remove GET_ADJUST_VALUE

avoid contaminating my_getopt with sysvar implementation details.
adjust variable values after my_getopt, like it's done for others.
this fixes --help to show correct values.

include/my_getopt.h

@@ -40,7 +40,6 @@ C_MODE_START
 #define GET_FLAGSET   15
 #define GET_BIT       16
 
-#define GET_ADJUST_VALUE 256
 #define GET_ASK_ADDR     128
 #define GET_AUTO          64
 #define GET_TYPE_MASK     63
@@ -101,8 +100,6 @@ typedef my_bool (*my_get_one_option)(const struct my_option *, const char *, con
 typedef void *(*my_getopt_value)(const char *, uint, const struct my_option *,
                                  int *);
 
-typedef void (*my_getopt_adjust)(const struct my_option *, void *);
-
 extern char *disabled_my_option;
 extern char *autoset_my_option;
 extern my_bool my_getopt_print_errors;
@@ -111,7 +108,6 @@ extern my_bool my_getopt_prefix_matching;
 extern my_bool my_handle_options_init_variables;
 extern my_error_reporter my_getopt_error_reporter;
 extern my_getopt_value my_getopt_get_addr;
-extern my_getopt_adjust my_getopt_adjust_value;
 
 extern int handle_options (int *argc, char ***argv, 
 			   const struct my_option *longopts, my_get_one_option)

mysql-test/main/mysqld--help.result

@@ -1739,29 +1739,29 @@ old-alter-table DEFAULT
 old-mode UTF8_IS_UTF8MB3
 old-passwords FALSE
 old-style-user-limits FALSE
-optimizer-disk-read-cost 0.01024
+optimizer-disk-read-cost 10.24
 optimizer-disk-read-ratio 0.02
 optimizer-extra-pruning-depth 8
-optimizer-index-block-copy-cost 3.56e-05
-optimizer-key-compare-cost 1.1361e-05
-optimizer-key-copy-cost 1.5685e-05
-optimizer-key-lookup-cost 0.000435777
-optimizer-key-next-find-cost 8.2347e-05
+optimizer-index-block-copy-cost 0.0356
+optimizer-key-compare-cost 0.011361
+optimizer-key-copy-cost 0.015685
+optimizer-key-lookup-cost 0.435777
+optimizer-key-next-find-cost 0.082347
 optimizer-max-sel-arg-weight 32000
 optimizer-prune-level 2
-optimizer-row-copy-cost 6.0866e-05
-optimizer-row-lookup-cost 0.000130839
-optimizer-row-next-find-cost 4.5916e-05
-optimizer-rowid-compare-cost 2.653e-06
-optimizer-rowid-copy-cost 2.653e-06
-optimizer-scan-setup-cost 0.01
+optimizer-row-copy-cost 0.060866
+optimizer-row-lookup-cost 0.130839
+optimizer-row-next-find-cost 0.045916
+optimizer-rowid-compare-cost 0.002653
+optimizer-rowid-copy-cost 0.002653
+optimizer-scan-setup-cost 10
 optimizer-search-depth 62
 optimizer-selectivity-sampling-limit 100
 optimizer-switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on,condition_pushdown_for_subquery=on,rowid_filter=on,condition_pushdown_from_having=on
 optimizer-trace 
 optimizer-trace-max-mem-size 1048576
 optimizer-use-condition-selectivity 4
-optimizer-where-cost 3.2e-05
+optimizer-where-cost 0.032
 performance-schema FALSE
 performance-schema-accounts-size -1
 performance-schema-consumer-events-stages-current FALSE

mysys/my_getopt.c

@@ -86,7 +86,6 @@ my_bool my_getopt_prefix_matching= 1;
 my_bool my_handle_options_init_variables = 1;
 
 my_getopt_value my_getopt_get_addr= 0;
-my_getopt_adjust my_getopt_adjust_value= 0;
 
 static void default_reporter(enum loglevel level, const char *format, ...)
 {
@@ -899,9 +898,6 @@ static int setval(const struct my_option *opts, void *value, char *argument,
     };
   }
 
