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Ported WL#3220 to mysql-next-mr.

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This commit is contained in:
Georgi Kodinov
2009-09-28 10:21:25 +03:00
parent b21cd91780
commit 7aa8cd7a11
14 changed files with 1620 additions and 882 deletions
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10
sql/opt_sum.cc
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@ -355,10 +355,13 @@ int opt_sum_query(TABLE_LIST *tables, List<Item> &all_fields,COND *conds)
const_result= 0;
break;
}
item_sum->set_aggregator (item_sum->with_distinct ?
Aggregator::DISTINCT_AGGREGATOR :
Aggregator::SIMPLE_AGGREGATOR);
if (!count)
{
/* If count == 0, then we know that is_exact_count == TRUE. */
((Item_sum_min*) item_sum)->clear(); /* Set to NULL. */
((Item_sum_min*) item_sum)->aggregator_clear(); /* Set to NULL. */
}
else
((Item_sum_min*) item_sum)->reset(); /* Set to the constant value. */
@ -443,10 +446,13 @@ int opt_sum_query(TABLE_LIST *tables, List<Item> &all_fields,COND *conds)
const_result= 0;
break;
}
item_sum->set_aggregator (item_sum->with_distinct ?
Aggregator::DISTINCT_AGGREGATOR :
Aggregator::SIMPLE_AGGREGATOR);
if (!count)
{
/* If count != 1, then we know that is_exact_count == TRUE. */
((Item_sum_max*) item_sum)->clear(); /* Set to NULL. */
((Item_sum_max*) item_sum)->aggregator_clear(); /* Set to NULL. */
}
else
((Item_sum_max*) item_sum)->reset(); /* Set to the constant value. */