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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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sql/sql_analyse.h
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@ -356,7 +356,7 @@ public:
}
}
virtual void add() {}
virtual bool change_columns(List<Item> &fields);
virtual bool change_columns(THD *thd, List<Item> &fields);
virtual int send_row(List<Item> &field_list);
virtual void end_group(void) {}
virtual int end_of_records(void);