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Commit 301b0786 authored by Davi Arnaut's avatar Davi Arnaut
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Bug#40277: SHOW CREATE VIEW returns invalid SQL 

The problem is that not all column names retrieved from a SELECT
statement can be used as view column names due to length and format
restrictions. The server failed to properly check the conformity
of those automatically generated column names before storing the
final view definition on disk.

Since columns retrieved from a SELECT statement can be anything
ranging from functions to constants values of any format and length,
the solution is to rewrite to a pre-defined format any names that
are not acceptable as a view column name.

The name is rewritten to "Name_exp_%u" where %u translates to the
position of the column. To avoid this conversion scheme, define
explict names for the view columns via the column_list clause.
Also, aliases are now only generated for top level statements.
parent 154fcda8
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Showing with 324 additions and 54 deletions
mysql-test/include/view_alias.inc 0 → 100644
View file @ 301b0786
# Routine to be called by t/view.inc
#
# The variable $after_select must be set before calling this routine.
eval CREATE VIEW v1 AS SELECT $after_select;
SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = 'test' AND TABLE_NAME = 'v1';
#
# Extract the VIEW's SELECT from INFORMATION_SCHEMA.VIEWS
let $query1 = `SELECT VIEW_DEFINITION FROM INFORMATION_SCHEMA.VIEWS WHERE TABLE_SCHEMA = 'test' AND TABLE_NAME = 'v1'`;
#
# Extract the VIEW's SELECT from SHOW CREATE VIEW
# SHOW CREATE VIEW v1
# View Create View character_set_client collation_connection
# v1 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select '<--- .....
let $value= query_get_value(SHOW CREATE VIEW v1, Create View, 1);
let $query2 = `SELECT SUBSTR("$value",INSTR("$value",' as select ') + CHAR_LENGTH(' as '))`;
DROP VIEW v1;
# Recreate the view based on SELECT from INFORMATION_SCHEMA.VIEWS
eval CREATE VIEW v1 AS $query1;
DROP VIEW v1;
# Recreate the view based on SHOW CREATE VIEW
eval CREATE VIEW v1 AS $query2;
DROP VIEW v1;
mysql-test/r/compare.result
View file @ 301b0786
......@@ -88,7 +88,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
Warnings:
Note 1276 Field or reference 'test.t2.a' of SELECT #2 was resolved in SELECT #1
Note 1276 Field or reference 'test.t2.a' of SELECT #2 was resolved in SELECT #1
Note 1003 select `test`.`t2`.`a` AS `a`,(select count(0) AS `COUNT(*)` from `test`.`t1` where ((`test`.`t1`.`b` = `test`.`t2`.`a`) and (concat(`test`.`t1`.`b`,`test`.`t1`.`c`) = concat('0',`test`.`t2`.`a`,'01')))) AS `x` from `test`.`t2` order by `test`.`t2`.`a`
Note 1003 select `test`.`t2`.`a` AS `a`,(select count(0) from `test`.`t1` where ((`test`.`t1`.`b` = `test`.`t2`.`a`) and (concat(`test`.`t1`.`b`,`test`.`t1`.`c`) = concat('0',`test`.`t2`.`a`,'01')))) AS `x` from `test`.`t2` order by `test`.`t2`.`a`
DROP TABLE t1,t2;
CREATE TABLE t1 (a TIMESTAMP);
INSERT INTO t1 VALUES (NOW()),(NOW()),(NOW());
......
mysql-test/r/explain.result
View file @ 301b0786
......@@ -224,6 +224,6 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1276 Field or reference 'test.t1.c' of SELECT #2 was resolved in SELECT #1
Note 1003 select (select 1 AS `1` from `test`.`t2` where (`test`.`t2`.`d` = NULL)) AS `(SELECT 1 FROM t2 WHERE d = c)` from `test`.`t1`
Note 1003 select (select 1 from `test`.`t2` where (`test`.`t2`.`d` = NULL)) AS `(SELECT 1 FROM t2 WHERE d = c)` from `test`.`t1`
DROP TABLE t1, t2;
End of 5.1 tests.
mysql-test/r/group_by.result
View file @ 301b0786
......@@ -1742,7 +1742,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1276 Field or reference 'test.t1.a' of SELECT #2 was resolved in SELECT #1
Note 1003 select (select `test`.`t1`.`a` AS `a`) AS `aa`,count(distinct `test`.`t1`.`b`) AS `COUNT(DISTINCT b)` from `test`.`t1` group by ((select `test`.`t1`.`a` AS `a`) + 0)
Note 1003 select (select `test`.`t1`.`a`) AS `aa`,count(distinct `test`.`t1`.`b`) AS `COUNT(DISTINCT b)` from `test`.`t1` group by ((select `test`.`t1`.`a`) + 0)
EXPLAIN EXTENDED
SELECT (SELECT t1.a) aa, COUNT(DISTINCT b) FROM t1 GROUP BY -aa;
id select_type table type possible_keys key key_len ref rows filtered Extra
......@@ -1750,7 +1750,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1276 Field or reference 'test.t1.a' of SELECT #2 was resolved in SELECT #1
Note 1003 select (select `test`.`t1`.`a` AS `a`) AS `aa`,count(distinct `test`.`t1`.`b`) AS `COUNT(DISTINCT b)` from `test`.`t1` group by -((select `test`.`t1`.`a` AS `a`))
Note 1003 select (select `test`.`t1`.`a`) AS `aa`,count(distinct `test`.`t1`.`b`) AS `COUNT(DISTINCT b)` from `test`.`t1` group by -((select `test`.`t1`.`a`))
# should return only one record
SELECT (SELECT tt.a FROM t1 tt LIMIT 1) aa, COUNT(DISTINCT b) FROM t1
GROUP BY aa;
......
