for now, remove FOR SYSTEM_TIME at the end of the query

non-standard, redundant, potentially risky in the future,
hides bugs. See #383, #384, #385

Fixed a parser bug where
SELECT * FROM (t1 join t2) FOR SYSTEM_TIME ...
was not an error.

mysql-test/suite/versioning/r/cte.result

@@ -102,13 +102,13 @@ emp_id	name	mgr	address
 2	bill	1	New York
 3	kate	1	London
 4	john	1	Paris
-with ancestors as (select * from emp natural join addr where 1 for system_time all) select * from ancestors;
+with ancestors as (select * from (select * from emp natural join addr) for system_time all as t) select * from ancestors;
 emp_id	name	mgr	address
 1	bill	0	Moscow
 2	bill	1	New York
 3	kate	1	London
 4	john	1	Paris
-select * from emp natural join addr where 1 for system_time all;
+select * from (select * from emp natural join addr) for system_time all as t;
 emp_id	name	mgr	address
 1	bill	0	Moscow
 2	bill	1	New York

mysql-test/suite/versioning/r/derived.result

@@ -91,34 +91,29 @@ ancestors
 as
 (
 select e.emp_id, e.name, e.mgr
-from emp as e
+from emp for system_time as of timestamp @ts as e
 where name = 'bill'
-  for system_time as of timestamp @ts
+  union
-union
 select ee.emp_id, ee.name, ee.mgr
-from emp as ee, ancestors as a
+from emp for system_time as of timestamp @ts as ee, ancestors as a
 where ee.mgr = a.emp_id
-for system_time as of timestamp @ts
 )
 select * from ancestors;
 emp_id	name	mgr
 1	bill	0
 2	bill	1
-3	kate	1
 set @tmp= "
 with recursive
 ancestors
 as
 (
   select e.emp_id, e.name, e.mgr
-  from emp as e
+  from emp for system_time as of timestamp @ts as e
   where name = 'bill'
-  for system_time as of timestamp @ts
   union
   select ee.emp_id, ee.name, ee.mgr
-  from emp as ee, ancestors as a
+  from emp for system_time as of timestamp @ts as ee, ancestors as a
   where ee.mgr = a.emp_id
-  for system_time as of timestamp @ts
 )
 select * from ancestors";
 prepare stmt from @tmp;
@@ -126,7 +121,6 @@ execute stmt;
 emp_id	name	mgr
 1	bill	0
 2	bill	1
-3	kate	1
 drop prepare stmt;
 drop table emp;
 create or replace table t1 (x int) with system versioning;
@@ -155,7 +149,7 @@ with s3 as (select *, t1.sys_trx_end from t2, t1 for system_time as of timestamp
 y	x
 10	1
 # SYSTEM_TIME propagation from outer to inner
-select * from (select *, t1.sys_trx_start from t2 for system_time as of current_timestamp, t1) as s4 for system_time as of timestamp @t0;
+select * from (select *, t1.sys_trx_start from t2 for system_time as of current_timestamp, t1) for system_time as of timestamp @t0 as s4;
 y	x
 10	1
 with s5 as (select *, t1.sys_trx_start from t2 for system_time as of current_timestamp, t1) select * from s5 for system_time as of timestamp @t0;
@@ -183,7 +177,7 @@ select * from (select *, vt1.sys_trx_end from t2, vt1) as s0;
 y	x
 10	1
 ### SYSTEM_TIME clash
-select * from (select * from t1 for system_time all) dt0 for system_time all;
+select * from (select * from t1 for system_time all) for system_time all as dt0;
 ERROR HY000: SYSTEM_TIME is not allowed outside historical `dt0`
 select * from vt1 for system_time all;
 ERROR HY000: SYSTEM_TIME is not allowed outside historical `vt1`

