Better fix for bug#22830

Events: crash with procedure which alters events with function

Post-review CS

This fix also changes the handling of KILL command combined with
subquery. It changes the error message given back to "not supported",
from parse error. The error for CREATE|ALTER EVENT has also been changed
to generate "not supported yet" instead of parse error.
In case of a SP call, the error is "not supported yet". This change
cleans the parser from code which should not belong to there. Still
LEX::expr_allows_subselect is existant because it simplifies the handling
 of SQLCOM_HA_READ which forbids subselects.

3 files changed, 58 insertions, 16 deletions

diff --git a/mysql-test/r/events_bugs.result b/mysql-test/r/events_bugs.result
index 08be6924e03..363033e487a 100644
--- a/mysql-test/r/events_bugs.result
+++ b/mysql-test/r/events_bugs.result
@@ -206,13 +206,13 @@ drop event events_test.mysqltest_user1;
 drop user mysqltest_user1@localhost;
 drop database mysqltest_db1;
 create event e_53 on schedule at (select s1 from ttx) do drop table t;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'select s1 from ttx) do drop table t' at line 1
+ERROR 42000: This version of MySQL doesn't yet support 'Usage of subqueries or stored function calls as part of this statement'
 create event e_53 on schedule every (select s1 from ttx) second do drop table t;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'select s1 from ttx) second do drop table t' at line 1
+ERROR 42000: This version of MySQL doesn't yet support 'Usage of subqueries or stored function calls as part of this statement'
 create event e_53 on schedule every 5 second starts (select s1 from ttx) do drop table t;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'select s1 from ttx) do drop table t' at line 1
+ERROR 42000: This version of MySQL doesn't yet support 'Usage of subqueries or stored function calls as part of this statement'
 create event e_53 on schedule every 5 second ends (select s1 from ttx) do drop table t;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'select s1 from ttx) do drop table t' at line 1
+ERROR 42000: This version of MySQL doesn't yet support 'Usage of subqueries or stored function calls as part of this statement'
 drop event if exists e_16;
 drop procedure if exists p_16;
 create event e_16 on schedule every 1 second do set @a=5;
@@ -226,4 +226,46 @@ set @a= 6;
 call p_16();
 drop procedure p_16;
 drop event e_16;
+drop function if exists f22830;
+drop event if exists e22830;
+drop event if exists e22830_1;
+drop event if exists e22830_2;
+drop event if exists e22830_3;
+drop event if exists e22830_4;
+drop table if exists t1;
+drop table if exists t2;
+create table t1 (a int);
+insert into t1 values (2);
+create table t2 (a char(20));
+insert into t2 values ("e22830_1");
+create function f22830 () returns int return 5;
+create event e22830 on schedule every f22830() second do select 123;
+ERROR 42000: This version of MySQL doesn't yet support 'Usage of subqueries or stored function calls as part of this statement'
+create event e22830_1 on schedule every 1 hour do alter event e22830_1 on schedule every (select 8 from dual) hour;
+create event e22830_2 on schedule every 1 hour do alter event e22830_2 on schedule every (select 8 from t1) hour;