mysql-test/r/ps.result
View file @ 301b0786
......@@ -1786,7 +1786,7 @@ prepare stmt from "create view v1 (c,d,e,f) as select a,b,a in (select a+2 from
execute stmt;
show create view v1;
View Create View character_set_client collation_connection
v1 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select `t1`.`a` AS `c`,`t1`.`b` AS `d`,`t1`.`a` in (select (`t1`.`a` + 2) AS `a+2` from `t1`) AS `e`,`t1`.`a` = all (select `t1`.`a` AS `a` from `t1`) AS `f` from `t1` latin1 latin1_swedish_ci
v1 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select `t1`.`a` AS `c`,`t1`.`b` AS `d`,`t1`.`a` in (select (`t1`.`a` + 2) from `t1`) AS `e`,`t1`.`a` = all (select `t1`.`a` from `t1`) AS `f` from `t1` latin1 latin1_swedish_ci
select * from v1;
c d e f
drop view v1;
......@@ -1794,7 +1794,7 @@ execute stmt;
deallocate prepare stmt;
show create view v1;
View Create View character_set_client collation_connection
v1 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select `t1`.`a` AS `c`,`t1`.`b` AS `d`,`t1`.`a` in (select (`t1`.`a` + 2) AS `a+2` from `t1`) AS `e`,`t1`.`a` = all (select `t1`.`a` AS `a` from `t1`) AS `f` from `t1` latin1 latin1_swedish_ci
v1 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select `t1`.`a` AS `c`,`t1`.`b` AS `d`,`t1`.`a` in (select (`t1`.`a` + 2) from `t1`) AS `e`,`t1`.`a` = all (select `t1`.`a` from `t1`) AS `f` from `t1` latin1 latin1_swedish_ci
select * from v1;
c d e f
drop view v1;
......
mysql-test/r/subselect.result
View file @ 301b0786
This diff is collapsed.
mysql-test/r/subselect3.result
View file @ 301b0786
......@@ -30,7 +30,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary; Using filesort
Warnings:
Note 1276 Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`oref` AS `oref`,<in_optimizer>(`test`.`t2`.`a`,<exists>(select max(`test`.`t1`.`ie`) AS `max(ie)` from `test`.`t1` where (`test`.`t1`.`oref` = `test`.`t2`.`oref`) group by `test`.`t1`.`grp` having trigcond((<cache>(`test`.`t2`.`a`) = <ref_null_helper>(max(`test`.`t1`.`ie`)))))) AS `Z` from `test`.`t2`
Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`oref` AS `oref`,<in_optimizer>(`test`.`t2`.`a`,<exists>(select max(`test`.`t1`.`ie`) from `test`.`t1` where (`test`.`t1`.`oref` = `test`.`t2`.`oref`) group by `test`.`t1`.`grp` having trigcond((<cache>(`test`.`t2`.`a`) = <ref_null_helper>(max(`test`.`t1`.`ie`)))))) AS `Z` from `test`.`t2`
explain extended
select a, oref from t2
where a in (select max(ie) from t1 where oref=t2.oref group by grp);
......@@ -39,7 +39,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary; Using filesort
Warnings:
Note 1276 Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`oref` AS `oref` from `test`.`t2` where <in_optimizer>(`test`.`t2`.`a`,<exists>(select max(`test`.`t1`.`ie`) AS `max(ie)` from `test`.`t1` where (`test`.`t1`.`oref` = `test`.`t2`.`oref`) group by `test`.`t1`.`grp` having (<cache>(`test`.`t2`.`a`) = <ref_null_helper>(max(`test`.`t1`.`ie`)))))
Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`oref` AS `oref` from `test`.`t2` where <in_optimizer>(`test`.`t2`.`a`,<exists>(select max(`test`.`t1`.`ie`) from `test`.`t1` where (`test`.`t1`.`oref` = `test`.`t2`.`oref`) group by `test`.`t1`.`grp` having (<cache>(`test`.`t2`.`a`) = <ref_null_helper>(max(`test`.`t1`.`ie`)))))
select a, oref, a in (
select max(ie) from t1 where oref=t2.oref group by grp union
select max(ie) from t1 where oref=t2.oref group by grp
......@@ -68,7 +68,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t3 ALL NULL NULL NULL NULL 2 100.00
