Parser: unreserve keywords

SELECT * FROM t1 FOR SYSTEM_TIME AS OF ...

becomes ambiguous, but it's the same as with

SELECT ... UNION SELECT ... ORDER BY ...

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

@@ -82,13 +82,13 @@ 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 system_time all) select * from ancestors;
+with ancestors as (select * from emp natural join addr where 1 for system_time all) 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 system_time all;
+select * from emp natural join addr where 1 for system_time all;
 emp_id	name	mgr	address
 1	bill	0	Moscow
 2	bill	1	New York

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

@@ -93,12 +93,12 @@ as
 select e.emp_id, e.name, e.mgr
 from emp as e
 where name = 'bill'
-  system_time as of timestamp @ts
+  for system_time as of timestamp @ts
 union
 select ee.emp_id, ee.name, ee.mgr
 from emp as ee, ancestors as a
 where ee.mgr = a.emp_id
-system_time as of timestamp @ts
+for system_time as of timestamp @ts
 )
 select * from ancestors;
 emp_id	name	mgr
@@ -113,12 +113,12 @@ as
   select e.emp_id, e.name, e.mgr
   from emp as e
   where name = 'bill'
-  system_time as of timestamp @ts
+  for system_time as of timestamp @ts
   union
   select ee.emp_id, ee.name, ee.mgr
   from emp as ee, ancestors as a
   where ee.mgr = a.emp_id
-  system_time as of timestamp @ts
+  for system_time as of timestamp @ts
 )
 select * from ancestors";
 prepare stmt from @tmp;
@@ -152,13 +152,13 @@ y	x
 with s3 as (select *, t1.sys_trx_end from t2, t1 for system_time as of timestamp @t0) select * from s3;
 y	x
 10	1
-select * from (select *, t1.sys_trx_start from t2 for system_time as of now, t1) as s4 system_time as of timestamp @t0;
+select * from (select *, t1.sys_trx_start from t2 for system_time as of now, t1) as s4 for system_time as of timestamp @t0;
 y	x
 10	1
 with s5 as (select *, t1.sys_trx_start from t2 for system_time as of now, t1) select * from s5 for system_time as of timestamp @t0;
 y	x
 10	1
-with s6 as (select *, t1.sys_trx_start from t2 for system_time as of now, t1) select * from s6 system_time as of timestamp @t0;
+with s6 as (select *, t1.sys_trx_start from t2 for system_time as of now, t1) select * from s6 for system_time as of timestamp @t0;
 y	x
 10	1
 set @q= concat("create view vt1 as select * from t1 for system_time as of timestamp '", @t0, "'");
@@ -174,7 +174,7 @@ x	y
 select * from (select *, vt1.sys_trx_end from t2, vt1) as s0;
 y	x
 10	1
-select * from (select *, vt1.sys_trx_start from t2 for system_time as of now, vt1) as s0 system_time as of timestamp @t0;
+select * from (select *, vt1.sys_trx_start from t2 for system_time as of now, vt1) as s0 for system_time as of timestamp @t0;
 y	x
 10	1
 drop table t1, t2;

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

@@ -25,7 +25,7 @@ a	b
 3	NULL
 Warnings:
 Warning	4109	Attempt to read unversioned field `b` in historical query
-select count(*) from t group by b system_time as of timestamp now(6);
+select count(*) from t group by b for system_time as of timestamp now(6);
 count(*)
 2
 Warnings:
@@ -44,29 +44,29 @@ a	b
 Warnings:
 Warning	4109	Attempt to read unversioned field `b` in historical query
 Warning	4109	Attempt to read unversioned field `b` in historical query
-select * from t group by a having a=2 system_time as of timestamp now(6);
+select * from t group by a having a=2 for system_time as of timestamp now(6);
 a	b
 Warnings:
 Warning	4109	Attempt to read unversioned field `b` in historical query
-select * from t group by b having b=2 system_time as of timestamp now(6);
+select * from t group by b having b=2 for system_time as of timestamp now(6);
 a	b
 Warnings:
 Warning	4109	Attempt to read unversioned field `b` in historical query
-select a from t where b=2 system_time as of timestamp now(6);
+select a from t where b=2 for system_time as of timestamp now(6);
 a
 Warnings:
 Warning	4109	Attempt to read unversioned field `b` in historical query
-select a from t where b=NULL system_time as of timestamp now(6);
+select a from t where b=NULL for system_time as of timestamp now(6);
 a
 Warnings:
 Warning	4109	Attempt to read unversioned field `b` in historical query
-select a from t where b is NULL system_time as of timestamp now(6);
+select a from t where b is NULL for system_time as of timestamp now(6);
 a
 1
 3
 Warnings:
 Warning	4109	Attempt to read unversioned field `b` in historical query
-select count(*), b from t group by b having b=NULL 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);
 count(*)	b
 Warnings:
 Warning	4109	Attempt to read unversioned field `b` in historical query

