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MDEV-13020 Server crashes in Item_func_nextval::val_int...

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The problem was that we didn't check on open of sequence if the table is a view, which is not allowed.
We are now generating a proper error message for this case.
This commit is contained in:
Monty
2017-07-06 10:59:45 +03:00
parent 58dd72f18c
commit 3f32743294
3 changed files with 62 additions and 3 deletions
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26
mysql-test/suite/sql_sequence/view.result Normal file
View File

@ -0,0 +1,26 @@
create sequence s1;
create view v1 as select * from s1;
create view v2 as select next value for s1;
select * from v1;
next_not_cached_value minimum_value maximum_value start_value increment cache_size cycle_option cycle_count
1 1 9223372036854775806 1 1 1000 0 0
select * from v2;
next value for s1
1
select * from v2;
next value for s1
2
select next value for v1;
ERROR 42S02: 'test.v1' is not a SEQUENCE
drop sequence s1;
drop view v1,v2;
#
# MDEV 13020 Server crashes in Item_func_nextval::val_int upon
# selecting NEXT or PREVIOUS VALUE for a view
#
CREATE OR REPLACE VIEW v1 AS SELECT 1 AS f;
SELECT NEXT VALUE FOR v1;
ERROR 42S02: 'test.v1' is not a SEQUENCE
SELECT PREVIOUS VALUE FOR v1;
ERROR 42S02: 'test.v1' is not a SEQUENCE
drop view v1;

29
mysql-test/suite/sql_sequence/view.test Normal file
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@ -0,0 +1,29 @@
--source include/have_sequence.inc
--source include/have_innodb.inc
#
# Test sequences with views
#
create sequence s1;
create view v1 as select * from s1;
create view v2 as select next value for s1;
select * from v1;
select * from v2;
select * from v2;
--error ER_NOT_SEQUENCE
select next value for v1;
drop sequence s1;
drop view v1,v2;
--echo #
--echo # MDEV 13020 Server crashes in Item_func_nextval::val_int upon
--echo # selecting NEXT or PREVIOUS VALUE for a view
--echo #
CREATE OR REPLACE VIEW v1 AS SELECT 1 AS f;
--error ER_NOT_SEQUENCE
SELECT NEXT VALUE FOR v1;
--error ER_NOT_SEQUENCE
SELECT PREVIOUS VALUE FOR v1;
drop view v1;

6
sql/sql_base.cc
View File

@ -1783,7 +1783,11 @@ retry_share:
my_error(ER_WRONG_MRG_TABLE, MYF(0));
goto err_lock;
}
if (table_list->sequence)
{
my_error(ER_NOT_SEQUENCE, MYF(0), table_list->db, table_list->alias);
goto err_lock;
}
/*
This table is a view. Validate its metadata version: in particular,
that it was a view when the statement was prepared.