MDEV-22439 Add FOR PORTION OF statements to the test for WITHOUT OVERLAPS

mysql-test/suite/period/engines.combinations

@@ -3,4 +3,5 @@ innodb
 default-storage-engine=innodb
 
 [myisam]
+innodb
 default-storage-engine=myisam

mysql-test/suite/period/r/overlaps.result

@@ -62,6 +62,61 @@ id	s	e
 1	2003-01-01	2003-02-01
 1	2003-03-01	2003-05-01
 1	2003-05-01	2003-07-01
+# UPDATE ... FOR PORTION test
+insert t values (2, '2003-04-15', '2003-05-01');
+update t for portion of p from '2003-01-01' to '2003-01-15'
+         set id= 2;
+select * from t;
+id	s	e
+1	2003-01-15	2003-02-01
+1	2003-03-01	2003-05-01
+1	2003-05-01	2003-07-01
+2	2003-01-01	2003-01-15
+2	2003-04-15	2003-05-01
+update t for portion of p from '2003-01-15' to '2003-02-01'
+         set id= 2;
+select * from t;
+id	s	e
+1	2003-03-01	2003-05-01
+1	2003-05-01	2003-07-01
+2	2003-01-01	2003-01-15
+2	2003-01-15	2003-02-01
+2	2003-04-15	2003-05-01
+# Next, test UPDATE ... FOR PORTION resulting with an error
+# Since MyISAM/Aria engines lack atomicity, the results would differ with
+# innodb. So a table is going to be copied to one with explicit engine.
+create table t_myisam (id int, s date, e date,
+period for p(s,e),
+primary key(id, p without overlaps))
+engine=myisam
+select * from t;
+update t_myisam for portion of p from '2003-04-01' to '2003-06-01'
+         set id= 2 order by s desc;
+ERROR 23000: Duplicate entry '2-2003-05-01-2003-04-01' for key 'PRIMARY'
+select * from t_myisam;
+id	s	e
+1	2003-03-01	2003-05-01
+1	2003-06-01	2003-07-01
+2	2003-01-01	2003-01-15
+2	2003-01-15	2003-02-01
+2	2003-04-15	2003-05-01
+2	2003-05-01	2003-06-01
+create table t_innodb (id int, s date, e date,
+period for p(s,e),
+primary key(id, p without overlaps))
+engine=innodb
+select * from t;
+update t_innodb for portion of p from '2003-04-01' to '2003-06-01'
+         set id= 2 order by s desc;
+ERROR 23000: Duplicate entry '2-2003-05-01-2003-04-01' for key 'PRIMARY'
+select * from t_innodb;
+id	s	e
+1	2003-03-01	2003-05-01
+1	2003-05-01	2003-07-01
+2	2003-01-01	2003-01-15
+2	2003-01-15	2003-02-01
+2	2003-04-15	2003-05-01
+drop table t_myisam, t_innodb;
 create or replace table t(id int, s date, e date,
 period for p(s,e),
 primary key(id, q without overlaps));

mysql-test/suite/period/t/overlaps.test

@@ -67,6 +67,47 @@ update t set e= '2003-05-01' where s = '2003-01-01';
 
 select * from t where year(s) = 2003;
 
+--echo # UPDATE ... FOR PORTION test
+insert t values (2, '2003-04-15', '2003-05-01');
+
+update t for portion of p from '2003-01-01' to '2003-01-15'
+         set id= 2;
+--sorted_result
+select * from t;
+
+update t for portion of p from '2003-01-15' to '2003-02-01'
+         set id= 2;
+--sorted_result
+select * from t;
+
+--echo # Next, test UPDATE ... FOR PORTION resulting with an error
+--echo # Since MyISAM/Aria engines lack atomicity, the results would differ with
+--echo # innodb. So a table is going to be copied to one with explicit engine.
+
+create table t_myisam (id int, s date, e date,
+                     period for p(s,e),
+                     primary key(id, p without overlaps))
+                     engine=myisam
+                     select * from t;
+--error ER_DUP_ENTRY
+update t_myisam for portion of p from '2003-04-01' to '2003-06-01'
+         set id= 2 order by s desc;
+--sorted_result
+select * from t_myisam;
+
+create table t_innodb (id int, s date, e date,
+                     period for p(s,e),
+                     primary key(id, p without overlaps))
+                     engine=innodb
+                     select * from t;
+--error ER_DUP_ENTRY
+update t_innodb for portion of p from '2003-04-01' to '2003-06-01'
+         set id= 2 order by s desc;
+--sorted_result
+select * from t_innodb;
+
+drop table t_myisam, t_innodb;
+
 --error ER_PERIOD_NOT_FOUND
 create or replace table t(id int, s date, e date,
                           period for p(s,e),