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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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9
sql/sql_admin.cc
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@ -326,13 +326,14 @@ static bool mysql_admin_table(THD* thd, TABLE_LIST* tables,
DBUG_ENTER("mysql_admin_table");
DBUG_PRINT("enter", ("extra_open_options: %u", extra_open_options));
field_list.push_back(item = new Item_empty_string("Table", NAME_CHAR_LEN*2));
field_list.push_back(item = new Item_empty_string(thd, "Table",
NAME_CHAR_LEN * 2));
item->maybe_null = 1;
field_list.push_back(item = new Item_empty_string("Op", 10));
field_list.push_back(item = new Item_empty_string(thd, "Op", 10));
item->maybe_null = 1;
field_list.push_back(item = new Item_empty_string("Msg_type", 10));
field_list.push_back(item = new Item_empty_string(thd, "Msg_type", 10));
item->maybe_null = 1;
field_list.push_back(item = new Item_empty_string("Msg_text",
field_list.push_back(item = new Item_empty_string(thd, "Msg_text",
SQL_ADMIN_MSG_TEXT_SIZE));
item->maybe_null = 1;
if (protocol->send_result_set_metadata(&field_list,