-  if (opts->var_type & GET_ADJUST_VALUE)
-    (*my_getopt_adjust_value)(opts, value);
-
   validate_value(opts->name, argument, option_file);
 
   DBUG_RETURN(0);

sql/mysqld.cc

@@ -4863,6 +4863,25 @@ init_gtid_pos_auto_engines(void)
   return 0;
 }
 
+
+#define us_to_ms(X) if (X > 0) X/= 1000;
+static int adjust_optimizer_costs(void *, OPTIMIZER_COSTS *oc, void *)
+{
+  us_to_ms(oc->disk_read_cost);
+  us_to_ms(oc->index_block_copy_cost);
+  us_to_ms(oc->key_cmp_cost);
+  us_to_ms(oc->key_copy_cost);
+  us_to_ms(oc->key_lookup_cost);
+  us_to_ms(oc->key_next_find_cost);
+  us_to_ms(oc->row_copy_cost);
+  us_to_ms(oc->row_lookup_cost);
+  us_to_ms(oc->row_next_find_cost);
+  us_to_ms(oc->rowid_cmp_cost);
+  us_to_ms(oc->rowid_copy_cost);
+  return 0;
+}
+
+
 #define MYSQL_COMPATIBILITY_OPTION(option) \
   { option, OPT_MYSQL_COMPATIBILITY, \
    0, 0, 0, 0, GET_STR, OPT_ARG, 0, 0, 0, 0, 0, 0 }
@@ -5207,8 +5226,15 @@ static int init_server_components()
 
   tc_log= 0; // ha_initialize_handlerton() needs that
 
-  if (!opt_abort && ddl_log_initialize())
-    unireg_abort(1);
+  if (!opt_abort)
+  {
+    if (ddl_log_initialize())
+      unireg_abort(1);
+
+    process_optimizer_costs((process_optimizer_costs_t)adjust_optimizer_costs, 0);
+    us_to_ms(global_system_variables.optimizer_where_cost);
+    us_to_ms(global_system_variables.optimizer_scan_setup_cost);
+  }
 
   if (plugin_init(&remaining_argc, remaining_argv,
                   (opt_noacl ? PLUGIN_INIT_SKIP_PLUGIN_TABLE : 0) |
@@ -8547,31 +8573,6 @@ mysql_getopt_value(const char *name, uint length,
 }
 
 
-static void
-mariadb_getopt_adjust_value(const struct my_option *option, void *value)
-{
-  switch (option->id) {
-  case OPT_COSTS_DISK_READ_COST:
-  case OPT_COSTS_INDEX_BLOCK_COPY_COST:
-  case OPT_COSTS_KEY_CMP_COST:
-  case OPT_COSTS_KEY_COPY_COST:
-  case OPT_COSTS_KEY_LOOKUP_COST:
-  case OPT_COSTS_KEY_NEXT_FIND_COST:
-  case OPT_COSTS_DISK_READ_RATIO:
-  case OPT_COSTS_ROW_COPY_COST:
-  case OPT_COSTS_ROW_LOOKUP_COST:
-  case OPT_COSTS_ROW_NEXT_FIND_COST:
-  case OPT_COSTS_ROWID_CMP_COST:
-  case OPT_COSTS_ROWID_COPY_COST:
-    /* Value from command is line given in usec. Convert to ms */
-    *(double*) value= *(double*) value/1000.0;
-    break;
-  default:
-    break;
-  }
-}
-
-
 static void option_error_reporter(enum loglevel level, const char *format, ...)
 {
   va_list args;
@@ -8610,7 +8611,6 @@ static int get_options(int *argc_ptr, char ***argv_ptr)
 
   my_getopt_get_addr= mysql_getopt_value;
   my_getopt_error_reporter= option_error_reporter;
-  my_getopt_adjust_value= mariadb_getopt_adjust_value;
 