2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary; Using filesort
Warnings:
Note 1003 select <in_optimizer>(`test`.`t3`.`a`,<exists>(select max(`test`.`t1`.`ie`) AS `max(ie)` from `test`.`t1` where (`test`.`t1`.`oref` = 4) group by `test`.`t1`.`grp` having trigcond((<cache>(`test`.`t3`.`a`) = <ref_null_helper>(max(`test`.`t1`.`ie`)))))) AS `a in (select max(ie) from t1 where oref=4 group by grp)` from `test`.`t3`
Note 1003 select <in_optimizer>(`test`.`t3`.`a`,<exists>(select max(`test`.`t1`.`ie`) from `test`.`t1` where (`test`.`t1`.`oref` = 4) group by `test`.`t1`.`grp` having trigcond((<cache>(`test`.`t3`.`a`) = <ref_null_helper>(max(`test`.`t1`.`ie`)))))) AS `a in (select max(ie) from t1 where oref=4 group by grp)` from `test`.`t3`
drop table t1, t2, t3;
create table t1 (a int, oref int, key(a));
insert into t1 values
......@@ -157,7 +157,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
2 DEPENDENT SUBQUERY t2 ref a a 5 test.t1.b 1 100.00 Using where
Warnings:
Note 1276 Field or reference 'test.t3.oref' of SELECT #2 was resolved in SELECT #1
Note 1003 select `test`.`t3`.`a` AS `a`,`test`.`t3`.`oref` AS `oref`,<in_optimizer>(`test`.`t3`.`a`,<exists>(select 1 AS `Not_used` from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`a` = `test`.`t1`.`b`) and (`test`.`t2`.`b` = `test`.`t3`.`oref`) and trigcond(((<cache>(`test`.`t3`.`a`) = `test`.`t1`.`a`) or isnull(`test`.`t1`.`a`)))) having trigcond(<is_not_null_test>(`test`.`t1`.`a`)))) AS `Z` from `test`.`t3`
Note 1003 select `test`.`t3`.`a` AS `a`,`test`.`t3`.`oref` AS `oref`,<in_optimizer>(`test`.`t3`.`a`,<exists>(select 1 from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`a` = `test`.`t1`.`b`) and (`test`.`t2`.`b` = `test`.`t3`.`oref`) and trigcond(((<cache>(`test`.`t3`.`a`) = `test`.`t1`.`a`) or isnull(`test`.`t1`.`a`)))) having trigcond(<is_not_null_test>(`test`.`t1`.`a`)))) AS `Z` from `test`.`t3`
drop table t1, t2, t3;
create table t1 (a int NOT NULL, b int NOT NULL, key(a));
insert into t1 values
......@@ -185,7 +185,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
2 DEPENDENT SUBQUERY t2 ref a a 4 test.t1.b 1 100.00 Using where
Warnings:
Note 1276 Field or reference 'test.t3.oref' of SELECT #2 was resolved in SELECT #1
Note 1003 select `test`.`t3`.`a` AS `a`,`test`.`t3`.`oref` AS `oref`,<in_optimizer>(`test`.`t3`.`a`,<exists>(select 1 AS `Not_used` from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`a` = `test`.`t1`.`b`) and (`test`.`t2`.`b` = `test`.`t3`.`oref`) and trigcond((<cache>(`test`.`t3`.`a`) = `test`.`t1`.`a`))))) AS `Z` from `test`.`t3`
Note 1003 select `test`.`t3`.`a` AS `a`,`test`.`t3`.`oref` AS `oref`,<in_optimizer>(`test`.`t3`.`a`,<exists>(select 1 from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`a` = `test`.`t1`.`b`) and (`test`.`t2`.`b` = `test`.`t3`.`oref`) and trigcond((<cache>(`test`.`t3`.`a`) = `test`.`t1`.`a`))))) AS `Z` from `test`.`t3`
drop table t1,t2,t3;
create table t1 (oref int, grp int);
insert into t1 (oref, grp) values
......@@ -209,7 +209,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort
Warnings:
Note 1276 Field or reference 't2.oref' of SELECT #2 was resolved in SELECT #1
Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`oref` AS `oref`,<in_optimizer>(`test`.`t2`.`a`,<exists>(select count(0) AS `count(*)` from `test`.`t1` group by `test`.`t1`.`grp` having ((`test`.`t1`.`grp` = `test`.`t2`.`oref`) and trigcond((<cache>(`test`.`t2`.`a`) = <ref_null_helper>(count(0))))))) AS `Z` from `test`.`t2`
Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`oref` AS `oref`,<in_optimizer>(`test`.`t2`.`a`,<exists>(select count(0) from `test`.`t1` group by `test`.`t1`.`grp` having ((`test`.`t1`.`grp` = `test`.`t2`.`oref`) and trigcond((<cache>(`test`.`t2`.`a`) = <ref_null_helper>(count(0))))))) AS `Z` from `test`.`t2`
drop table t1, t2;
create table t1 (a int, b int, primary key (a));
insert into t1 values (1,1), (3,1),(100,1);
......@@ -258,7 +258,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
2 DEPENDENT SUBQUERY t4 ALL NULL NULL NULL NULL 100 100.00 Using where; Using join buffer
Warnings:
Note 1276 Field or reference 'test.t2.oref' of SELECT #2 was resolved in SELECT #1
Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`oref` AS `oref`,<in_optimizer>((`test`.`t2`.`a`,`test`.`t2`.`b`),<exists>(select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` join `test`.`t4` where ((`test`.`t1`.`c` = `test`.`t2`.`oref`) and trigcond(((<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`) or isnull(`test`.`t1`.`a`))) and trigcond(((<cache>(`test`.`t2`.`b`) = `test`.`t1`.`b`) or isnull(`test`.`t1`.`b`)))) having (trigcond(<is_not_null_test>(`test`.`t1`.`a`)) and trigcond(<is_not_null_test>(`test`.`t1`.`b`))))) AS `Z` from `test`.`t2`
Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`oref` AS `oref`,<in_optimizer>((`test`.`t2`.`a`,`test`.`t2`.`b`),<exists>(select `test`.`t1`.`a`,`test`.`t1`.`b` from `test`.`t1` join `test`.`t4` where ((`test`.`t1`.`c` = `test`.`t2`.`oref`) and trigcond(((<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`) or isnull(`test`.`t1`.`a`))) and trigcond(((<cache>(`test`.`t2`.`b`) = `test`.`t1`.`b`) or isnull(`test`.`t1`.`b`)))) having (trigcond(<is_not_null_test>(`test`.`t1`.`a`)) and trigcond(<is_not_null_test>(`test`.`t1`.`b`))))) AS `Z` from `test`.`t2`
select a,b, oref,
(a,b) in (select a,b from t1,t4 where c=t2.oref) Z
from t2;
......@@ -703,7 +703,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 Using index
2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`b` = `test`.`t1`.`a`) and (not(<in_optimizer>(`test`.`t1`.`a`,<exists>(select 1 AS `Not_used` from `test`.`t1` where ((<cache>(`test`.`t2`.`b`) = `test`.`t1`.`a`) or isnull(`test`.`t1`.`a`)) having <is_not_null_test>(`test`.`t1`.`a`))))))
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`b` = `test`.`t1`.`a`) and (not(<in_optimizer>(`test`.`t1`.`a`,<exists>(select 1 from `test`.`t1` where ((<cache>(`test`.`t2`.`b`) = `test`.`t1`.`a`) or isnull(`test`.`t1`.`a`)) having <is_not_null_test>(`test`.`t1`.`a`))))))
SELECT a FROM t1, t2 WHERE a=b AND (b NOT IN (SELECT a FROM t1));
a
SELECT a FROM t1, t2 WHERE a=b AND (b NOT IN (SELECT a FROM t1 WHERE a > 4));
......@@ -864,7 +864,7 @@ Level Code Message
Note 1276 Field or reference 'test.t1.a' of SELECT #3 was resolved in SELECT #2
Note 1276 Field or reference 'test.t1.c' of SELECT #3 was resolved in SELECT #2
Error 1054 Unknown column 'c' in 'field list'
Note 1003 select `c` AS `c` from (select (select count(`test`.`t1`.`a`) AS `COUNT(a)` from (select count(`test`.`t1`.`b`) AS `COUNT(b)` from `test`.`t1`) `x` group by `c`) AS `(SELECT COUNT(a) FROM
Note 1003 select `c` AS `c` from (select (select count(`test`.`t1`.`a`) from (select count(`test`.`t1`.`b`) AS `COUNT(b)` from `test`.`t1`) `x` group by `c`) AS `(SELECT COUNT(a) FROM
(SELECT COUNT(b) FROM t1) AS x GROUP BY c
)` from `test`.`t1` group by `test`.`t1`.`b`) `y`
DROP TABLE t1;
......