mysql-test/suite/versioning/r/optimized.result

@@ -25,7 +25,7 @@ a	b
 3	NULL
 Warnings:
 Warning	4112	Attempt to read unversioned field `b` in historical query
-select count(*) from t group by b for system_time as of timestamp now(6);
+select count(*) from t for system_time as of timestamp now(6) group by b;
 count(*)
 2
 Warnings:
@@ -44,41 +44,10 @@ a	b
 Warnings:
 Warning	4112	Attempt to read unversioned field `b` in historical query
 Warning	4112	Attempt to read unversioned field `b` in historical query
-select * from t group by a having a=2 for system_time as of timestamp now(6);
+select * from t for system_time as of timestamp now(6) group by a having a=2;
 a	b
 Warnings:
 Warning	4112	Attempt to read unversioned field `b` in historical query
-select * from t group by b having b=2 for system_time as of timestamp now(6);
-a	b
-Warnings:
-Warning	4112	Attempt to read unversioned field `b` in historical query
-select a from t where b=2 for system_time as of timestamp now(6);
-a
-Warnings:
-Warning	4112	Attempt to read unversioned field `b` in historical query
-select a from t where b=NULL for system_time as of timestamp now(6);
-a
-Warnings:
-Warning	4112	Attempt to read unversioned field `b` in historical query
-select a from t where b is NULL for system_time as of timestamp now(6);
-a
-1
-3
-Warnings:
-Warning	4112	Attempt to read unversioned field `b` in historical query
-select count(*), b from t group by b having b=NULL for system_time as of timestamp now(6);
-count(*)	b
-Warnings:
-Warning	4112	Attempt to read unversioned field `b` in historical query
-select a, b from t;
-a	b
-1	2
-3	4
-select count(*) from t for system_time as of timestamp now(6) group by b;
-count(*)
-2
-Warnings:
-Warning	4112	Attempt to read unversioned field `b` in historical query
 select * from t for system_time as of timestamp now(6) group by b having b=2;
 a	b
 Warnings:
@@ -101,6 +70,10 @@ select count(*), b from t for system_time as of timestamp now(6) group by b havi
 count(*)	b
 Warnings:
 Warning	4112	Attempt to read unversioned field `b` in historical query
+select a, b from t;
+a	b
+1	2
+3	4
 create or replace table t (
 a int,
 b int not null without system versioning