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

@@ -145,13 +145,13 @@ 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
-system_time as of timestamp @t0;
+for system_time as of timestamp @t0;
 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
-system_time as of timestamp @t0;
+for system_time as of timestamp @t0;
 LJ2_x1	y1	x2	y2
 1	1	1	2
 1	2	1	2
@@ -159,7 +159,7 @@ LJ2_x1	y1	x2	y2
 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
-system_time as of timestamp @t0;
+for system_time as of timestamp @t0;
 RJ2_x1	y1	x2	y2
 1	1	1	2
 1	2	1	2
@@ -276,12 +276,11 @@ create or replace table t2 (y int) with system versioning;
 insert into t1 values (1), (2), (3);
 delete from t1 where x = 3;
 insert into t2 values (1);
-select * from t1, t2 system_time all;
+select * from t1, t2 for system_time all;
 x	y
 1	1
 2	1
-3	1
+select * from t1 for system_time all, t2 for system_time all for system_time all;
-select * from t1 for system_time all, t2 for system_time all system_time all;
 ERROR HY000: Unused clause: 'SYSTEM_TIME'
 ### 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/r/select_sp.result

@@ -78,11 +78,11 @@ 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
-system_time as of timestamp @t0;
+for system_time as of timestamp @t0;
 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
-system_time as of timestamp @t0;
+for system_time as of timestamp @t0;
 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
-system_time as of timestamp @t0;
+for system_time as of timestamp @t0;
 drop table t1;
 drop table t2;
 end~~
@@ -317,12 +317,11 @@ create or replace table t2 (y int) with system versioning;
 insert into t1 values (1), (2), (3);
 delete from t1 where x = 3;
 insert into t2 values (1);
-select * from t1, t2 system_time all;
+select * from t1, t2 for system_time all;
 x	y
 1	1
 2	1
-3	1
+select * from t1 for system_time all, t2 for system_time all for system_time all;
-select * from t1 for system_time all, t2 for system_time all system_time all;
 ERROR HY000: Unused clause: 'SYSTEM_TIME'
 drop view v1;
 drop table t1, t2;

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

@@ -44,28 +44,28 @@ emp_id	dept_id	name	salary	dept_id	name
 select * from emp e, dept d
 where d.dept_id = 10
 and d.dept_id = e.dept_id
-system_time from timestamp @ts_1 to timestamp @ts_2;
+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
 select * from emp e, dept d
 where d.dept_id = 10
 and d.dept_id = e.dept_id
-system_time as of timestamp @ts_0;
+for system_time as of timestamp @ts_0;
 emp_id	dept_id	name	salary	dept_id	name
 select * from emp e, dept d
 where d.dept_id = 10
 and d.dept_id = e.dept_id
-system_time as of timestamp @ts_1;
+for system_time as of timestamp @ts_1;
 emp_id	dept_id	name	salary	dept_id	name
 select * from emp e, dept d
 where d.dept_id = 10
 and d.dept_id = e.dept_id
-system_time as of timestamp @ts_2;
+for system_time as of timestamp @ts_2;
 emp_id	dept_id	name	salary	dept_id	name
 1	10	bill	1000	10	accounting
 select * from emp e, dept d
 where d.dept_id = 10
 and d.dept_id = e.dept_id
-system_time as of timestamp @ts_3;
+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

@@ -76,8 +76,8 @@ 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 system_time all) select * from ancestors;
+with ancestors as (select * from emp natural join addr where 1 for system_time all) select * from ancestors;
-select * from emp natural join addr system_time all;
+select * from emp natural join addr where 1 for system_time all;
 
 drop table emp;
 drop table dept;

