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reporting empty result added in case of max/min optimisation of ALL/ANY/SOME subqueries

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fixed null processing in NOT operation used in ALL subquery (Bug #6247)
This commit is contained in:
bell@sanja.is.com.ua 2004-11-18 18:10:07 +02:00
commit f5e253dc2f
11 changed files with 230 additions and 26 deletions
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9
sql/item_sum.h
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@ -403,19 +403,22 @@ class Item_sum_hybrid :public Item_sum
int cmp_sign;
table_map used_table_cache;
CHARSET_INFO *cmp_charset;
bool was_values; // was checked at least some values (for max/min only)
public:
Item_sum_hybrid(Item *item_par,int sign)
:Item_sum(item_par), sum(0.0), sum_int(0),
hybrid_type(INT_RESULT), hybrid_field_type(FIELD_TYPE_LONGLONG),
cmp_sign(sign), used_table_cache(~(table_map) 0),
cmp_charset(&my_charset_bin)
cmp_charset(&my_charset_bin), was_values(TRUE)
{}
Item_sum_hybrid(THD *thd, Item_sum_hybrid *item):
Item_sum(thd, item), value(item->value),
sum(item->sum), sum_int(item->sum_int), hybrid_type(item->hybrid_type),
hybrid_field_type(item->hybrid_field_type),cmp_sign(item->cmp_sign),
used_table_cache(item->used_table_cache), cmp_charset(item->cmp_charset) {}
used_table_cache(item->used_table_cache), cmp_charset(item->cmp_charset),
was_values(TRUE)
{}
bool fix_fields(THD *, TABLE_LIST *, Item **);
table_map used_tables() const { return used_table_cache; }
bool const_item() const { return !used_table_cache; }
@ -434,6 +437,8 @@ class Item_sum_hybrid :public Item_sum
void min_max_update_real_field();
void min_max_update_int_field();
void cleanup();
bool any_value() { return was_values; }
void no_rows_in_result();
};