mysql-test/suite/versioning/r/select.result

@@ -144,28 +144,47 @@ NULL	NULL	2	1
 NULL	NULL	3	1
 delete from t1;
 delete from t2;
-select t1.x as IJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 inner join t2 on t1.x = t2.x
+explain extended select * from (select t1.x as IJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 inner join t2 on t1.x = t2.x)
-for system_time as of timestamp @t0;
+for system_time as of timestamp @t0 as t;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where; Using join buffer (flat, BNL join)
+Warnings:
+Note	1003	select `test`.`t1`.`x` AS `IJ2_x1`,`test`.`t1`.`y` AS `y1`,`test`.`t2`.`x` AS `x2`,`test`.`t2`.`y` AS `y2` from `test`.`t1` FOR SYSTEM_TIME ALL join `test`.`t2` FOR SYSTEM_TIME ALL where `test`.`t1`.`x` = `test`.`t2`.`x` and `test`.`t1`.`sys_trx_end` > @`t0` and `test`.`t1`.`sys_trx_start` <= @`t0` and `test`.`t1`.`sys_trx_end` > @`t0` and `test`.`t1`.`sys_trx_start` <= @`t0` and `test`.`t2`.`sys_trx_end` > @`t0` and `test`.`t2`.`sys_trx_start` <= @`t0`
+explain extended select * from (select t1.x as LJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 left join t2 on t1.x = t2.x)
+for system_time as of timestamp @t0 as t;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
+1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where; Using join buffer (flat, BNL join)
+Warnings:
+Note	1003	select `test`.`t1`.`x` AS `LJ2_x1`,`test`.`t1`.`y` AS `y1`,`test`.`t2`.`x` AS `x2`,`test`.`t2`.`y` AS `y2` from `test`.`t1` FOR SYSTEM_TIME ALL left join `test`.`t2` FOR SYSTEM_TIME ALL on(`test`.`t2`.`x` = `test`.`t1`.`x` and `test`.`t2`.`sys_trx_end` > @`t0` and `test`.`t2`.`sys_trx_start` <= @`t0`) where `test`.`t1`.`sys_trx_end` > @`t0` and `test`.`t1`.`sys_trx_start` <= @`t0` and `test`.`t1`.`sys_trx_end` > @`t0` and `test`.`t1`.`sys_trx_start` <= @`t0`
+explain extended select * from (select t1.x as RJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 right join t2 on t1.x = t2.x)
+for system_time as of timestamp @t0 as t;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where; Using join buffer (flat, BNL join)
+Warnings:
+Note	1003	select `test`.`t1`.`x` AS `RJ2_x1`,`test`.`t1`.`y` AS `y1`,`test`.`t2`.`x` AS `x2`,`test`.`t2`.`y` AS `y2` from `test`.`t2` FOR SYSTEM_TIME ALL join `test`.`t1` FOR SYSTEM_TIME ALL where `test`.`t1`.`x` = `test`.`t2`.`x` and `test`.`t1`.`sys_trx_end` > @`t0` and `test`.`t1`.`sys_trx_start` <= @`t0` and `test`.`t1`.`sys_trx_end` > @`t0` and `test`.`t1`.`sys_trx_start` <= @`t0` and `test`.`t2`.`sys_trx_end` > @`t0` and `test`.`t2`.`sys_trx_start` <= @`t0`
+select * from (select t1.x as IJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 inner join t2 on t1.x = t2.x)
+for system_time as of timestamp @t0 as t;
 IJ2_x1	y1	x2	y2
 1	1	1	2
 1	2	1	2
 1	3	1	2
-select t1.x as LJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 left join t2 on t1.x = t2.x
+select * from (select t1.x as LJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 left join t2 on t1.x = t2.x)
-for system_time as of timestamp @t0;
+for system_time as of timestamp @t0 as t;
 LJ2_x1	y1	x2	y2
 1	1	1	2
 1	2	1	2
 1	3	1	2
 4	4	NULL	NULL
 5	5	NULL	NULL
-select t1.x as RJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 right join t2 on t1.x = t2.x
+select * from (select t1.x as RJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 right join t2 on t1.x = t2.x)
-for system_time as of timestamp @t0;
+for system_time as of timestamp @t0 as t;
 RJ2_x1	y1	x2	y2
 1	1	1	2
 1	2	1	2
 1	3	1	2
-NULL	NULL	2	1
-NULL	NULL	3	1
 drop table t1;
 drop table t2;
 create table t1(
@@ -280,8 +299,9 @@ select * from t1, t2 for system_time all;
 x	y
 1	1
 2	1
-select * from t1 for system_time all, t2 for system_time all for system_time all;
+select * from (select * from t1 for system_time all, t2 for system_time all)
-ERROR HY000: Unused clause: 'SYSTEM_TIME'
+for system_time all as t;
+ERROR HY000: SYSTEM_TIME is not allowed outside historical `t`
 ### Issue #365, bug 4 (related to #226, optimized fields)
 create or replace table t1 (i int, b int) with system versioning;
 insert into t1 values (0, 0), (0, 0);

