Who was Gil's partner on 10–12 july 2009
CREATE TABLE "doubles_17" (
  "edition" text,
  "round" text,
  "date" text,
  "partnering" text,
  "against" text,
  "surface" text,
  "opponents" text,
  "w_l" text,
  "result" text
);
SELECT "partnering" FROM "doubles_17" WHERE "date"='10–12 July 2009';