Item_equal still exists at JOIN::make_aggr_tables_info()

CREATE TABLE `t1` (`c` INT(10) UNSIGNED NOT NULL, `b` VARCHAR(255) NOT NULL , PRIMARY KEY (`c`) USING BTREE ) ENGINE=MYISAM;

CREATE TABLE `t2` (`a` INT(10) UNSIGNED NOT NULL, `c` INT(10) UNSIGNED NOT NULL ) ENGINE=MYISAM;

INSERT INTO t1 VALUES(1,'oooo');

INSERT INTO t2 VALUES(1,1);

SELECT t2.a,t1.c FRoM t2 LEFT join t1 ON (t2.c = t1.c) WHERE t2.a = 1;

drop table t1, t2;

(rr) p join_list->elem(0)->on_expr

$4 = (Item_equal *) 0x52b000065fd8