mysql-test/suite/versioning/r/select_sp.result

@@ -77,12 +77,12 @@ select t1.x as LJ1_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 left join t2 o
 select t1.x as RJ1_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 right join t2 on t1.x = t2.x;
 delete from t1;
 delete from t2;
-select t1.x as IJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 inner join t2 on t1.x = t2.x
+select IJ2_x1,y1,x2,y2 from (select t1.x as IJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 inner join t2 on t1.x = t2.x)
-for system_time as of timestamp @t0;
+for system_time as of timestamp @t0 as t;
-select t1.x as LJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 left join t2 on t1.x = t2.x
+select LJ2_x1,y1,x2,y2 from (select t1.x as LJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 left join t2 on t1.x = t2.x)
-for system_time as of timestamp @t0;
+for system_time as of timestamp @t0 as t;
-select t1.x as RJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 right join t2 on t1.x = t2.x
+select RJ2_x1,y1,x2,y2 from (select t1.x as RJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 right join t2 on t1.x = t2.x)
-for system_time as of timestamp @t0;
+for system_time as of timestamp @t0 as t;
 drop table t1;
 drop table t2;
 end~~
@@ -207,8 +207,6 @@ RJ2_x1	y1	x2	y2
 1	1	1	2
 1	2	1	2
 1	3	1	2
-NULL	NULL	2	1
-NULL	NULL	3	1
 create table t1(
 A int
 ) with system versioning;
@@ -321,8 +319,10 @@ select * from t1, t2 for system_time all;
 x	y
 1	1
 2	1
-select * from t1 for system_time all, t2 for system_time all for system_time all;
+select * from (select * from t1 for system_time all, t2 for system_time all) for system_time all as t;
-ERROR HY000: Unused clause: 'SYSTEM_TIME'
+ERROR HY000: SYSTEM_TIME is not allowed outside historical `t`
+select * from (t1 for system_time all join t2 for system_time all) for system_time all;
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '' at line 1
 drop view v1;
 drop table t1, t2;
 call innodb_verify_vtq(27);

mysql-test/suite/versioning/r/simple.result

@@ -42,31 +42,32 @@ where d.dept_id = 10
 and d.dept_id = e.dept_id;
 emp_id	dept_id	name	salary	dept_id	name
 1	10	bill	2000	10	accounting
-select * from emp e, dept d
+select * from
+emp for system_time from timestamp @ts_1 to timestamp @ts_2 e,
+dept for system_time from timestamp @ts_1 to timestamp @ts_2 d
 where d.dept_id = 10
-and d.dept_id = e.dept_id
+and d.dept_id = e.dept_id;
-for system_time from timestamp @ts_1 to timestamp @ts_2;
 emp_id	dept_id	name	salary	sys_trx_start	sys_trx_end	dept_id	name	sys_trx_start	sys_trx_end
+set statement versioning_asof_timestamp=@ts_0 for
 select * from emp e, dept d
 where d.dept_id = 10
-and d.dept_id = e.dept_id
+and d.dept_id = e.dept_id;
-for system_time as of timestamp @ts_0;
 emp_id	dept_id	name	salary	dept_id	name
+set statement versioning_asof_timestamp=@ts_1 for
 select * from emp e, dept d
 where d.dept_id = 10
-and d.dept_id = e.dept_id
+and d.dept_id = e.dept_id;
-for system_time as of timestamp @ts_1;
 emp_id	dept_id	name	salary	dept_id	name
+set statement versioning_asof_timestamp=@ts_2 for
 select * from emp e, dept d
 where d.dept_id = 10
-and d.dept_id = e.dept_id
+and d.dept_id = e.dept_id;
-for system_time as of timestamp @ts_2;
 emp_id	dept_id	name	salary	dept_id	name
 1	10	bill	1000	10	accounting
+set statement versioning_asof_timestamp=@ts_3 for
 select * from emp e, dept d
 where d.dept_id = 10
-and d.dept_id = e.dept_id
+and d.dept_id = e.dept_id;
-for system_time as of timestamp @ts_3;
 emp_id	dept_id	name	salary	dept_id	name
 1	10	bill	2000	10	accounting
 drop table emp, dept;

mysql-test/suite/versioning/t/cte.test

@@ -94,8 +94,8 @@ insert emp values (4, 'john', 1);
 insert addr values (4, 'Paris');
 with ancestors as (select * from emp natural join addr) select * from ancestors;
 with ancestors as (select * from emp natural join addr) select * from ancestors for system_time all;
-with ancestors as (select * from emp natural join addr where 1 for system_time all) select * from ancestors;
+with ancestors as (select * from (select * from emp natural join addr) for system_time all as t) select * from ancestors;
-select * from emp natural join addr where 1 for system_time all;
+select * from (select * from emp natural join addr) for system_time all as t;
 
 drop table emp;
 drop table dept;

mysql-test/suite/versioning/t/derived.test

@@ -57,19 +57,18 @@ as
 select * from ancestors";
 prepare stmt from @tmp; execute stmt; drop prepare stmt;
 