+create event e22830_3 on schedule every 1 hour do alter event e22830_3 on schedule every f22830() hour;
+create event e22830_4 on schedule every 1 hour do alter event e22830_4 on schedule every (select f22830() from dual) hour;
+select event_name, event_definition, interval_value, interval_field from information_schema.events order by event_name;
+event_name	event_definition	interval_value	interval_field
+e22830_1	alter event e22830_1 on schedule every (select 8 from dual) hour	1	HOUR
+e22830_2	alter event e22830_2 on schedule every (select 8 from t1) hour	1	HOUR
+e22830_3	alter event e22830_3 on schedule every f22830() hour	1	HOUR
+e22830_4	alter event e22830_4 on schedule every (select f22830() from dual) hour	1	HOUR
+set global event_scheduler=on;
+set global event_scheduler=off;
+select event_name, event_definition, interval_value, interval_field from information_schema.events order by event_name;
+event_name	event_definition	interval_value	interval_field
+e22830_1	alter event e22830_1 on schedule every (select 8 from dual) hour	8	HOUR
+e22830_2	alter event e22830_2 on schedule every (select 8 from t1) hour	1	HOUR
+e22830_3	alter event e22830_3 on schedule every f22830() hour	1	HOUR
+e22830_4	alter event e22830_4 on schedule every (select f22830() from dual) hour	1	HOUR
+drop function f22830;
+drop event (select a from t2);
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(select a from t2)' at line 1
+drop event e22830_1;
+drop event e22830_2;
+drop event e22830_3;
+drop event e22830_4;
+drop table t1;
+drop table t2;
 drop database events_test;
diff --git a/mysql-test/r/events_grant.result b/mysql-test/r/events_grant.result
index eda0759d518..a28c30a9345 100644
--- a/mysql-test/r/events_grant.result
+++ b/mysql-test/r/events_grant.result
@@ -4,7 +4,7 @@ CREATE EVENT one_event ON SCHEDULE EVERY 10 SECOND DO SELECT 123;
 SHOW EVENTS;
 Db	Name	Definer	Type	Execute at	Interval value	Interval field	Starts	Ends	Status
 events_test	one_event	root@localhost	RECURRING	NULL	10	SECOND	#	#	ENABLED
-SELECT EVENT_CATALOG, EVENT_SCHEMA, EVENT_NAME, DEFINER, EVENT_BODY, EVENT_DEFINITION, EVENT_TYPE, EXECUTE_AT, INTERVAL_VALUE, INTERVAL_FIELD, STATUS,ON_COMPLETION, EVENT_COMMENT from information_schema.events;
+SELECT EVENT_CATALOG, EVENT_SCHEMA, EVENT_NAME, DEFINER, EVENT_BODY, EVENT_DEFINITION, EVENT_TYPE, EXECUTE_AT, INTERVAL_VALUE, INTERVAL_FIELD, STATUS,ON_COMPLETION, EVENT_COMMENT FROM INFORMATION_SCHEMA.EVENTS ORDER BY EVENT_SCHEMA, EVENT_NAME;
 EVENT_CATALOG	EVENT_SCHEMA	EVENT_NAME	DEFINER	EVENT_BODY	EVENT_DEFINITION	EVENT_TYPE	EXECUTE_AT	INTERVAL_VALUE	INTERVAL_FIELD	STATUS	ON_COMPLETION	EVENT_COMMENT
 NULL	events_test	one_event	root@localhost	SQL	SELECT 123	RECURRING	NULL	10	SECOND	ENABLED	NOT PRESERVE	
 CREATE DATABASE events_test2;
@@ -57,37 +57,37 @@ USE events_test2;
 CREATE EVENT four_event ON SCHEDULE EVERY 20 SECOND DO SELECT 42;
 USE events_test;
 "We should see 4 events : one_event, two_event, three_event & four_event"
-SELECT EVENT_CATALOG, EVENT_SCHEMA, EVENT_NAME, DEFINER, EVENT_BODY, EVENT_DEFINITION, EVENT_TYPE, EXECUTE_AT, INTERVAL_VALUE, INTERVAL_FIELD, STATUS,ON_COMPLETION, EVENT_COMMENT FROM INFORMATION_SCHEMA.EVENTS;
