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More thorough correction of the patch that complemented the patch for mdev-10855

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This commit is contained in:
Igor Babaev
2017-08-24 20:49:07 -07:00
parent 0336655918
commit f2033df6ac
1 changed files with 7 additions and 8 deletions
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15
sql/sql_window.cc
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@ -334,12 +334,12 @@ ORDER *st_select_lex::find_common_window_func_partition_fields(THD *thd)
Item *item;
DBUG_ASSERT(window_funcs.elements);
List_iterator_fast<Item_window_func> it(window_funcs);
Item_window_func *wf= it++;
if (!wf->window_spec->partition_list)
Item_window_func *first_wf= it++;
if (!first_wf->window_spec->partition_list)
return 0;
List<Item> common_fields;
uint first_partition_elements= 0;
for (ord= wf->window_spec->partition_list->first; ord; ord= ord->next)
for (ord= first_wf->window_spec->partition_list->first; ord; ord= ord->next)
{
if ((*ord->item)->real_item()->type() == Item::FIELD_ITEM)
common_fields.push_back(*ord->item, thd->mem_root);
@ -347,8 +347,9 @@ ORDER *st_select_lex::find_common_window_func_partition_fields(THD *thd)
}
if (window_specs.elements == 1 &&
common_fields.elements == first_partition_elements)
return wf->window_spec->partition_list->first;
return first_wf->window_spec->partition_list->first;
List_iterator<Item> li(common_fields);
Item_window_func *wf;
while (common_fields.elements && (wf= it++))
{
if (!wf->window_spec->partition_list)
@ -368,11 +369,9 @@ ORDER *st_select_lex::find_common_window_func_partition_fields(THD *thd)
if (!common_fields.elements)
return 0;
if (common_fields.elements == first_partition_elements)
return wf->window_spec->partition_list->first;
return first_wf->window_spec->partition_list->first;
SQL_I_List<ORDER> res_list;
it.rewind();
wf= it++;
for (ord= wf->window_spec->partition_list->first, item= li++;
for (ord= first_wf->window_spec->partition_list->first, item= li++;
ord; ord= ord->next)
{
if (item != *ord->item)