+#385
 with recursive
 ancestors
 as
 (
   select e.emp_id, e.name, e.mgr
-  from emp as e
+  from emp for system_time as of timestamp @ts as e
   where name = 'bill'
-  for system_time as of timestamp @ts
   union
   select ee.emp_id, ee.name, ee.mgr
-  from emp as ee, ancestors as a
+  from emp for system_time as of timestamp @ts as ee, ancestors as a
   where ee.mgr = a.emp_id
-  for system_time as of timestamp @ts
 )
 select * from ancestors;
 set @tmp= "
@@ -78,14 +77,12 @@ ancestors
 as
 (
   select e.emp_id, e.name, e.mgr
-  from emp as e
+  from emp for system_time as of timestamp @ts as e
   where name = 'bill'
-  for system_time as of timestamp @ts
   union
   select ee.emp_id, ee.name, ee.mgr
-  from emp as ee, ancestors as a
+  from emp for system_time as of timestamp @ts as ee, ancestors as a
   where ee.mgr = a.emp_id
-  for system_time as of timestamp @ts
 )
 select * from ancestors";
 prepare stmt from @tmp; execute stmt; drop prepare stmt;
@@ -112,7 +109,7 @@ with s1 as (select * from t1 for system_time as of timestamp @t0, t2) select * f
 select * from (select *, t1.sys_trx_end from t2, t1 for system_time as of timestamp @t0) as s2;
 with s3 as (select *, t1.sys_trx_end from t2, t1 for system_time as of timestamp @t0) select * from s3;
 --echo # SYSTEM_TIME propagation from outer to inner
-select * from (select *, t1.sys_trx_start from t2 for system_time as of current_timestamp, t1) as s4 for system_time as of timestamp @t0;
+select * from (select *, t1.sys_trx_start from t2 for system_time as of current_timestamp, t1) for system_time as of timestamp @t0 as s4;
 with s5 as (select *, t1.sys_trx_start from t2 for system_time as of current_timestamp, t1) select * from s5 for system_time as of timestamp @t0;
 with s6 as (select *, t1.sys_trx_start from t2 for system_time as of current_timestamp, t1) select * from s6 for system_time as of timestamp @t0;
 
@@ -130,7 +127,7 @@ select * from (select *, vt1.sys_trx_end from t2, vt1) as s0;
 
 --echo ### SYSTEM_TIME clash
 --error ER_VERS_SYSTEM_TIME_CLASH
-select * from (select * from t1 for system_time all) dt0 for system_time all;
+select * from (select * from t1 for system_time all) for system_time all as dt0;
 --error ER_VERS_SYSTEM_TIME_CLASH
 select * from vt1 for system_time all;
 --error ER_VERS_SYSTEM_TIME_CLASH

mysql-test/suite/versioning/t/optimized.test

@@ -9,23 +9,16 @@ select * from t;
 select a from t for system_time as of timestamp now(6);
 select a, b, b+0 from t for system_time as of timestamp now(6);
 select * from t for system_time as of timestamp now(6);
-select count(*) from t group by b for system_time as of timestamp now(6);
+select count(*) from t for system_time as of timestamp now(6) group by b;
 select * from t for system_time as of timestamp now(6) order by b asc;
 select * from t for system_time as of timestamp now(6) order by b desc;
-select * from t group by a having a=2 for system_time as of timestamp now(6);
+select * from t for system_time as of timestamp now(6) group by a having a=2;
-select * from t group by b having b=2 for system_time as of timestamp now(6);
-select a from t where b=2 for system_time as of timestamp now(6);
-select a from t where b=NULL for system_time as of timestamp now(6);
-select a from t where b is NULL for system_time as of timestamp now(6);
-select count(*), b from t group by b having b=NULL for system_time as of timestamp now(6);
-select a, b from t;
-
-select count(*) from t for system_time as of timestamp now(6) group by b;
 select * from t for system_time as of timestamp now(6) group by b having b=2;
 select a from t for system_time as of timestamp now(6) where b=2;
 select a from t for system_time as of timestamp now(6) where b=NULL;
 select a from t for system_time as of timestamp now(6) where b is NULL;
 select count(*), b from t for system_time as of timestamp now(6) group by b having b=NULL;
+select a, b from t;
 
