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MDEV-8010 - Avoid sql_alloc() in Items (Patch #1)

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Added mandatory thd parameter to Item (and all derivative classes) constructor.
Added thd parameter to all routines that may create items.
Also removed "current_thd" from Item::Item. This reduced number of
pthread_getspecific() calls from 290 to 177 per OLTP RO transaction.
This commit is contained in:
Sergey Vojtovich
2015-08-11 11:18:38 +04:00
parent 4374da63f0
commit 31e365efae
71 changed files with 2724 additions and 2474 deletions
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7
sql/sql_error.cc
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@@ -818,9 +818,10 @@ bool mysqld_show_warnings(THD *thd, ulong levels_to_show)
DBUG_ASSERT(thd->get_stmt_da()->is_warning_info_read_only());
field_list.push_back(new Item_empty_string("Level", 7));
field_list.push_back(new Item_return_int("Code",4, MYSQL_TYPE_LONG));
field_list.push_back(new Item_empty_string("Message",MYSQL_ERRMSG_SIZE));
field_list.push_back(new Item_empty_string(thd, "Level", 7));
field_list.push_back(new Item_return_int(thd, "Code", 4, MYSQL_TYPE_LONG));
field_list.push_back(new Item_empty_string(thd, "Message",
MYSQL_ERRMSG_SIZE));
if (thd->protocol->send_result_set_metadata(&field_list,
Protocol::SEND_NUM_ROWS | Protocol::SEND_EOF))