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Fix for MIN/MAX with empty tables

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MIN(key_column) could in some cases return NULL on a column with NULL and other values.
MIN(key_column) and MAX(key_column) could in some cases return wrong values when used in OUTER JOIN.
This commit is contained in:
monty@mashka.mysql.fi
2003-02-03 20:20:32 +02:00
parent c42e94a6e6
commit e3cd63521c
8 changed files with 158 additions and 27 deletions
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6
sql/sql_select.cc
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@ -3104,7 +3104,13 @@ return_zero_rows(JOIN *join, select_result *result,TABLE_LIST *tables,
if (!(result->send_fields(fields,1)))
{
if (send_row)
{
List_iterator_fast<Item> it(fields);
Item *item;
while ((item= it++))
item->no_rows_in_result();
result->send_data(fields);
}
if (tables) // Not from do_select()
{
/* Close open cursors */