The following test case:
create table value_nodes (v char(4));
|
create table module_nodes(m char(4));
|
create table module_arguments(m char(4), v char(4));
|
create table module_results(m char(4), v char(4));
|
|
with recursive
|
reached_values as
|
(
|
select v from value_nodes where v in ('v3','v7','v9')
|
union
|
select module_results.v from module_results, applied_modules
|
where module_results.m = applied_modules.m
|
),
|
applied_modules as
|
(
|
select module_nodes.m
|
from
|
module_nodes
|
left join
|
(
|
module_arguments
|
left join
|
reached_values
|
on module_arguments.v = reached_values.v
|
)
|
on reached_values.v is null and
|
module_nodes.m = module_arguments.m
|
where module_arguments.m is null
|
)
|
select * from reached_values;
|
causes a crash of the server after reporting the error:
ERROR 4008 (HY000): Restrictions imposed on recursive definitions are violated for table 'applied_modules'.
|
This can be seen in debugger.
The debugger reports:
Thread 33 "mysqld" received signal SIGSEGV, Segmentation fault.
|
[Switching to Thread 0x7ffff426c300 (LWP 15272)]
|
0x00000000006ca3f0 in mysql_derived_prepare (thd=0x7fff80000b00, lex=0x7fff80004518, derived=0x7fff80013698) at /home/igor/maria-git/10.2/sql/sql_derived.cc:794
|
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The fix for this bug was pushed into the 10.2 tree.