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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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2
sql/protocol.cc
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@ -1248,7 +1248,7 @@ bool Protocol_text::send_out_parameters(List<Item_param> *sp_params)
continue; // It's an IN-parameter.
Item_func_set_user_var *suv=
new Item_func_set_user_var(*user_var_name, item_param);
new Item_func_set_user_var(thd, *user_var_name, item_param);
/*
Item_func_set_user_var is not fixed after construction, call
fix_fields().