CREATE TABLE table_46917 ("Year" FLOAT, "Winner" CLOB, "Jockey" CLOB, "Trainer" CLOB, "Owner" CLOB)

Who was the trainer when Mckaymackenna won?
SELECT "Trainer" FROM table_46917 WHERE "Winner" = 'mckaymackenna'
SELECT "Trainer" FROM "table_46917" WHERE "Winner" = 'mckaymackenna'