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group_by.result:

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WL3527: disable wrong optimization.
sql_select.cc:
  WL#3527: disable wrong optimization.
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gkodinov/kgeorge@magare.gmz
2007-03-12 13:20:46 +02:00
parent a474f33494
commit f2ce1445e1
2 changed files with 1 additions and 13 deletions
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2
mysql-test/r/group_by.result
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@ -1067,7 +1067,7 @@ id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL PRIMARY 4 NULL 256 Using index 1 SIMPLE t1 index NULL PRIMARY 4 NULL 256 Using index
EXPLAIN SELECT a FROM t1 IGNORE INDEX FOR ORDER BY (PRIMARY,i2) ORDER BY a; EXPLAIN SELECT a FROM t1 IGNORE INDEX FOR ORDER BY (PRIMARY,i2) ORDER BY a;
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL PRIMARY 4 NULL 256 Using index 1 SIMPLE t1 index NULL PRIMARY 4 NULL 256 Using index; Using filesort
EXPLAIN SELECT a FROM t1 IGNORE INDEX FOR ORDER BY (PRIMARY) EXPLAIN SELECT a FROM t1 IGNORE INDEX FOR ORDER BY (PRIMARY)
IGNORE INDEX FOR GROUP BY (i2) GROUP BY a; IGNORE INDEX FOR GROUP BY (i2) GROUP BY a;
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra

12
sql/sql_select.cc
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@ -12393,24 +12393,12 @@ test_if_skip_sort_order(JOIN_TAB *tab,ORDER *order,ha_rows select_limit,
DBUG_ENTER("test_if_skip_sort_order"); DBUG_ENTER("test_if_skip_sort_order");
LINT_INIT(ref_key_parts); LINT_INIT(ref_key_parts);
/* Check which keys can be used to resolve ORDER BY. */
usable_keys= table->keys_in_use_for_query;
/* /*
Keys disabled by ALTER TABLE ... DISABLE KEYS should have already Keys disabled by ALTER TABLE ... DISABLE KEYS should have already
been taken into account. been taken into account.
*/ */
usable_keys= *map; usable_keys= *map;
/*
If there is a covering index, and we have IGNORE INDEX FOR GROUP/ORDER
and this index is used for the JOIN part, then we have to ignore the
IGNORE INDEX FOR GROUP/ORDER
*/
if (table->key_read ||
(table->covering_keys.is_set(tab->index) && !table->no_keyread))
usable_keys.set_bit (tab->index);
for (ORDER *tmp_order=order; tmp_order ; tmp_order=tmp_order->next) for (ORDER *tmp_order=order; tmp_order ; tmp_order=tmp_order->next)
{ {
Item *item= (*tmp_order->item)->real_item(); Item *item= (*tmp_order->item)->real_item();