mysql-test/r/type_datetime.result
View file @ 301b0786
......@@ -517,7 +517,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
Warnings:
Note 1276 Field or reference 'test.t1.cur_date' of SELECT #2 was resolved in SELECT #1
Note 1003 select '1' AS `id`,'2007-04-25 18:30:22' AS `cur_date` from `test`.`t1` where <in_optimizer>('1',<exists>(select 1 AS `Not_used` from `test`.`t1` `x1` where 0))
Note 1003 select '1' AS `id`,'2007-04-25 18:30:22' AS `cur_date` from `test`.`t1` where <in_optimizer>('1',<exists>(select 1 from `test`.`t1` `x1` where 0))
select * from t1
where id in (select id from t1 as x1 where (t1.cur_date is null));
id cur_date
......@@ -529,7 +529,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
Warnings:
Note 1276 Field or reference 'test.t2.cur_date' of SELECT #2 was resolved in SELECT #1
Note 1003 select '1' AS `id`,'2007-04-25' AS `cur_date` from `test`.`t2` where <in_optimizer>('1',<exists>(select 1 AS `Not_used` from `test`.`t2` `x1` where 0))
Note 1003 select '1' AS `id`,'2007-04-25' AS `cur_date` from `test`.`t2` where <in_optimizer>('1',<exists>(select 1 from `test`.`t2` `x1` where 0))
select * from t2
where id in (select id from t2 as x1 where (t2.cur_date is null));
id cur_date
......@@ -543,7 +543,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
2 DEPENDENT SUBQUERY x1 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1276 Field or reference 'test.t1.cur_date' of SELECT #2 was resolved in SELECT #1
Note 1003 select `test`.`t1`.`id` AS `id`,`test`.`t1`.`cur_date` AS `cur_date` from `test`.`t1` where <in_optimizer>(`test`.`t1`.`id`,<exists>(select 1 AS `Not_used` from `test`.`t1` `x1` where ((`test`.`t1`.`cur_date` = 0) and (<cache>(`test`.`t1`.`id`) = `test`.`x1`.`id`))))
Note 1003 select `test`.`t1`.`id` AS `id`,`test`.`t1`.`cur_date` AS `cur_date` from `test`.`t1` where <in_optimizer>(`test`.`t1`.`id`,<exists>(select 1 from `test`.`t1` `x1` where ((`test`.`t1`.`cur_date` = 0) and (<cache>(`test`.`t1`.`id`) = `test`.`x1`.`id`))))
select * from t1
where id in (select id from t1 as x1 where (t1.cur_date is null));
id cur_date
......@@ -555,7 +555,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
2 DEPENDENT SUBQUERY x1 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1276 Field or reference 'test.t2.cur_date' of SELECT #2 was resolved in SELECT #1
Note 1003 select `test`.`t2`.`id` AS `id`,`test`.`t2`.`cur_date` AS `cur_date` from `test`.`t2` where <in_optimizer>(`test`.`t2`.`id`,<exists>(select 1 AS `Not_used` from `test`.`t2` `x1` where ((`test`.`t2`.`cur_date` = 0) and (<cache>(`test`.`t2`.`id`) = `test`.`x1`.`id`))))
Note 1003 select `test`.`t2`.`id` AS `id`,`test`.`t2`.`cur_date` AS `cur_date` from `test`.`t2` where <in_optimizer>(`test`.`t2`.`id`,<exists>(select 1 from `test`.`t2` `x1` where ((`test`.`t2`.`cur_date` = 0) and (<cache>(`test`.`t2`.`id`) = `test`.`x1`.`id`))))
select * from t2
where id in (select id from t2 as x1 where (t2.cur_date is null));
id cur_date
......
mysql-test/r/union.result
View file @ 301b0786
......@@ -1636,7 +1636,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL NULL Using filesort
Warnings:
Note 1276 Field or reference 'test.t1.a' of SELECT #3 was resolved in SELECT #2
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` union select `test`.`t1`.`a` AS `a` from `test`.`t1` order by (select `test`.`t1`.`a` AS `a` from `test`.`t2` where (`test`.`t2`.`b` = 12))
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` union select `test`.`t1`.`a` AS `a` from `test`.`t1` order by (select `test`.`t1`.`a` from `test`.`t2` where (`test`.`t2`.`b` = 12))
# Should not crash
SELECT * FROM t1 UNION SELECT * FROM t1
ORDER BY (SELECT a FROM t2 WHERE b = 12);
......
mysql-test/r/view.result
View file @ 301b0786
......@@ -717,7 +717,7 @@ create view v1 as select a from t1;
create view v2 as select a from t2 where a in (select a from v1);
show create view v2;
View Create View character_set_client collation_connection
v2 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v2` AS select `t2`.`a` AS `a` from `t2` where `t2`.`a` in (select `v1`.`a` AS `a` from `v1`) latin1 latin1_swedish_ci
v2 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v2` AS select `t2`.`a` AS `a` from `t2` where `t2`.`a` in (select `v1`.`a` from `v1`) latin1 latin1_swedish_ci
drop view v2, v1;
drop table t1, t2;
CREATE VIEW `v 1` AS select 5 AS `5`;
......@@ -2982,7 +2982,7 @@ SHOW WARNINGS;
Level Code Message
SHOW CREATE VIEW v1;
View Create View character_set_client collation_connection
v1 CREATE ALGORITHM=MERGE DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select `t1`.`pk` AS `pk` from (`t1` join `t2` on(((`t2`.`fk` = `t1`.`pk`) and (`t2`.`ver` = (select max(`t`.`ver`) AS `MAX(t.ver)` from `t2` `t` where (`t`.`org` = `t2`.`org`)))))) latin1 latin1_swedish_ci
v1 CREATE ALGORITHM=MERGE DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select `t1`.`pk` AS `pk` from (`t1` join `t2` on(((`t2`.`fk` = `t1`.`pk`) and (`t2`.`ver` = (select max(`t`.`ver`) from `t2` `t` where (`t`.`org` = `t2`.`org`)))))) latin1 latin1_swedish_ci
DROP VIEW v1;
DROP TABLE t1, t2;
DROP FUNCTION IF EXISTS f1;
......
