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fixed derived table visibility scope for derived tables with union

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This commit is contained in:
bell@sanja.is.com.ua
2002-12-17 23:18:19 +02:00
parent e56fb1962f
commit 9e2d9aa274
3 changed files with 16 additions and 4 deletions
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4
mysql-test/r/derived.result
View File

@@ -1,3 +1,7 @@
SELECT 1 as a FROM (SELECT 1 UNION SELECT a) b;
Unknown column 'a' in 'field list'
SELECT 1 as a FROM (SELECT a UNION SELECT 1) b;
Unknown column 'a' in 'field list'
drop table if exists t1,t2,t3;
CREATE TABLE t1 (a int not null, b char (10) not null);
insert into t1 values(1,'a'),(2,'b'),(3,'c'),(3,'c');

4
mysql-test/t/derived.test
View File

@@ -1,3 +1,7 @@
-- error 1054
SELECT 1 as a FROM (SELECT 1 UNION SELECT a) b;
-- error 1054
SELECT 1 as a FROM (SELECT a UNION SELECT 1) b;
drop table if exists t1,t2,t3;
CREATE TABLE t1 (a int not null, b char (10) not null);
insert into t1 values(1,'a'),(2,'b'),(3,'c'),(3,'c');

12
sql/item.cc
View File

@@ -573,7 +573,8 @@ bool Item_field::fix_fields(THD *thd, TABLE_LIST *tables, Item **ref)
Item **refer= (Item **)not_found_item;
// Prevent using outer fields in subselects, that is not supported now
SELECT_LEX *cursel=(SELECT_LEX *) thd->lex.current_select;
if (cursel->linkage != DERIVED_TABLE_TYPE)
if (cursel->master_unit()->first_select()->linkage !=
DERIVED_TABLE_TYPE)
for (SELECT_LEX *sl=cursel->outer_select();
sl;
sl= sl->outer_select())
@@ -586,7 +587,8 @@ bool Item_field::fix_fields(THD *thd, TABLE_LIST *tables, Item **ref)
REPORT_EXCEPT_NOT_FOUND)) !=
(Item **)not_found_item)
break;
if (sl->linkage == DERIVED_TABLE_TYPE)
if (sl->master_unit()->first_select()->linkage ==
DERIVED_TABLE_TYPE)
break; // do not look over derived table
}
if (!tmp)
@@ -1024,7 +1026,8 @@ bool Item_ref::fix_fields(THD *thd,TABLE_LIST *tables, Item **reference)
if ((ref= find_item_in_list(this,
*(thd->lex.current_select->get_item_list()),
((sl &&
thd->lex.current_select->linkage !=
thd->lex.current_select->master_unit()->
first_select()->linkage !=
DERIVED_TABLE_TYPE) ?
REPORT_EXCEPT_NOT_FOUND :
REPORT_ALL_ERRORS))) ==
@@ -1050,7 +1053,8 @@ bool Item_ref::fix_fields(THD *thd,TABLE_LIST *tables, Item **reference)
if ((tmp= find_field_in_tables(thd, this,
sl->get_table_list(),
0)) != not_found_field);
if (sl->linkage == DERIVED_TABLE_TYPE)
if (sl->master_unit()->first_select()->linkage ==
DERIVED_TABLE_TYPE)
break; // do not look over derived table
}