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MDEV-31073 Server crash, assertion `table != 0 && view->field_translation != 0' failure with ROWNUM and view

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Now the same rule applied to vews and derived tables. So we should
allow merge of views (and derived) in queries with rownum, because
it do not change results, only makes query plans better.
This commit is contained in:
Oleksandr Byelkin
2023-04-21 10:55:14 +02:00
parent 06b443be34
commit 2eb7bf1ec3
6 changed files with 95 additions and 3 deletions
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4
sql/sql_select.cc
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@@ -28739,7 +28739,7 @@ void st_select_lex::print_item_list(THD *thd, String *str,
outer_select() can not be used here because it is for name resolution
and will return NULL at any end of name resolution chain (view/derived)
*/
bool top_level= (get_master() == &thd->lex->unit);
bool top_level= is_query_topmost(thd);
List_iterator_fast<Item> it(item_list);
Item *item;
while ((item= it++))
@@ -28846,7 +28846,7 @@ void st_select_lex::print(THD *thd, String *str, enum_query_type query_type)
return;
}
bool top_level= (get_master() == &thd->lex->unit);
bool top_level= is_query_topmost(thd);
enum explainable_cmd_type sel_type= SELECT_CMD;
if (top_level)
sel_type= get_explainable_cmd_type(thd);