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

@@ -64,12 +64,12 @@ as
   select e.emp_id, e.name, e.mgr
   from emp as e
   where name = 'bill'
-  system_time as of timestamp @ts
+  for system_time as of timestamp @ts
   union
   select ee.emp_id, ee.name, ee.mgr
   from emp as ee, ancestors as a
   where ee.mgr = a.emp_id
-  system_time as of timestamp @ts
+  for system_time as of timestamp @ts
 )
 select * from ancestors;
 set @tmp= "
@@ -80,12 +80,12 @@ as
   select e.emp_id, e.name, e.mgr
   from emp as e
   where name = 'bill'
-  system_time as of timestamp @ts
+  for system_time as of timestamp @ts
   union
   select ee.emp_id, ee.name, ee.mgr
   from emp as ee, ancestors as a
   where ee.mgr = a.emp_id
-  system_time as of timestamp @ts
+  for system_time as of timestamp @ts
 )
 select * from ancestors";
 prepare stmt from @tmp; execute stmt; drop prepare stmt;
@@ -112,9 +112,9 @@ 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;
 # system_time propagation from outer to inner
-select * from (select *, t1.sys_trx_start from t2 for system_time as of now, t1) as s4 system_time as of timestamp @t0;
+select * from (select *, t1.sys_trx_start from t2 for system_time as of now, t1) as s4 for system_time as of timestamp @t0;
 with s5 as (select *, t1.sys_trx_start from t2 for system_time as of now, 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 now, t1) select * from s6 system_time as of timestamp @t0;
+with s6 as (select *, t1.sys_trx_start from t2 for system_time as of now, t1) select * from s6 for system_time as of timestamp @t0;
 
 # VIEW instead of t1
 set @q= concat("create view vt1 as select * from t1 for system_time as of timestamp '", @t0, "'");
@@ -127,7 +127,7 @@ select * from (select * from vt1, t2) as s0;
 # leading table selection
 select * from (select *, vt1.sys_trx_end from t2, vt1) as s0;
 # system_time propagation from outer to inner
-select * from (select *, vt1.sys_trx_start from t2 for system_time as of now, vt1) as s0 system_time as of timestamp @t0;
+select * from (select *, vt1.sys_trx_start from t2 for system_time as of now, vt1) as s0 for system_time as of timestamp @t0;
 
 drop table t1, t2;
 drop view vt1;

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

@@ -9,15 +9,15 @@ 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 system_time as of timestamp now(6);
+select count(*) from t group by b for system_time as of timestamp now(6);
 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 system_time as of timestamp now(6);
+select * from t group by a having a=2 for system_time as of timestamp now(6);
-select * from t group by b having b=2 system_time as of timestamp now(6);
+select * from t group by b having b=2 for system_time as of timestamp now(6);
-select a from t where b=2 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 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 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 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;

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

@@ -85,11 +85,11 @@ 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
-system_time as of timestamp @t0;
+for system_time as of timestamp @t0;
 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
-system_time as of timestamp @t0;
+for system_time as of timestamp @t0;
 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
-system_time as of timestamp @t0;
+for system_time as of timestamp @t0;
 
 drop table t1;
 drop table t2;
@@ -177,10 +177,10 @@ create or replace table t2 (y int) with system versioning;
 insert into t1 values (1), (2), (3);
 delete from t1 where x = 3;
 insert into t2 values (1);
-select * from t1, t2 system_time all;
+select * from t1, t2 for system_time all;
 
 --error ER_VERS_UNUSED_CLAUSE
-select * from t1 for system_time all, t2 for system_time all system_time all;
+select * from t1 for system_time all, t2 for system_time all for system_time all;
 
 --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

@@ -94,11 +94,11 @@ begin
   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
-  system_time as of timestamp @t0;
+  for system_time as of timestamp @t0;
   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
-  system_time as of timestamp @t0;
+  for system_time as of timestamp @t0;
   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
-  system_time as of timestamp @t0;
+  for system_time as of timestamp @t0;
 
   drop table t1;
   drop table t2;
@@ -190,10 +190,10 @@ create or replace table t2 (y int) with system versioning;
 insert into t1 values (1), (2), (3);
 delete from t1 where x = 3;
 insert into t2 values (1);
-select * from t1, t2 system_time all;
+select * from t1, t2 for system_time all;
 
 --error ER_VERS_UNUSED_CLAUSE
-select * from t1 for system_time all, t2 for system_time all system_time all;
+select * from t1 for system_time all, t2 for system_time all for system_time all;
 
 drop view v1;
 drop table t1, t2;

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

@@ -45,26 +45,26 @@ where d.dept_id = 10
 select * from emp e, dept d
 where d.dept_id = 10
   and d.dept_id = e.dept_id
-system_time from timestamp @ts_1 to timestamp @ts_2;
+for system_time from timestamp @ts_1 to timestamp @ts_2;
 
 select * from emp e, dept d
 where d.dept_id = 10
   and d.dept_id = e.dept_id
-system_time as of timestamp @ts_0;
+for system_time as of timestamp @ts_0;
 
 select * from emp e, dept d
 where d.dept_id = 10
   and d.dept_id = e.dept_id
-system_time as of timestamp @ts_1;
+for system_time as of timestamp @ts_1;
 
 select * from emp e, dept d
 where d.dept_id = 10
   and d.dept_id = e.dept_id
-system_time as of timestamp @ts_2;
+for system_time as of timestamp @ts_2;
 
