Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Assertion error in rel_dce_refs (sqlsmith) #6449

monetdb-team opened this issue Nov 30, 2020 · 0 comments

Assertion error in rel_dce_refs (sqlsmith) #6449

monetdb-team opened this issue Nov 30, 2020 · 0 comments


Copy link

@monetdb-team monetdb-team commented Nov 30, 2020

Date: 2017-10-24 21:58:11 +0200
From: @mlkersten
To: SQL devs <>
Version: 11.27.5 (Jul2017-SP1)
CC: @njnes

Last updated: 2017-12-14 14:46:06 +0100

Comment 25795

Date: 2017-10-24 21:58:11 +0200
From: @mlkersten

User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:55.0) Gecko/20100101 Firefox/55.0
Build Identifier:

SF1 database triggers assertion.
0 0x00007f0d8e9a469b in raise () from /lib64/
1 0x00007f0d8e9a64a0 in abort () from /lib64/
2 0x00007f0d8e99cd5a in __assert_fail_base () from /lib64/
3 0x00007f0d8e99cdd2 in __assert_fail () from /lib64/
4 0x00007f0d894e8779 in rel_dce_refs (sql=0x7f0d58101750, rel=0x7f0d581287b0)
at /export/scratch1/home/mk/default//package/sql/server/rel_optimizer.c:6158
5 0x00007f0d894e86d1 in rel_dce_refs (sql=0x7f0d58101750, rel=0x7f0d58128230)
at /export/scratch1/home/mk/default//package/sql/server/rel_optimizer.c:6126
6 0x00007f0d894e8754 in rel_dce_refs (sql=0x7f0d58101750, rel=0x7f0d58128680)
at /export/scratch1/home/mk/default//package/sql/server/rel_optimizer.c:6154
7 0x00007f0d894e86d1 in rel_dce_refs (sql=0x7f0d58101750, rel=0x7f0d58124330)
at /export/scratch1/home/mk/default//package/sql/server/rel_optimizer.c:6126
8 0x00007f0d894e86d1 in rel_dce_refs (sql=0x7f0d58101750, rel=0x7f0d58124cf0)
at /export/scratch1/home/mk/default//package/sql/server/rel_optimizer.c:6126
9 0x00007f0d894e8f37 in rel_dce (sql=0x7f0d58101750, rel=0x7f0d58124cf0)
at /export/scratch1/home/mk/default//package/sql/server/rel_optimizer.c:6352
10 0x00007f0d894f4b41 in _rel_optimizer (sql=0x7f0d58101750, rel=0x7f0d58124cf0, g_changes=0x7f0d6ea9b940, level=0)
at /export/scratch1/home/mk/default//package/sql/server/rel_optimizer.c:9027
11 0x00007f0d894f4ce1 in rel_optimizer (sql=0x7f0d58101750, rel=0x7f0d58124cf0)
at /export/scratch1/home/mk/default//package/sql/server/rel_optimizer.c:9054
12 0x00007f0d893ce855 in sql_symbol2relation (c=0x7f0d58101750, sym=0x7f0d5811aab0)
at /export/scratch1/home/mk/default//package/sql/backends/monet5/sql.c:121
13 0x00007f0d893ee008 in SQLparser

Reproducible: Always

Steps to Reproduce:

select as c0,
ref_4.index_type_name as c1, as c2,
ref_3.value as c3
sys.environment as ref_3
inner join sys.index_types as ref_4
on (ref_3.value is NULL)
where EXISTS (
ref_3.value as c0
ref_5.table_id as c0,
ref_5.table_id as c1, as c2,
ref_4.index_type_name as c3,
ref_4.index_type_id as c4
tmp._columns as ref_5
left join bam.rg as ref_6
on ( is not NULL)
where false
limit 97) as subq_0
where true)
limit 136;

Comment 25818

Date: 2017-10-29 10:39:06 +0100
From: @njnes

fixed by handling the topn/sample in the apply rewriters

Comment 25819

Date: 2017-10-29 10:39:24 +0100
From: MonetDB Mercurial Repository <>

Changeset 7d28d093c817 made by Niels Nes in the MonetDB repo, refers to this bug.

For complete details, see https//devmonetdborg/hg/MonetDB?cmd=changeset;node=7d28d093c817

Changeset description:

fixed bug #6449

Comment 25820

Date: 2017-10-29 11:41:15 +0100
From: MonetDB Mercurial Repository <>

Changeset 751f31299c66 made by Niels Nes in the MonetDB repo, refers to this bug.

For complete details, see https//devmonetdborg/hg/MonetDB?cmd=changeset;node=751f31299c66

Changeset description:

add test for bug #6449
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
None yet
Linked pull requests

Successfully merging a pull request may close this issue.

None yet
1 participant