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SHOW EXPLAIN DELETE, post merge fixes

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- Fix asserts, make sure that mysql_delete() operates on 
  thd->apc_target correctly* in all kinds of special cases 
  * - correctly means that one must switch it OFF iff it
  was switched ON.
- Added a few asserts to catch similar errors.
This commit is contained in:
Sergey Petrunya 2013-05-27 13:53:18 +04:00
parent 99890bafe3
commit 9718b9763d
3 changed files with 11 additions and 0 deletions
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1
sql/my_apc.cc
View File

@ -70,6 +70,7 @@ void Apc_target::enable()
void Apc_target::disable()
{
bool process= FALSE;
DBUG_ASSERT(enabled);
mysql_mutex_lock(LOCK_thd_data_ptr);
if (!(--enabled))
process= TRUE;

3
sql/sql_parse.cc
View File

@ -807,7 +807,9 @@ bool do_command(THD *thd)
my_net_set_read_timeout(net, thd->variables.net_read_timeout);
DBUG_ASSERT(packet_length);
DBUG_ASSERT(!thd->apc_target.is_enabled());
return_value= dispatch_command(command, thd, packet+1, (uint) (packet_length-1));
DBUG_ASSERT(!thd->apc_target.is_enabled());
out:
DBUG_RETURN(return_value);
@ -1109,6 +1111,7 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
ulong length= (ulong)(packet_end - beginning_of_next_stmt);
log_slow_statement(thd);
DBUG_ASSERT(!thd->apc_target.is_enabled());
/* Remove garbage at start of query */
while (length > 0 && my_isspace(thd->charset(), *beginning_of_next_stmt))

7
sql/sql_update.cc
View File

@ -279,6 +279,7 @@ int mysql_update(THD *thd,
Update_plan query_plan;
query_plan.index= MAX_KEY;
query_plan.using_filesort= FALSE;
bool apc_target_enabled= false; // means was enabled *by code this function*
DBUG_ENTER("mysql_update");
if (open_tables(thd, &table_list, &table_count, 0))
@ -497,6 +498,7 @@ int mysql_update(THD *thd,
goto exit_without_my_ok;
thd->apc_target.enable();
apc_target_enabled= true;
DBUG_EXECUTE_IF("show_explain_probe_update_exec_start",
dbug_serve_apcs(thd, 1););
@ -923,6 +925,7 @@ int mysql_update(THD *thd,
thd->transaction.stmt.modified_non_trans_table= TRUE;
thd->apc_target.disable(); //psergey-todo.
apc_target_enabled= false;
end_read_record(&info);
delete select;
thd_proc_info(thd, "end");
@ -996,6 +999,9 @@ int mysql_update(THD *thd,
DBUG_RETURN((error >= 0 || thd->is_error()) ? 1 : 0);
err:
if (apc_target_enabled)
thd->apc_target.disable();
delete select;
free_underlaid_joins(thd, select_lex);
table->disable_keyread();
@ -1003,6 +1009,7 @@ err:
DBUG_RETURN(1);
exit_without_my_ok:
DBUG_ASSERT(!apc_target_enabled);
thd->lex->upd_del_plan= &query_plan;
select_send *result;