diff options
Diffstat (limited to 'sql/set_var.cc')
| -rw-r--r-- | sql/set_var.cc | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/sql/set_var.cc b/sql/set_var.cc index c1071c90223..21500666f49 100644 --- a/sql/set_var.cc +++ b/sql/set_var.cc @@ -487,6 +487,8 @@ static sys_var_thd_ulong sys_optimizer_prune_level(&vars, "optimizer_prun &SV::optimizer_prune_level); static sys_var_thd_ulong sys_optimizer_search_depth(&vars, "optimizer_search_depth", &SV::optimizer_search_depth); +static sys_var_thd_optimizer_switch sys_optimizer_switch(&vars, "optimizer_switch", + &SV::optimizer_switch); static sys_var_const sys_pid_file(&vars, "pid_file", OPT_GLOBAL, SHOW_CHAR, (uchar*) pidfile_name); @@ -3943,6 +3945,97 @@ ulong fix_sql_mode(ulong sql_mode) } +bool +sys_var_thd_optimizer_switch:: +symbolic_mode_representation(THD *thd, ulonglong val, LEX_STRING *rep) +{ + char buff[STRING_BUFFER_USUAL_SIZE*8]; + String tmp(buff, sizeof(buff), &my_charset_latin1); + int i; + ulonglong bit; + tmp.length(0); + + for (i= 0, bit=1; bit != OPTIMIZER_SWITCH_LAST; i++, bit= bit << 1) + { + tmp.append(optimizer_switch_typelib.type_names[i], + optimizer_switch_typelib.type_lengths[i]); + tmp.append('='); + tmp.append((val & bit)? "on":"off"); + tmp.append(','); + } + + if (tmp.length()) + tmp.length(tmp.length() - 1); /* trim the trailing comma */ + + rep->str= thd->strmake(tmp.ptr(), tmp.length()); + + rep->length= rep->str ? tmp.length() : 0; + + return rep->length != tmp.length(); +} + + +uchar *sys_var_thd_optimizer_switch::value_ptr(THD *thd, enum_var_type type, + LEX_STRING *base) +{ + LEX_STRING opts; + ulonglong val= ((type == OPT_GLOBAL) ? global_system_variables.*offset : + thd->variables.*offset); + (void) symbolic_mode_representation(thd, val, &opts); + return (uchar *) opts.str; +} + + +/* + Check (and actually parse) string representation of @@optimizer_switch. +*/ + +bool sys_var_thd_optimizer_switch::check(THD *thd, set_var *var) +{ + bool not_used; + char buff[STRING_BUFFER_USUAL_SIZE], *error= 0; + uint error_len= 0; + String str(buff, sizeof(buff), system_charset_info), *res; + + if (!(res= var->value->val_str(&str))) + { + strmov(buff, "NULL"); + goto err; + } + + if (res->length() == 0) + { + buff[0]= 0; + goto err; + } + + var->save_result.ulong_value= + (ulong)find_set_from_flags(&optimizer_switch_typelib, + optimizer_switch_typelib.count, + thd->variables.optimizer_switch, + global_system_variables.optimizer_switch, + res->c_ptr_safe(), res->length(), NULL, + &error, &error_len, ¬_used); + if (error_len) + { + strmake(buff, error, min(sizeof(buff) - 1, error_len)); + goto err; + } + return FALSE; +err: + my_error(ER_WRONG_VALUE_FOR_VAR, MYF(0), name, buff); + return TRUE; +} + + +void sys_var_thd_optimizer_switch::set_default(THD *thd, enum_var_type type) +{ + if (type == OPT_GLOBAL) + global_system_variables.*offset= OPTIMIZER_SWITCH_DEFAULT; + else + thd->variables.*offset= global_system_variables.*offset; +} + /**************************************************************************** Named list handling ****************************************************************************/ |