1--source include/have_debug.inc 2--source include/have_rocksdb.inc 3 4CREATE TABLE t1 (a INT, b CHAR(8), KEY ab(a, b)) ENGINE=rocksdb DEFAULT CHARSET utf8mb4 COLLATE utf8mb4_bin; 5INSERT INTO t1 (a,b) VALUES (76,'bar'); 6INSERT INTO t1 (a,b) VALUES (35,'foo'); 7INSERT INTO t1 (a,b) VALUES (77,'baz'); 8 9SET debug_dbug="+d,dbug.rocksdb.HA_EXTRA_KEYREAD"; 10 11SELECT b FROM t1 FORCE INDEX(ab) WHERE a=35; 12 13 14SET debug_dbug="-d,dbug.rocksdb.HA_EXTRA_KEYREAD"; 15DROP TABLE t1; 16