UPDATE "t" SET "a" = 1
UPDATE "t" SET "a" = 3, "b" = 'a', "c" = NULL, "d" = DEFAULT
UPDATE "t" SET "a" = 1 FROM "x"
UPDATE "t" SET "a" = 1 FROM "x","y","z"
UPDATE "t" SET "a" = 1 FROM "x" WHERE  ( ("x"<100 ) AND  ("y">200 ))
UPDATE "t" SET "a" = 1
UPDATE "foo" SET "a" = 1 RETURNING "*"
UPDATE "foo" SET "a" = 1 RETURNING "a"
UPDATE "foo" SET "a" = 1 RETURNING "a","b"
UPDATE "foo" SET "a" = 1 WHERE CURRENT OF $1
UPDATE "foo" SET "a" = 1 WHERE CURRENT OF cur