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MWL#182: Explain running statements: address review feedback

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- Add Monty Program Ab copyright in new files
- Change Apc_target::make_apc_call() to accept a C++-style
  functor (instead of C-style function + parameter)
This commit is contained in:
Sergey Petrunya
2012-06-28 13:58:37 +04:00
parent 66c62de103
commit c62c0c5516
5 changed files with 57 additions and 34 deletions
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23
sql/sql_class.cc
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@ -3330,33 +3330,32 @@ void THD::restore_active_arena(Query_arena *set, Query_arena *backup)
we're producing EXPLAIN for.
*/
void Show_explain_request::get_explain_data(void *arg)
void Show_explain_request::call_in_target_thread()
{
Show_explain_request *req= (Show_explain_request*)arg;
Query_arena backup_arena;
THD *target_thd= req->target_thd;
bool printed_anything= FALSE;
/*
Change the arena because JOIN::print_explain and co. are going to allocate
items. Let them allocate them on our arena.
*/
target_thd->set_n_backup_active_arena((Query_arena*)req->request_thd,
target_thd->set_n_backup_active_arena((Query_arena*)request_thd,
&backup_arena);
req->query_str.copy(target_thd->query(),
target_thd->query_length(),
&my_charset_bin);
query_str.copy(target_thd->query(),
target_thd->query_length(),
&my_charset_bin);
if (target_thd->lex->unit.print_explain(req->explain_buf, 0 /* explain flags*/,
if (target_thd->lex->unit.print_explain(explain_buf, 0 /* explain flags*/,
&printed_anything))
req->failed_to_produce= TRUE;
{
failed_to_produce= TRUE;
}
if (!printed_anything)
req->failed_to_produce= TRUE;
failed_to_produce= TRUE;
target_thd->restore_active_arena((Query_arena*)req->request_thd,
&backup_arena);
target_thd->restore_active_arena((Query_arena*)request_thd, &backup_arena);
}