Oracle and Sun have been granted an extra week to defend their planned US$7 billion merger in front of European regulators, said the European Commission.
Earlier this month the Commission, Europe's top antitrust regulator, issued formal objections to the deal, arguing that it posed a threat to competition in the market for database software.
The deadline for a final ruling has been put back to 27 January from 19 January, which amounts to six additional working days for Oracle to win over the sceptical regulator.
"Oracle requested the extension in order to have the opportunity to further develop its arguments in response to the Commission's concerns," the Commission said in a routine weekly statement on the status of ongoing merger investigations.
The Commission's concerns centre on Oracle acquiring MySQL, an open source database developed in Europe and bought by Sun a year ago for $1 billion. It argued in its statement of objections that the acquisition of the most significant open source database on the market by Oracle, the proprietary database market leader, could harm competition.
Oracle responded angrily, accusing the Commission of not understanding the database market. It claimed that MySQL was aimed at a totally different type of client from the ones that use Oracle's database products.
However, the Commission, as well as many observers, argue that even if the products don't compete at the moment, Oracle's ownership of MySQL could stifle the software's development. This could have a negative long term effect on the database market, they said.