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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/sql_expression_cache.cc
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@ -161,7 +161,7 @@ void Expression_cache_tmptable::init()
goto error;
}
if (!(cached_result= new Item_field(cache_table->field[0])))
if (!(cached_result= new Item_field(table_thd, cache_table->field[0])))
{
DBUG_PRINT("error", ("Creating Item_field failed"));
goto error;