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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.


configure.in:
  Updated version number
libmysqld/libmysqld.c:
  Portability fix (for windows)
mysql-test/r/func_group.result:
  Added test case for MIN/MAX problems
mysql-test/t/func_group.test:
  Added test case for MIN/MAX problems
sql/item.h:
  Fix for MIN/MAX with empty tables
sql/item_sum.h:
  Fix for MIN/MAX with empty tables
sql/opt_sum.cc:
  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.
sql/sql_select.cc:
  Fix for MIN/MAX with empty tables
This commit is contained in:
unknown
2003-02-03 20:20:32 +02:00
parent ac4dacaa29
commit c73dcb5e30
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 */