evgen@moonbone.local a4a3215a44 Fix bug #14482 Wrongly applied optimization in resolve_const_item() caused ...

crash

resolve_const_item() substitutes item which will evaluate to constant with
equvalent constant item, basing on the item's result type. In this case
subselect was resolved as constant, and resolve_const_item() was substituting
it's result's Item_caches to Item_null. Later Item_cache's function was called
for Item_null object, which caused server crash.

resolve_const_item() now substitutes constants for items with 
result_type == ROW_RESULT only for Item_rows.

2005-11-24 19:16:51 +03:00

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