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MDEV-34060 Unexpected behavior upon reading I_S.ALL_PLUGINS under limited tmp space.

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This commit is contained in:
Monty
2024-05-03 10:27:35 +03:00
committed by Sergei Golubchik
parent 7d1467e9e9
commit 46751d4b81
4 changed files with 75 additions and 8 deletions
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48
sql/sql_show.cc
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@@ -345,11 +345,32 @@ int fill_plugins(THD *thd, TABLE_LIST *tables, COND *cond)
}
/* Ignore common errors from plugin load */
class plugin_show_error_handler : public Internal_error_handler
{
public:
bool handle_condition(THD *thd,
uint sql_errno,
const char* sqlstate,
Sql_condition::enum_warning_level *level,
const char* msg,
Sql_condition ** cond_hdl)
{
if (sql_errno == ER_CANT_FIND_DL_ENTRY)
return true;
return false;
}
};
int fill_all_plugins(THD *thd, TABLE_LIST *tables, COND *cond)
{
DBUG_ENTER("fill_all_plugins");
TABLE *table= tables->table;
LOOKUP_FIELD_VALUES lookup;
plugin_show_error_handler err_handler;
const char *wstr, *wend;
if (get_lookup_field_values(thd, cond, true, tables, &lookup))
DBUG_RETURN(0);
@@ -364,10 +385,16 @@ int fill_all_plugins(THD *thd, TABLE_LIST *tables, COND *cond)
DBUG_RETURN(1);
}
if (!lookup.db_value.str)
plugin_dl_foreach(thd, 0, show_plugins, table);
thd->push_internal_handler(&err_handler);
const char *wstr= lookup.db_value.str, *wend= wstr + lookup.db_value.length;
if (!lookup.db_value.str)
{
if (plugin_dl_foreach(thd, 0, show_plugins, table) && thd->is_error())
goto end;
}
wstr= lookup.db_value.str;
wend= wstr + lookup.db_value.length;
for (size_t i=0; i < dirp->number_of_files; i++)
{
FILEINFO *file= dirp->dir_entry+i;
@@ -394,12 +421,14 @@ int fill_all_plugins(THD *thd, TABLE_LIST *tables, COND *cond)
}
}
plugin_dl_foreach(thd, &dl, show_plugins, table);
thd->clear_error();
if (plugin_dl_foreach(thd, &dl, show_plugins, table) && thd->is_error())
break;
}
end:
thd->pop_internal_handler();
my_dirend(dirp);
DBUG_RETURN(0);
DBUG_RETURN(thd->is_error());
}
@@ -4810,10 +4839,15 @@ fill_schema_table_by_open(THD *thd, MEM_ROOT *mem_root,
&& thd->get_stmt_da()->sql_errno() != ER_WRONG_OBJECT
&& thd->get_stmt_da()->sql_errno() != ER_NOT_SEQUENCE;
if (!run)
{
thd->clear_error();
result= false;
}
else if (!ext_error_handling)
{
convert_error_to_warning(thd);
result= false;
result= false;
}
}
}