We rely on handler_stats pointing to a valid active_handler_stats

instance, for ICP accounting, which is created
during ha_handler_stats_reset().  Always invoke that method
during table init to ensure that the handler, regardless of
implementation, has the pointer set correctly

mysql-test/main/rowid_filter_myisam.result

@@ -688,7 +688,7 @@ ANALYZE
  "filtered": 8.529999733,
  "r_total_filtered": 100,
  "index_condition": "t1.nm like '3400%' or t1.nm like '3402%' or t1.nm like '3403%' or t1.nm like '3404%' or t1.nm like '3405%' or t1.nm like '3406%' or t1.nm like '3407%' or t1.nm like '3409%' or t1.nm like '3411%' or t1.nm like '3412%' or t1.nm like '3413%' or t1.nm like '3414%' or t1.nm like '3415%' or t1.nm like '3416%' or t1.nm like '3417%' or t1.nm like '3418%' or t1.nm like '3419%' or t1.nm like '3421%' or t1.nm like '3422%' or t1.nm like '3423%' or t1.nm like '3424%' or t1.nm like '3425%' or t1.nm like '3426%' or t1.nm like '3427%' or t1.nm like '3428%' or t1.nm like '3429%' or t1.nm like '3430%' or t1.nm like '3431%' or t1.nm like '3432%' or t1.nm like '3433%' or t1.nm like '3434%' or t1.nm like '3435%' or t1.nm like '3436%' or t1.nm like '3437%' or t1.nm like '3439%' or t1.nm like '3440%' or t1.nm like '3441%' or t1.nm like '3442%' or t1.nm like '3443%' or t1.nm like '3444%' or t1.nm like '3445%' or t1.nm like '3446%' or t1.nm like '3447%' or t1.nm like '3448%'",
- "r_icp_filtered": 100,
+ "r_icp_filtered": 0,
  "attached_condition": "t1.fl2 = 0",
  "r_filtered": 100
  }

sql/table.cc

@@ -5871,11 +5871,7 @@ void TABLE::init(THD *thd, TABLE_LIST *tl)
  (*f_ptr)->cond_selectivity= 1.0;
  }
 
- /* enable and clear or disable engine query statistics */
- if (thd->should_collect_handler_stats())
- file->ha_handler_stats_reset();
- else
- file->ha_handler_stats_disable();
+ file->ha_handler_stats_reset();
 
  notnull_cond= 0;
  DBUG_ASSERT(!file->keyread_enabled());