   /* prepare all_options array */
   my_init_dynamic_array(PSI_INSTRUMENT_ME, &all_options, sizeof(my_option),

sql/sys_vars.inl

@@ -1250,14 +1250,12 @@ public:
           on_update_function on_update_func=0,
           const char *substitute=0)
     :Sys_var_double(name_arg, comment, flag_args, off, size, getopt,
-                   min_val, max_val, def_val, lock,
+                   min_val, max_val, def_val * arg_cost_adjust, lock,
                    binlog_status_arg,
                    on_check_func,
                    on_update_func,
                    substitute)
   {
-    if (arg_cost_adjust == 1000)
-      option.var_type|= GET_ADJUST_VALUE;
     cost_adjust= (double) arg_cost_adjust;
   }
   bool session_update(THD *thd, set_var *var)
@@ -1275,8 +1273,7 @@ public:
 
   void global_save_default(THD *thd, set_var *var)
   {
-    var->save_result.double_value= getopt_ulonglong2double(option.def_value)*
-      cost_adjust;
+    var->save_result.double_value= getopt_ulonglong2double(option.def_value);
   }
   const uchar *tmp_ptr(THD *thd) const
   {
@@ -1312,33 +1309,20 @@ public:
 #define COST_VAR(X) GLOBAL_VAR(default_optimizer_costs.X)
 #define cost_var_ptr(KC, OFF) (((uchar*)(KC))+(OFF))
 #define cost_var(KC, OFF) (*(double*)cost_var_ptr(KC, OFF))
-typedef bool (*cost_update_function)(THD *, OPTIMIZER_COSTS *, ptrdiff_t,
-                                     double, double);
-
-static bool update_cost(THD *thd, OPTIMIZER_COSTS *key_cache,
-                        ptrdiff_t offset, double new_value, double cost_adjust)
-{
-  cost_var(key_cache, offset)= new_value / cost_adjust;
-  return 0;
-}
-
 
 class Sys_var_engine_optimizer_cost: public Sys_var_optimizer_cost
 {
-  cost_update_function cost_update;
   public:
   Sys_var_engine_optimizer_cost(const char *name_arg,
           const char *comment, int flag_args, ptrdiff_t off, size_t size,
           CMD_LINE getopt,
           double min_val, double max_val, double def_val,
           long cost_adjust, PolyLock *lock= 0,
-          cost_update_function on_update_func= update_cost,
           const char *substitute=0)
     : Sys_var_optimizer_cost(name_arg, comment, flag_args, off, size,
                              getopt, min_val, max_val, def_val, cost_adjust,
                              lock, VARIABLE_NOT_IN_BINLOG, 0,
-                             0, substitute),
-     cost_update(on_update_func)
+                             0, substitute)
   {
     option.var_type|= GET_ASK_ADDR;
     option.value= (uchar**)1; // crash me, please
@@ -1351,7 +1335,6 @@ class Sys_var_engine_optimizer_cost: public Sys_var_optimizer_cost
     double new_value= var->save_result.double_value;
     LEX_CSTRING *base_name= &var->base;
     OPTIMIZER_COSTS *optimizer_costs;
-    bool res;
 
     /* If no basename, assume it's for the default costs */
     if (!base_name->length)
@@ -1364,9 +1347,9 @@ class Sys_var_engine_optimizer_cost: public Sys_var_optimizer_cost
       mysql_mutex_unlock(&LOCK_optimizer_costs);
       return true;
     }
-    res= cost_update(thd, optimizer_costs, offset, new_value, cost_adjust);
+    cost_var(optimizer_costs, offset)= new_value / cost_adjust;
     mysql_mutex_unlock(&LOCK_optimizer_costs);
-    return res;
+    return 0;
   }
   const uchar *global_value_ptr(THD *thd, const LEX_CSTRING *base) const
   {