<Page> Exhibit 10.21 AMENDMENT TO INFORMIX CORPORATION 1997 NON-STATUTORY STOCK OPTION PLAN APPROVED BY THE BOARD OF DIRECTORS JULY 12, 2000 SECTION 3 - STOCK SUBJECT TO THE PLAN. The maximum number of shares of Common Stock available for grant under the 1997 Plan was increased by one million two hundred thousand (1,200,000) shares to one million seven hundred thousand (1,700,000) shares.* * Share numbers do not reflect the one-for-four reverse stock split effected June 17, 2003.