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A bug fix for ORDER BY on table.column in provisional entire UNION

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ORDER clause, where table is one of union'ed tables.
This commit is contained in:
unknown 2002-11-30 22:53:50 +02:00
parent 0b36bbdf25
commit bbbae0dbf7
3 changed files with 11 additions and 2 deletions
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5
mysql-test/r/union.result
View file

@ -84,6 +84,11 @@ a b
3 c
2 b
1 a
(select a,b from t1 limit 2) union all (select a,b from t2 order by a limit 1) order by t1.b;
a b
1 a
2 b
3 c
explain (select a,b from t1 limit 2) union all (select a,b from t2 order by a limit 1) order by b desc;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 4

1
mysql-test/t/union.test
View file

@ -20,6 +20,7 @@ select 't1',b,count(*) from t1 group by b UNION select 't2',b,count(*) from t2 g
(select a,b from t1 limit 2) union all (select a,b from t2 order by a) limit 4;
(select a,b from t1 limit 2) union all (select a,b from t2 order by a limit 1);
(select a,b from t1 limit 2) union all (select a,b from t2 order by a limit 1) order by b desc;
(select a,b from t1 limit 2) union all (select a,b from t2 order by a limit 1) order by t1.b;
explain (select a,b from t1 limit 2) union all (select a,b from t2 order by a limit 1) order by b desc;
#(select sql_calc_found_rows a,b from t1 limit 2) union all (select a,b from t2 order by a) limit 2;
select found_rows();

7
sql/item.cc
View file

@ -535,9 +535,12 @@ bool Item_field::fix_fields(THD *thd, TABLE_LIST *tables, Item **ref)
SELECT_LEX *last= 0;
Item **refer= (Item **)not_found_item;
SELECT_LEX *cursel=(SELECT_LEX *) thd->lex.current_select;
// Prevent using outer fields in subselects, that is not supported now
if (thd->lex.current_select->linkage != DERIVED_TABLE_TYPE)
for (SELECT_LEX *sl= thd->lex.current_select->outer_select();
if (cursel->linkage != DERIVED_TABLE_TYPE)
for (SELECT_LEX *sl= (cursel->get_master()->linkage == GLOBAL_OPTIONS_TYPE &&
cursel->get_master()->order_list.elements) ? cursel->select_lex()
: cursel->outer_select();
sl;
sl= sl->outer_select())
{