fixed merged view fields names (BUG#5147)

support of merged VIEW over several tables added (WL#1809)


mysql-test/r/view.result:
  merge of VIEW with several tables
mysql-test/t/view.test:
  merge of VIEW with several tables
sql/item.cc:
  renaming Item and restoring item name on cleunup()
sql/item.h:
  renaming Item and restoring item name on cleunup()
  debug output added
sql/item_cmpfunc.h:
  setup_conds() changed to support two tables lists
sql/item_subselect.cc:
  list of table leaves used instead of local table list for name resolving
sql/mysql_priv.h:
  setup_conds() and setup_tables() changed to support two tables lists
sql/opt_sum.cc:
  list of table leaves used instead of local table list for name resolving
sql/sp.cc:
  setup_tables() changed to support two tables lists
sql/sql_base.cc:
  skip temporary tables in table finding
  fixed merged view fields names (BUG#5147)
sql/sql_delete.cc:
  setup_conds() and setup_tables() changed to support two tables lists
sql/sql_help.cc:
  setup_tables() changed to support two tables lists
sql/sql_insert.cc:
  setup_tables() changed to support two tables lists
  name handling support
sql/sql_lex.cc:
  allow view with several tables for MERGE
sql/sql_lex.h:
  new table list
sql/sql_load.cc:
  setup_tables() changed to support two tables lists
sql/sql_olap.cc:
  setup_tables() changed to support two tables lists
sql/sql_parse.cc:
  new list support
sql/sql_prepare.cc:
  new list support
sql/sql_select.cc:
  list of table leaves used instead of local table list for name resolving
sql/sql_update.cc:
  setup_conds() and setup_tables() changed to support two tables lists
sql/sql_view.cc:
  support of MERGED VIEWS with several tables
sql/sql_yacc.yy:
  removed blanks in new code
sql/table.cc:
  fixed setup view code
  support of merged VIEW over several tables added
sql/table.h:
  fixed merged view fields names (BUG#5147)

1 files changed, 50 insertions, 2 deletions

diff --git a/mysql-test/r/view.result b/mysql-test/r/view.result
index 2551977200e..c1462bf8c74 100644
--- a/mysql-test/r/view.result
+++ b/mysql-test/r/view.result
@@ -877,7 +877,7 @@ insert into t1 values (1), (2), (3), (200);
 create view v1 (x) as select a from t1 where a > 1;
 create view v2 (y) as select x from v1 where x < 100;
 select * from v2;
-x
+y
 2
 3
 drop table t1;
@@ -1310,4 +1310,52 @@ a	a	a
 3	2	3
 3	3	3
 drop view v1;
-drop table t1;
+drop table t1,t2;
+create table t1 (a int);
+create table t2 (a int);
+create table t3 (a int);
+insert into t1 values (1), (2), (3);
+insert into t2 values (1), (3);
+insert into t3 values (1), (2), (4);
+create view v3 (a,b) as select t1.a as a, t2.a as b from t1 left join t2 on (t1.a=t2.a);
+select * from t3 left join v3 on (t3.a = v3.a);
+a	a	b
+1	1	1
+2	2	NULL
+4	NULL	NULL
+explain extended select * from t3 left join v3 on (t3.a = v3.a);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	
+1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	
+Warnings:
+Note	1003	select `test`.`t3`.`a` AS `a`,`test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `b` from `test`.`t3` left join (`test`.`t1` left join `test`.`t2` on((`test`.`t1`.`a` = `test`.`t2`.`a`))) on((`test`.`t3`.`a` = `test`.`t1`.`a`)) where 1
+create view v1 (a) as select a from t1;
+create view v2 (a) as select a from t2;
+create view v4 (a,b) as select v1.a as a, v2.a as b from v1 left join v2 on (v1.a=v2.a);
+select * from t3 left join v4 on (t3.a = v4.a);
+a	a	b
+1	1	1
+2	2	NULL
+4	NULL	NULL
+explain extended select * from t3 left join v4 on (t3.a = v4.a);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	3	
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	3	
+1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	
+Warnings:
+Note	1003	select `test`.`t3`.`a` AS `a`,`test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `b` from `test`.`t3` left join (`test`.`v1` left join `test`.`v2` on((`test`.`t1`.`a` = `test`.`t2`.`a`))) on((`test`.`t3`.`a` = `test`.`t1`.`a`)) where 1
+prepare stmt1 from "select * from t3 left join v4 on (t3.a = v4.a);";
+execute stmt1;
+a	a	b
+1	1	1
+2	2	NULL
+4	NULL	NULL
+execute stmt1;
+a	a	b
+1	1	1
+2	2	NULL
+4	NULL	NULL
+deallocate prepare stmt1;
+drop view v4,v3,v2,v1;
+drop tables t1,t2,t3;