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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_partition.cc
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@@ -202,7 +202,7 @@ Item* convert_charset_partition_constant(Item *item, CHARSET_INFO *cs)
TABLE_LIST *save_list= context->table_list;
const char *save_where= thd->where;
item= item->safe_charset_converter(cs);
item= item->safe_charset_converter(thd, cs);
context->table_list= NULL;
thd->where= "convert character set partition constant";
if (!item || item->fix_fields(thd, (Item**)NULL))