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BUG#33794 "MySQL crashes executing specific query":

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The problem occurred when one had a subquery that had an equality X=Y where 
Y referred to a named select list expression from the parent select. MySQL 
crashed when trying to use the X=Y equality for ref-based access. 

Fixed by allowing non-Item_field items in the described case.
This commit is contained in:
sergefp@mysql.com
2008-01-18 22:50:36 +03:00
parent 8eb74b1f5f
commit d56ac2f37b
3 changed files with 105 additions and 1 deletions
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3
sql/sql_select.cc
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@ -5379,7 +5379,8 @@ get_store_key(THD *thd, KEYUSE *keyuse, table_map used_tables,
(keyuse->val->type() == Item::REF_ITEM &&
((Item_ref*)keyuse->val)->ref_type() == Item_ref::OUTER_REF &&
(*(Item_ref**)((Item_ref*)keyuse->val)->ref)->ref_type() ==
Item_ref::DIRECT_REF) )
Item_ref::DIRECT_REF &&
keyuse->val->real_item()->type() == Item::FIELD_ITEM))
return new store_key_field(thd,
key_part->field,
key_buff + maybe_null,