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Merge epotemkin@bk-internal.mysql.com:/home/bk/mysql-5.0-opt

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into  moonbone.local:/mnt/gentoo64/work/27590-bug-5.0-opt-mysql
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evgen@moonbone.local
2007-04-27 21:07:05 +04:00
parent f4ec0f1cbe 4747fa0c03
commit 72e53ede3a
15 changed files with 444 additions and 40 deletions
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18
sql/sql_select.cc
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@ -8667,17 +8667,13 @@ static bool
test_if_equality_guarantees_uniqueness(Item *l, Item *r)
{
return r->const_item() &&
/* elements must be of the same result type */
(r->result_type() == l->result_type() ||
/* or dates compared to longs */
(((l->type() == Item::FIELD_ITEM &&
((Item_field *)l)->field->can_be_compared_as_longlong()) ||
(l->type() == Item::FUNC_ITEM &&
((Item_func *)l)->result_as_longlong())) &&
r->result_type() == INT_RESULT))
/* and must have the same collation if compared as strings */
&& (l->result_type() != STRING_RESULT ||
l->collation.collation == r->collation.collation);
/* elements must be compared as dates */
(Arg_comparator::can_compare_as_dates(l, r, 0) ||
/* or of the same result type */
(r->result_type() == l->result_type() &&
/* and must have the same collation if compared as strings */
(l->result_type() != STRING_RESULT ||
l->collation.collation == r->collation.collation)));
}
/*