CREATE TABLE table_31785 ("Year" TEXT, "Men's Singles" TEXT, "Women's Singles" TEXT, "Men's Doubles" TEXT, "Women's Doubles" TEXT, "Mixed Doubles" TEXT)

Who played men's doubles in 2012?
SELECT "Men's Doubles" FROM table_31785 WHERE "Year" = '2012'
SELECT "Men's Doubles" FROM "table_31785" WHERE "Year" = '2012'