+SELECT EVENT_CATALOG, EVENT_SCHEMA, EVENT_NAME, DEFINER, EVENT_BODY, EVENT_DEFINITION, EVENT_TYPE, EXECUTE_AT, INTERVAL_VALUE, INTERVAL_FIELD, STATUS,ON_COMPLETION, EVENT_COMMENT FROM INFORMATION_SCHEMA.EVENTS ORDER BY EVENT_SCHEMA, EVENT_NAME;
 EVENT_CATALOG	EVENT_SCHEMA	EVENT_NAME	DEFINER	EVENT_BODY	EVENT_DEFINITION	EVENT_TYPE	EXECUTE_AT	INTERVAL_VALUE	INTERVAL_FIELD	STATUS	ON_COMPLETION	EVENT_COMMENT
 NULL	events_test	one_event	root@localhost	SQL	SELECT 123	RECURRING	NULL	10	SECOND	ENABLED	NOT PRESERVE	
-NULL	events_test	two_event	ev_test@localhost	SQL	SELECT 123	RECURRING	NULL	20	SECOND	ENABLED	NOT PRESERVE	two event
 NULL	events_test	three_event	ev_test@localhost	SQL	SELECT 123	RECURRING	NULL	20	SECOND	ENABLED	PRESERVE	three event
+NULL	events_test	two_event	ev_test@localhost	SQL	SELECT 123	RECURRING	NULL	20	SECOND	ENABLED	NOT PRESERVE	two event
 NULL	events_test2	four_event	ev_test@localhost	SQL	SELECT 42	RECURRING	NULL	20	SECOND	ENABLED	NOT PRESERVE	
 DROP DATABASE events_test2;
 "We should see 3 events : one_event, two_event, three_event"
-SELECT EVENT_CATALOG, EVENT_SCHEMA, EVENT_NAME, DEFINER, EVENT_BODY, EVENT_DEFINITION, EVENT_TYPE, EXECUTE_AT, INTERVAL_VALUE, INTERVAL_FIELD, STATUS,ON_COMPLETION, EVENT_COMMENT FROM INFORMATION_SCHEMA.EVENTS;
+SELECT EVENT_CATALOG, EVENT_SCHEMA, EVENT_NAME, DEFINER, EVENT_BODY, EVENT_DEFINITION, EVENT_TYPE, EXECUTE_AT, INTERVAL_VALUE, INTERVAL_FIELD, STATUS,ON_COMPLETION, EVENT_COMMENT FROM INFORMATION_SCHEMA.EVENTS ORDER BY EVENT_SCHEMA, EVENT_NAME;
 EVENT_CATALOG	EVENT_SCHEMA	EVENT_NAME	DEFINER	EVENT_BODY	EVENT_DEFINITION	EVENT_TYPE	EXECUTE_AT	INTERVAL_VALUE	INTERVAL_FIELD	STATUS	ON_COMPLETION	EVENT_COMMENT
 NULL	events_test	one_event	root@localhost	SQL	SELECT 123	RECURRING	NULL	10	SECOND	ENABLED	NOT PRESERVE	
-NULL	events_test	two_event	ev_test@localhost	SQL	SELECT 123	RECURRING	NULL	20	SECOND	ENABLED	NOT PRESERVE	two event
 NULL	events_test	three_event	ev_test@localhost	SQL	SELECT 123	RECURRING	NULL	20	SECOND	ENABLED	PRESERVE	three event
+NULL	events_test	two_event	ev_test@localhost	SQL	SELECT 123	RECURRING	NULL	20	SECOND	ENABLED	NOT PRESERVE	two event
 CREATE DATABASE events_test2;
 USE events_test2;
 CREATE EVENT five_event ON SCHEDULE EVERY 20 SECOND DO SELECT 42;
 "Should see 4 events - one, two, three & five"
-SELECT EVENT_CATALOG, EVENT_SCHEMA, EVENT_NAME, DEFINER, EVENT_BODY, EVENT_DEFINITION, EVENT_TYPE, EXECUTE_AT, INTERVAL_VALUE, INTERVAL_FIELD, STATUS,ON_COMPLETION, EVENT_COMMENT FROM INFORMATION_SCHEMA.EVENTS;
+SELECT EVENT_CATALOG, EVENT_SCHEMA, EVENT_NAME, DEFINER, EVENT_BODY, EVENT_DEFINITION, EVENT_TYPE, EXECUTE_AT, INTERVAL_VALUE, INTERVAL_FIELD, STATUS,ON_COMPLETION, EVENT_COMMENT FROM INFORMATION_SCHEMA.EVENTS ORDER BY EVENT_SCHEMA, EVENT_NAME;
 EVENT_CATALOG	EVENT_SCHEMA	EVENT_NAME	DEFINER	EVENT_BODY	EVENT_DEFINITION	EVENT_TYPE	EXECUTE_AT	INTERVAL_VALUE	INTERVAL_FIELD	STATUS	ON_COMPLETION	EVENT_COMMENT
 NULL	events_test	one_event	root@localhost	SQL	SELECT 123	RECURRING	NULL	10	SECOND	ENABLED	NOT PRESERVE	
-NULL	events_test	two_event	ev_test@localhost	SQL	SELECT 123	RECURRING	NULL	20	SECOND	ENABLED	NOT PRESERVE	two event
 NULL	events_test	three_event	ev_test@localhost	SQL	SELECT 123	RECURRING	NULL	20	SECOND	ENABLED	PRESERVE	three event
+NULL	events_test	two_event	ev_test@localhost	SQL	SELECT 123	RECURRING	NULL	20	SECOND	ENABLED	NOT PRESERVE	two event
