sqlite3查看select使用什么索引

eg:

CREATE TABLE Person (id integer primary key, name text, age integer default 5);

CREATE INDEX index_age on Person (age);

EXPLAIN QUERY PLAN  select * from Person where age = 9;

selectid    order       from        detail                                           

----------  ----------  ----------  -------------------------------------------------

0           0           0           SEARCH TABLE Person USING INDEX index_age (age=?)