally the EU had planned to conclude its investigations into the merger on 19 January 2010, but it has changed the date to 27 January to give Oracle the time it needs to develop a response.
The investigation began in September after the European Commission raised concerns that Oracle would gain complete dominance in the database market. A war of words has since ensued, with the EU competition commissioner Neelie Kroes putting pressure on the US supplier.
Last month, a spokesman claimed on her behalf that not enough had been done to quash the competition concerns.
Oracle announced in April 2009 that it was to buy Sun for $7.4bn, but the merger has been held up by the EU despite getting clearance from the US authorities. Sun has since blamed the delays for directly contributing to it making thousands of job cuts.
A version of this story originally appeared on MicroScope >>