mysql-test/r/view_alias.result 0 → 100644
View file @ 301b0786
#
# Bug#40277 SHOW CREATE VIEW returns invalid SQL
# Bug#41999 SHOW CREATE VIEW returns invalid SQL if subquery is used in SELECT list
#
# 65 characters exceed the maximum length of a column identifier. The system cannot derive the name from statement.
# Constant with length = 65 . Expect to get the identifier 'Name_exp_1'.
CREATE VIEW v1 AS SELECT '<--- 65 char including the arrows --->';
SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = 'test' AND TABLE_NAME = 'v1';
COLUMN_NAME
Name_exp_1
DROP VIEW v1;
CREATE VIEW v1 AS select '<--- 65 char including the arrows --->' AS `Name_exp_1`;
DROP VIEW v1;
CREATE VIEW v1 AS select '<--- 65 char including the arrows --->' AS `Name_exp_1`;
DROP VIEW v1;
# Subquery with length = 65 . Expect to get the identifier 'Name_exp_1'.
# Attention: Identifier for the column within the subquery will be not generated.
CREATE VIEW v1 AS SELECT (SELECT '<--- 54 char including the arrows (+ 11 outside) -->');
SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = 'test' AND TABLE_NAME = 'v1';
COLUMN_NAME
Name_exp_1
DROP VIEW v1;
CREATE VIEW v1 AS select (select '<--- 54 char including the arrows (+ 11 outside) -->') AS `Name_exp_1`;
DROP VIEW v1;
CREATE VIEW v1 AS select (select '<--- 54 char including the arrows (+ 11 outside) -->') AS `Name_exp_1`;
DROP VIEW v1;
# -----------------------------------------------------------------------------------------------------------------
# 64 characters are the maximum length of a column identifier. The system can derive the name from the statement.
CREATE VIEW v1 AS SELECT '<--- 64 char including the arrows --->';
SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = 'test' AND TABLE_NAME = 'v1';
COLUMN_NAME
<--- 64 char including the arrows --->
DROP VIEW v1;
CREATE VIEW v1 AS select '<--- 64 char including the arrows --->' AS `<--- 64 char including the arrows --->`;
DROP VIEW v1;
CREATE VIEW v1 AS select '<--- 64 char including the arrows --->' AS `<--- 64 char including the arrows --->`;
DROP VIEW v1;
CREATE VIEW v1 AS SELECT (SELECT '<--- 53 char including the arrows (+ 11 outside) --->');
SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = 'test' AND TABLE_NAME = 'v1';
COLUMN_NAME
(SELECT '<--- 53 char including the arrows (+ 11 outside) --->')
DROP VIEW v1;
CREATE VIEW v1 AS select (select '<--- 53 char including the arrows (+ 11 outside) --->') AS `(SELECT '<--- 53 char including the arrows (+ 11 outside) --->')`;
DROP VIEW v1;
CREATE VIEW v1 AS select (select '<--- 53 char including the arrows (+ 11 outside) --->') AS `(SELECT '<--- 53 char including the arrows (+ 11 outside) --->')`;
DROP VIEW v1;
# -----------------------------------------------------------------------------------------------------------------
# Identifiers must not have trailing spaces. The system cannot derive the name from a constant with trailing space.
# Generated identifiers have at their end the position within the select column list.
# 'c2 ' -> 'Name_exp_1' , ' c4 ' -> 'Name_exp_2'
CREATE VIEW v1 AS SELECT 'c1', 'c2 ', ' c3', ' c4 ';
SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = 'test' AND TABLE_NAME = 'v1';
COLUMN_NAME
c1
Name_exp_2
c3
Name_exp_4
DROP VIEW v1;
CREATE VIEW v1 AS select 'c1' AS `c1`,'c2 ' AS `Name_exp_2`,' c3' AS `c3`,' c4 ' AS `Name_exp_4`;
DROP VIEW v1;
CREATE VIEW v1 AS select 'c1' AS `c1`,'c2 ' AS `Name_exp_2`,' c3' AS `c3`,' c4 ' AS `Name_exp_4`;
DROP VIEW v1;
#
# Bug#40277 SHOW CREATE VIEW returns invalid SQL
#
DROP VIEW IF EXISTS v1;
DROP TABLE IF EXISTS t1,t2;
# Column name exceeds the maximum length.
CREATE VIEW v1 AS SELECT '0000000000 1111111111 2222222222 3333333333 4444444444 5555555555';
DROP VIEW v1;
CREATE VIEW v1 AS select '0000000000 1111111111 2222222222 3333333333 4444444444 5555555555' AS `Name_exp_1`;
DROP VIEW v1;
# Column names with leading trailing spaces.
CREATE VIEW v1 AS SELECT 'c1', 'c2 ', ' c3', ' c4 ';
DROP VIEW v1;
CREATE VIEW v1 AS select 'c1' AS `c1`,'c2 ' AS `Name_exp_2`,' c3' AS `c3`,' c4 ' AS `Name_exp_4`;
DROP VIEW v1;