 create or replace table t (
   a int,

mysql-test/suite/versioning/t/select.test

@@ -84,12 +84,21 @@ select t1.x as RJ1_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 right join t2
 delete from t1;
 delete from t2;
 
-select t1.x as IJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 inner join t2 on t1.x = t2.x
+#384
-for system_time as of timestamp @t0;
+explain extended select * from (select t1.x as IJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 inner join t2 on t1.x = t2.x)
-select t1.x as LJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 left join t2 on t1.x = t2.x
+for system_time as of timestamp @t0 as t;
-for system_time as of timestamp @t0;
+explain extended select * from (select t1.x as LJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 left join t2 on t1.x = t2.x)
-select t1.x as RJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 right join t2 on t1.x = t2.x
+for system_time as of timestamp @t0 as t;
-for system_time as of timestamp @t0;
+#383
+explain extended select * from (select t1.x as RJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 right join t2 on t1.x = t2.x)
+for system_time as of timestamp @t0 as t;
+
+select * from (select t1.x as IJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 inner join t2 on t1.x = t2.x)
+for system_time as of timestamp @t0 as t;
+select * from (select t1.x as LJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 left join t2 on t1.x = t2.x)
+for system_time as of timestamp @t0 as t;
+select * from (select t1.x as RJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 right join t2 on t1.x = t2.x)
+for system_time as of timestamp @t0 as t;
 
 drop table t1;
 drop table t2;
@@ -179,8 +188,9 @@ delete from t1 where x = 3;
 insert into t2 values (1);
 select * from t1, t2 for system_time all;
 
---error ER_VERS_UNUSED_CLAUSE
+--error ER_VERS_SYSTEM_TIME_CLASH
-select * from t1 for system_time all, t2 for system_time all for system_time all;
+select * from (select * from t1 for system_time all, t2 for system_time all)
+for system_time all as t;
 
 --echo ### Issue #365, bug 4 (related to #226, optimized fields)
 create or replace table t1 (i int, b int) with system versioning;

mysql-test/suite/versioning/t/select_sp.test

@@ -93,12 +93,12 @@ begin
   delete from t1;
   delete from t2;
 
-  select t1.x as IJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 inner join t2 on t1.x = t2.x
+  select IJ2_x1,y1,x2,y2 from (select t1.x as IJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 inner join t2 on t1.x = t2.x)
-  for system_time as of timestamp @t0;
+  for system_time as of timestamp @t0 as t;
-  select t1.x as LJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 left join t2 on t1.x = t2.x
+  select LJ2_x1,y1,x2,y2 from (select t1.x as LJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 left join t2 on t1.x = t2.x)
-  for system_time as of timestamp @t0;
+  for system_time as of timestamp @t0 as t;
-  select t1.x as RJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 right join t2 on t1.x = t2.x
+  select RJ2_x1,y1,x2,y2 from (select t1.x as RJ2_x1, t1.y as y1, t2.x as x2, t2.y as y2 from t1 right join t2 on t1.x = t2.x)
-  for system_time as of timestamp @t0;
+  for system_time as of timestamp @t0 as t;
 
   drop table t1;
   drop table t2;
@@ -192,8 +192,10 @@ delete from t1 where x = 3;
 insert into t2 values (1);
 select * from t1, t2 for system_time all;
 