 NULL	events_test2	five_event	root@localhost	SQL	SELECT 42	RECURRING	NULL	20	SECOND	ENABLED	NOT PRESERVE	
 REVOKE EVENT ON events_test2.* FROM ev_test@localhost;
 USE test;
 "Should see 3 events - one, two & three"
-SELECT EVENT_CATALOG, EVENT_SCHEMA, EVENT_NAME, DEFINER, EVENT_BODY, EVENT_DEFINITION, EVENT_TYPE, EXECUTE_AT, INTERVAL_VALUE, INTERVAL_FIELD, STATUS,ON_COMPLETION, EVENT_COMMENT FROM INFORMATION_SCHEMA.EVENTS;
+SELECT EVENT_CATALOG, EVENT_SCHEMA, EVENT_NAME, DEFINER, EVENT_BODY, EVENT_DEFINITION, EVENT_TYPE, EXECUTE_AT, INTERVAL_VALUE, INTERVAL_FIELD, STATUS,ON_COMPLETION, EVENT_COMMENT FROM INFORMATION_SCHEMA.EVENTS ORDER BY EVENT_SCHEMA, EVENT_NAME;
 EVENT_CATALOG	EVENT_SCHEMA	EVENT_NAME	DEFINER	EVENT_BODY	EVENT_DEFINITION	EVENT_TYPE	EXECUTE_AT	INTERVAL_VALUE	INTERVAL_FIELD	STATUS	ON_COMPLETION	EVENT_COMMENT
 NULL	events_test	one_event	root@localhost	SQL	SELECT 123	RECURRING	NULL	10	SECOND	ENABLED	NOT PRESERVE	
-NULL	events_test	two_event	ev_test@localhost	SQL	SELECT 123	RECURRING	NULL	20	SECOND	ENABLED	NOT PRESERVE	two event
 NULL	events_test	three_event	ev_test@localhost	SQL	SELECT 123	RECURRING	NULL	20	SECOND	ENABLED	PRESERVE	three event
+NULL	events_test	two_event	ev_test@localhost	SQL	SELECT 123	RECURRING	NULL	20	SECOND	ENABLED	NOT PRESERVE	two event
 "Let's test ALTER EVENT which changes the definer"
 USE events_test;
 ALTER EVENT one_event ON SCHEDULE EVERY 10 SECOND;
@@ -111,10 +111,10 @@ ALTER EVENT one_event COMMENT "new comment";
 "test DROP by another user"
 DROP EVENT one_event;
 "One event should not be there"
-SELECT EVENT_CATALOG, EVENT_SCHEMA, EVENT_NAME, DEFINER, EVENT_BODY, EVENT_DEFINITION, EVENT_TYPE, EXECUTE_AT, INTERVAL_VALUE, INTERVAL_FIELD, STATUS,ON_COMPLETION, EVENT_COMMENT FROM INFORMATION_SCHEMA.EVENTS;
+SELECT EVENT_CATALOG, EVENT_SCHEMA, EVENT_NAME, DEFINER, EVENT_BODY, EVENT_DEFINITION, EVENT_TYPE, EXECUTE_AT, INTERVAL_VALUE, INTERVAL_FIELD, STATUS,ON_COMPLETION, EVENT_COMMENT FROM INFORMATION_SCHEMA.EVENTS ORDER BY EVENT_SCHEMA, EVENT_NAME;
 EVENT_CATALOG	EVENT_SCHEMA	EVENT_NAME	DEFINER	EVENT_BODY	EVENT_DEFINITION	EVENT_TYPE	EXECUTE_AT	INTERVAL_VALUE	INTERVAL_FIELD	STATUS	ON_COMPLETION	EVENT_COMMENT
-NULL	events_test	two_event	ev_test@localhost	SQL	SELECT 123	RECURRING	NULL	20	SECOND	ENABLED	NOT PRESERVE	two event
 NULL	events_test	three_event	ev_test@localhost	SQL	SELECT 123	RECURRING	NULL	20	SECOND	ENABLED	PRESERVE	three event
+NULL	events_test	two_event	ev_test@localhost	SQL	SELECT 123	RECURRING	NULL	20	SECOND	ENABLED	NOT PRESERVE	two event
 NULL	events_test2	five_event	root@localhost	SQL	SELECT 42	RECURRING	NULL	20	SECOND	ENABLED	NOT PRESERVE	
 DROP USER ev_test@localhost;
 DROP DATABASE events_test2;
diff --git a/mysql-test/r/kill.result b/mysql-test/r/kill.result
index b78c677fb02..1795457220b 100644
--- a/mysql-test/r/kill.result
+++ b/mysql-test/r/kill.result
@@ -16,7 +16,7 @@ select 4;
 4
 drop table t1;
 kill (select count(*) from mysql.user);
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'select count(*) from mysql.user)' at line 1
+ERROR 42000: This version of MySQL doesn't yet support 'Usage of subqueries or stored function calls as part of this statement'
 create table t1 (id int primary key);
 create table t2 (id int unsigned not null);
 insert into t2 select id from t1;