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MDEV-9787: Window functions: HAVING and GROUP BY

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- Hook window function computation into the right location.
- Add a testcase which shows that HAVING is now checked before
  the window function computation step.
This commit is contained in:
Sergei Petrunia
2016-03-28 20:53:09 +03:00
parent e88758330c
commit d146c2cedc
5 changed files with 71 additions and 12 deletions
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13
sql/sql_window.cc
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@ -1565,11 +1565,20 @@ bool Window_func_runner::exec(JOIN *join)
bool Window_funcs_computation::setup(THD *thd,
List<Item_window_func> *window_funcs)
List<Item_window_func> *window_funcs,
JOIN_TAB *tab)
{
List_iterator_fast<Item_window_func> it(*window_funcs);
Item_window_func *item_win;
Window_func_runner *runner;
SQL_SELECT *sel= NULL;
if (tab->filesort && tab->filesort->select)
{
sel= tab->filesort->select;
DBUG_ASSERT(!sel->quick);
}
// for each window function
while ((item_win= it++))
{
@ -1579,6 +1588,8 @@ bool Window_funcs_computation::setup(THD *thd,
{
return true;
}
/* Apply the same condition that the subsequent sort will */
runner->filesort->select= sel;
win_func_runners.push_back(runner, thd->mem_root);
}
return false;