 select * from emp e, dept d
 where d.dept_id = 10
   and d.dept_id = e.dept_id
-system_time as of timestamp @ts_3;
+for system_time as of timestamp @ts_3;
 
 drop table emp, dept;

sql/sql_yacc.yy

@@ -871,15 +871,16 @@ bool my_yyoverflow(short **a, YYSTYPE **b, ulong *yystacksize);
 %parse-param { THD *thd }
 %lex-param { THD *thd }
 /*
-  Currently there are 117 shift/reduce conflicts.
+  Currently there are 124 shift/reduce conflicts.
   We should not introduce new conflicts any more.
 */
-%expect 117
+%expect 124
 
 /*
    Comments for TOKENS.
    For each token, please include in the same line a comment that contains
    the following tags:
+   SQL-2011-R : Reserved keyword as per SQL-2011
    SQL-2011-N : Non Reserved keyword as per SQL-2011
    SQL-2003-R : Reserved keyword as per SQL-2003
    SQL-2003-N : Non Reserved keyword as per SQL-2003
@@ -890,9 +891,6 @@ bool my_yyoverflow(short **a, YYSTYPE **b, ulong *yystacksize);
    INTERNAL   : Not a real token, lex optimization
    OPERATOR   : SQL operator
    FUTURE-USE : Reserved for future use
-   32N2439    : Reserved keywords per ISO/IEC PDTR 19075-2,
-                http://jtc1sc32.org/doc/N2401-2450/32N2439-text_for_ballot-PDTR_19075-2.pdf
-                System Versioned Tables
 
    This makes the code grep-able, and helps maintenance.
 */
@@ -1340,7 +1338,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b, ulong *yystacksize);
 %token  PERCENT_RANK_SYM
 %token  PERCENTILE_CONT_SYM
 %token  PERCENTILE_DISC_SYM
-%token  PERIOD_SYM                    /* 32N2439 */
+%token  PERIOD_SYM                    /* SQL-2011-R */
 %token  PERSISTENT_SYM
 %token  PHASE_SYM
 %token  PLUGINS_SYM
@@ -1507,8 +1505,8 @@ bool my_yyoverflow(short **a, YYSTYPE **b, ulong *yystacksize);
 %token  SWAPS_SYM
 %token  SWITCHES_SYM
 %token  SYSDATE
-%token  SYSTEM                        /* 32N2439 */
+%token  SYSTEM                        /* SQL-2011-R */
-%token  SYSTEM_TIME_SYM               /* 32N2439 */
+%token  SYSTEM_TIME_SYM               /* SQL-2011-R */
 %token  TABLES
 %token  TABLESPACE
 %token  TABLE_REF_PRIORITY
@@ -1579,7 +1577,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b, ulong *yystacksize);
 %token  VARIANCE_SYM
 %token  VARYING                       /* SQL-2003-R */
 %token  VAR_SAMP_SYM
-%token  VERSIONING_SYM                /* 32N2439 */
+%token  VERSIONING_SYM                /* SQL-2011-R */
 %token  VIA_SYM
 %token  VIEW_SYM                      /* SQL-2003-N */
 %token  VIRTUAL_SYM
@@ -9011,7 +9009,7 @@ opt_trans_or_timestamp:
 opt_system_time_clause:
           /* empty */
           {}
-        | SYSTEM_TIME_SYM system_time_expr
+        | FOR_SYSTEM_TIME_SYM system_time_expr
           {
             DBUG_ASSERT(Select);
             int used= 0;
@@ -15453,6 +15451,8 @@ keyword_sp_not_data_type:
         | SUSPEND_SYM              {}
         | SWAPS_SYM                {}
         | SWITCHES_SYM             {}
+        | SYSTEM                   {}
+        | SYSTEM_TIME_SYM          {}
         | TABLE_NAME_SYM           {}
         | TABLES                   {}
         | TABLE_CHECKSUM_SYM       {}
@@ -15478,6 +15478,7 @@ keyword_sp_not_data_type:
         | USER_SYM                 {}
         | USE_FRM                  {}
         | VARIABLES                {}
+        | VERSIONING_SYM           {}
         | VIEW_SYM                 {}
         | VIRTUAL_SYM              {}
         | VALUE_SYM                {}
@@ -15485,6 +15486,7 @@ keyword_sp_not_data_type:
         | WAIT_SYM                 {}
         | WEEK_SYM                 {}
         | WEIGHT_STRING_SYM        {}
+        | WITHOUT                  {}
         | WORK_SYM                 {}
         | X509_SYM                 {}
         | XML_SYM                  {}