---error ER_VERS_UNUSED_CLAUSE
+--error ER_VERS_SYSTEM_TIME_CLASH
-select * from t1 for system_time all, t2 for system_time all for system_time all;
+select * from (select * from t1 for system_time all, t2 for system_time all) for system_time all as t;
+--error ER_PARSE_ERROR
+select * from (t1 for system_time all join t2 for system_time all) for system_time all;
 
 drop view v1;
 drop table t1, t2;

mysql-test/suite/versioning/t/simple.test

@@ -44,29 +44,30 @@ select * from emp e, dept d
 where d.dept_id = 10
   and d.dept_id = e.dept_id;
 
-select * from emp e, dept d
+select * from
+  emp for system_time from timestamp @ts_1 to timestamp @ts_2 e,
+  dept for system_time from timestamp @ts_1 to timestamp @ts_2 d
 where d.dept_id = 10
-  and d.dept_id = e.dept_id
+  and d.dept_id = e.dept_id;
-for system_time from timestamp @ts_1 to timestamp @ts_2;
 
+set statement versioning_asof_timestamp=@ts_0 for
 select * from emp e, dept d
 where d.dept_id = 10
-  and d.dept_id = e.dept_id
+  and d.dept_id = e.dept_id;
-for system_time as of timestamp @ts_0;
 
+set statement versioning_asof_timestamp=@ts_1 for
 select * from emp e, dept d
 where d.dept_id = 10
-  and d.dept_id = e.dept_id
+  and d.dept_id = e.dept_id;
-for system_time as of timestamp @ts_1;
 
+set statement versioning_asof_timestamp=@ts_2 for
 select * from emp e, dept d
 where d.dept_id = 10
-  and d.dept_id = e.dept_id
+  and d.dept_id = e.dept_id;
-for system_time as of timestamp @ts_2;
 
+set statement versioning_asof_timestamp=@ts_3 for
 select * from emp e, dept d
 where d.dept_id = 10
-  and d.dept_id = e.dept_id
+  and d.dept_id = e.dept_id;
-for system_time as of timestamp @ts_3;
 
 drop table emp, dept;

sql/sql_yacc.yy

@@ -892,10 +892,10 @@ bool my_yyoverflow(short **a, YYSTYPE **b, ulong *yystacksize);
 %parse-param { THD *thd }
 %lex-param { THD *thd }
 /*
-  Currently there are 125 shift/reduce conflicts.
+  Currently there are 122 shift/reduce conflicts.
   We should not introduce new conflicts any more.
 */
-%expect 125
+%expect 122
 
 /*
    Comments for TOKENS.
@@ -9138,7 +9138,6 @@ table_expression:
           opt_group_clause
           opt_having_clause
           opt_window_clause
-          opt_system_time_clause
         ;
 
 opt_table_expression:
@@ -9188,31 +9187,6 @@ opt_trans_or_timestamp:
           }
         ;
 
-opt_system_time_clause:
-          /* empty */
-          {}
-        | FOR_SYSTEM_TIME_SYM system_time_expr
-          {
-            DBUG_ASSERT(Select);
-            int used= 0;
-            if (Lex->vers_conditions)
-            {
-              for (TABLE_LIST *table= Select->table_list.first; table; table= table->next_local)
-              {
-                if (!table->vers_conditions)
-                {
-                  table->vers_conditions= Lex->vers_conditions;
-                  used++;
-                }
-              }
-              if (!used)
-              {
-                my_yyabort_error((ER_VERS_UNUSED_CLAUSE, MYF(0), "SYSTEM_TIME"));
-              }
-            }
-          }
-        ;
-
 opt_for_system_time_clause:
           /* empty */
           {
@@ -11862,7 +11836,10 @@ table_primary_derived:
                 !$$->derived->first_select()->next_select())
               $$->select_lex->add_where_field($$->derived->first_select());
             if ($5)
+            {
+              MYSQL_YYABORT_UNLESS(!$3);
               $$->vers_conditions= Lex->vers_conditions;
+            }
           }
           /* Represents derived table with WITH clause */
         | '(' get_select_lex subselect_start