# Column name conflicts with a auto-generated one.
CREATE VIEW v1 AS SELECT 'c1', 'c2 ', ' c3', ' c4 ', 'Name_exp_2';
DROP VIEW v1;
CREATE VIEW v1 AS select 'c1' AS `c1`,'c2 ' AS `Name_exp_2`,' c3' AS `c3`,' c4 ' AS `Name_exp_4`,'Name_exp_2' AS `My_exp_Name_exp_2`;
DROP VIEW v1;
# Invalid conlumn name in subquery.
CREATE VIEW v1 AS SELECT (SELECT ' c1 ');
DROP VIEW v1;
CREATE VIEW v1 AS select (select ' c1 ') AS `(SELECT ' c1 ')`;
DROP VIEW v1;
CREATE TABLE t1(a INT);
CREATE TABLE t2 LIKE t1;
# Test alias in subquery
CREATE VIEW v1 AS SELECT a FROM t1 WHERE EXISTS (SELECT 1 FROM t2 AS b WHERE b.a = 0);
DROP VIEW v1;
CREATE VIEW v1 AS select `test`.`t1`.`a` AS `a` from `test`.`t1` where exists(select 1 from `test`.`t2` `b` where (`b`.`a` = 0));
DROP VIEW v1;
# Test column alias in subquery
CREATE VIEW v1 AS SELECT a FROM t1 WHERE EXISTS (SELECT a AS alias FROM t1 GROUP BY alias);
SHOW CREATE VIEW v1;
View Create View character_set_client collation_connection
v1 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select `t1`.`a` AS `a` from `t1` where exists(select `t1`.`a` AS `alias` from `t1` group by `t1`.`a`) latin1 latin1_swedish_ci
DROP VIEW v1;
CREATE VIEW v1 AS select `test`.`t1`.`a` AS `a` from `test`.`t1` where exists(select `test`.`t1`.`a` AS `alias` from `test`.`t1` group by `test`.`t1`.`a`);
DROP VIEW v1;
# Alias as the expression column name.
CREATE VIEW v1 AS SELECT a FROM t1 WHERE EXISTS (SELECT ' a ' AS alias FROM t1 GROUP BY alias);
SHOW CREATE VIEW v1;
View Create View character_set_client collation_connection
v1 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select `t1`.`a` AS `a` from `t1` where exists(select ' a ' AS `alias` from `t1` group by ' a ') latin1 latin1_swedish_ci
DROP VIEW v1;
CREATE VIEW v1 AS select `test`.`t1`.`a` AS `a` from `test`.`t1` where exists(select ' a ' AS `alias` from `test`.`t1` group by ' a ');
DROP VIEW v1;
DROP TABLE t1, t2;
mysql-test/t/view_alias.test 0 → 100644
View file @ 301b0786
--echo #
--echo # Bug#40277 SHOW CREATE VIEW returns invalid SQL
--echo # Bug#41999 SHOW CREATE VIEW returns invalid SQL if subquery is used in SELECT list
--echo #
--echo # 65 characters exceed the maximum length of a column identifier. The system cannot derive the name from statement.
--echo # Constant with length = 65 . Expect to get the identifier 'Name_exp_1'.
let $after_select= '<--- 65 char including the arrows --->';
--source include/view_alias.inc
--echo # Subquery with length = 65 . Expect to get the identifier 'Name_exp_1'.
--echo # Attention: Identifier for the column within the subquery will be not generated.
let $after_select= (SELECT '<--- 54 char including the arrows (+ 11 outside) -->');
--source include/view_alias.inc
--echo # -----------------------------------------------------------------------------------------------------------------
#
--echo # 64 characters are the maximum length of a column identifier. The system can derive the name from the statement.
let $after_select= '<--- 64 char including the arrows --->';
--source include/view_alias.inc
let $after_select= (SELECT '<--- 53 char including the arrows (+ 11 outside) --->');
--source include/view_alias.inc
--echo # -----------------------------------------------------------------------------------------------------------------
#
--echo # Identifiers must not have trailing spaces. The system cannot derive the name from a constant with trailing space.
--echo # Generated identifiers have at their end the position within the select column list.
--echo # 'c2 ' -> 'Name_exp_1' , ' c4 ' -> 'Name_exp_2'
let $after_select= 'c1', 'c2 ', ' c3', ' c4 ';
--source include/view_alias.inc
--echo #
--echo # Bug#40277 SHOW CREATE VIEW returns invalid SQL
--echo #
--disable_warnings
DROP VIEW IF EXISTS v1;
DROP TABLE IF EXISTS t1,t2;
--enable_warnings
--echo # Column name exceeds the maximum length.
CREATE VIEW v1 AS SELECT '0000000000 1111111111 2222222222 3333333333 4444444444 5555555555';
let $query = `SELECT VIEW_DEFINITION FROM INFORMATION_SCHEMA.VIEWS WHERE TABLE_SCHEMA = 'test' AND TABLE_NAME = 'v1'`;
DROP VIEW v1;
eval CREATE VIEW v1 AS $query;
DROP VIEW v1;
--echo # Column names with leading trailing spaces.
