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MDEV-6138 show sysvar's help in I_S tables

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INFORMATION_SCHEMA.SYSTEM_VARIABLES
This commit is contained in:
Sergei Golubchik
2014-09-03 20:16:51 +02:00
parent beb2422ad8
commit 513f5840f8
36 changed files with 12327 additions and 73 deletions
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9
sql/sql_plugin.cc
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@@ -266,6 +266,8 @@ public:
{ return do_value_ptr(thd, OPT_SESSION, base); }
uchar* global_value_ptr(THD *thd, const LEX_STRING *base)
{ return do_value_ptr(thd, OPT_GLOBAL, base); }
uchar *default_value_ptr(THD *thd)
{ return do_value_ptr(thd, OPT_DEFAULT, 0); }
bool do_check(THD *thd, set_var *var);
virtual void session_save_default(THD *thd, set_var *var) {}
virtual void global_save_default(THD *thd, set_var *var) {}
@@ -3239,6 +3241,9 @@ sys_var_pluginvar::sys_var_pluginvar(sys_var_chain *chain, const char *name_arg,
uchar* sys_var_pluginvar::real_value_ptr(THD *thd, enum_var_type type)
{
if (type == OPT_DEFAULT)
return (uchar*)&option.def_value;
DBUG_ASSERT(thd || (type == OPT_GLOBAL));
if (plugin_var->flags & PLUGIN_VAR_THDLOCAL)
{
@@ -3307,7 +3312,7 @@ bool sys_var_pluginvar::session_update(THD *thd, set_var *var)
DBUG_ASSERT(thd == current_thd);
mysql_mutex_lock(&LOCK_global_system_variables);
void *tgt= real_value_ptr(thd, var->type);
void *tgt= real_value_ptr(thd, OPT_SESSION);
const void *src= var->value ? (void*)&var->save_result
: (void*)real_value_ptr(thd, OPT_GLOBAL);
mysql_mutex_unlock(&LOCK_global_system_variables);
@@ -3322,7 +3327,7 @@ bool sys_var_pluginvar::global_update(THD *thd, set_var *var)
DBUG_ASSERT(!is_readonly());
mysql_mutex_assert_owner(&LOCK_global_system_variables);
void *tgt= real_value_ptr(thd, var->type);
void *tgt= real_value_ptr(thd, OPT_GLOBAL);
const void *src= &var->save_result;
if (!var->value)