CREATE VIEW v1 AS SELECT 'c1', 'c2 ', ' c3', ' c4 ';
let $query = `SELECT VIEW_DEFINITION FROM INFORMATION_SCHEMA.VIEWS WHERE TABLE_SCHEMA = 'test' AND TABLE_NAME = 'v1'`;
DROP VIEW v1;
eval CREATE VIEW v1 AS $query;
DROP VIEW v1;
--echo # Column name conflicts with a auto-generated one.
CREATE VIEW v1 AS SELECT 'c1', 'c2 ', ' c3', ' c4 ', 'Name_exp_2';
let $query = `SELECT VIEW_DEFINITION FROM INFORMATION_SCHEMA.VIEWS WHERE TABLE_SCHEMA = 'test' AND TABLE_NAME = 'v1'`;
DROP VIEW v1;
eval CREATE VIEW v1 AS $query;
DROP VIEW v1;
--echo # Invalid conlumn name in subquery.
CREATE VIEW v1 AS SELECT (SELECT ' c1 ');
let $query = `SELECT VIEW_DEFINITION FROM INFORMATION_SCHEMA.VIEWS WHERE TABLE_SCHEMA = 'test' AND TABLE_NAME = 'v1'`;
DROP VIEW v1;
eval CREATE VIEW v1 AS $query;
DROP VIEW v1;
CREATE TABLE t1(a INT);
CREATE TABLE t2 LIKE t1;
--echo # Test alias in subquery
CREATE VIEW v1 AS SELECT a FROM t1 WHERE EXISTS (SELECT 1 FROM t2 AS b WHERE b.a = 0);
let $query = `SELECT VIEW_DEFINITION FROM INFORMATION_SCHEMA.VIEWS WHERE TABLE_SCHEMA = 'test' AND TABLE_NAME = 'v1'`;
DROP VIEW v1;
eval CREATE VIEW v1 AS $query;
DROP VIEW v1;
--echo # Test column alias in subquery
CREATE VIEW v1 AS SELECT a FROM t1 WHERE EXISTS (SELECT a AS alias FROM t1 GROUP BY alias);
SHOW CREATE VIEW v1;
let $query = `SELECT VIEW_DEFINITION FROM INFORMATION_SCHEMA.VIEWS WHERE TABLE_SCHEMA = 'test' AND TABLE_NAME = 'v1'`;
DROP VIEW v1;
eval CREATE VIEW v1 AS $query;
DROP VIEW v1;
--echo # Alias as the expression column name.
CREATE VIEW v1 AS SELECT a FROM t1 WHERE EXISTS (SELECT ' a ' AS alias FROM t1 GROUP BY alias);
SHOW CREATE VIEW v1;
let $query = `SELECT VIEW_DEFINITION FROM INFORMATION_SCHEMA.VIEWS WHERE TABLE_SCHEMA = 'test' AND TABLE_NAME = 'v1'`;
DROP VIEW v1;
eval CREATE VIEW v1 AS $query;
DROP VIEW v1;
DROP TABLE t1, t2;
sql/sql_select.cc
View file @ 301b0786
......@@ -16950,7 +16950,17 @@ void st_select_lex::print(THD *thd, String *str, enum_query_type query_type)
first= 0;
else
str->append(',');
item->print_item_w_name(str, query_type);
if (master_unit()->item && item->is_autogenerated_name)
{
/*
Do not print auto-generated aliases in subqueries. It has no purpose
in a view definition or other contexts where the query is printed.
*/
item->print(str, query_type);
}
else
item->print_item_w_name(str, query_type);
}
/*
......
sql/sql_view.cc
View file @ 301b0786
......@@ -155,6 +155,35 @@ err:
DBUG_RETURN(TRUE);
}
/**
Check if auto generated column names are conforming and
possibly generate a conforming name for them if not.
@param item_list List of Items which should be checked
*/
static void make_valid_column_names(List<Item> &item_list)
{
Item *item;
uint name_len;
List_iterator_fast<Item> it(item_list);
char buff[NAME_LEN];
DBUG_ENTER("make_valid_column_names");
for (uint column_no= 1; (item= it++); column_no++)
{
if (!item->is_autogenerated_name || !check_column_name(item->name))
continue;
name_len= my_snprintf(buff, NAME_LEN, "Name_exp_%u", column_no);
item->orig_name= item->name;
item->set_name(buff, name_len, system_charset_info);
}
DBUG_VOID_RETURN;
}
/*
Fill defined view parts
......@@ -548,6 +577,9 @@ bool mysql_create_view(THD *thd, TABLE_LIST *views,
}
}
/* Check if the auto generated column names are conforming. */
make_valid_column_names(select_lex->item_list);
if (check_duplicate_names(select_lex->item_list, 1))
{
res= TRUE;
......
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