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The last comment is the same kind of query (and hence problem?) as reported in bug #6121 !??
Comment 24696
Date: 2016-11-17 12:40:00 +0100
From: Martin van Dinther <<martin.van.dinther>>
in default branch (MonetDB 5 server v11.26.0) I get assertion (on mserver5 console):
could not find t.b
L4.L3
mserver5: ../../../dev/monetdb5/optimizer/opt_garbageCollector.c:104: OPTgarbageCollectorImplementation: Assertion `p->token == ENDsymbol' failed.
in Dec2016 branch (MonetDB 5 server v11.25.0) I get assertion (on mserver5 console):
could not find t.b
L4.L3
mserver5: ../../../../dev/sql/backends/monet5/rel_bin.c:2402: rel2bin_project: Assertion `0' failed.
in Jun2016 branch (MonetDB 5 server v11.23.14) I get assertion (on mserver5 console):
could not find t.b
L2.L1
mserver5: ../../../../dev/sql/backends/monet5/rel_bin.c:2391: rel2bin_project: Assertion `0' failed.
Date: 2016-11-10 16:19:27 +0100
From: Dean De Leo <>
To: SQL devs <>
Version: -- development
CC: martin.van.dinther, @mlkersten, @njnes, @drstmane
Last updated: 2016-12-21 13:07:09 +0100
Comment 24679
Date: 2016-11-10 16:19:27 +0100
From: Dean De Leo <>
User-Agent: Mozilla/5.0 (X11; Fedora; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.90 Safari/537.36
Build Identifier:
An assertion in the code is hit with a complex query somewhere in the MAL optimiser. As consequence the DBMS aborts its execution.
On Linux, tip of the default branch, debug build, empty tables, schema attached.
Reproducible: Always
Steps to Reproduce:
Actual Results:
The server hits an assertion in the code and aborts, see the attached backtrace.
Comment 24680
Date: 2016-11-10 16:19:58 +0100
From: Dean De Leo <>
Created attachment 503
schema.sql
Comment 24681
Date: 2016-11-10 16:20:21 +0100
From: Dean De Leo <>
Created attachment 504
query5.sql
Comment 24682
Date: 2016-11-10 16:20:43 +0100
From: Dean De Leo <>
Created attachment 505
backtrace.txt
Comment 24694
Date: 2016-11-16 18:00:46 +0100
From: Dean De Leo <>
Simpler repro (or related crash):
Comment 24695
Date: 2016-11-16 18:05:39 +0100
From: @drstmane
The last comment is the same kind of query (and hence problem?) as reported in bug #6121 !??
Comment 24696
Date: 2016-11-17 12:40:00 +0100
From: Martin van Dinther <<martin.van.dinther>>
in default branch (MonetDB 5 server v11.26.0) I get assertion (on mserver5 console):
could not find t.b
L4.L3
mserver5: ../../../dev/monetdb5/optimizer/opt_garbageCollector.c:104: OPTgarbageCollectorImplementation: Assertion `p->token == ENDsymbol' failed.
in Dec2016 branch (MonetDB 5 server v11.25.0) I get assertion (on mserver5 console):
could not find t.b
L4.L3
mserver5: ../../../../dev/sql/backends/monet5/rel_bin.c:2402: rel2bin_project: Assertion `0' failed.
in Jun2016 branch (MonetDB 5 server v11.23.14) I get assertion (on mserver5 console):
could not find t.b
L2.L1
mserver5: ../../../../dev/sql/backends/monet5/rel_bin.c:2391: rel2bin_project: Assertion `0' failed.
Comment 24719
Date: 2016-11-24 18:27:47 +0100
From: MonetDB Mercurial Repository <>
Changeset b8c955e61def made by Martin van Dinther martin.van.dinther@monetdbsolutions.com in the MonetDB repo, refers to this bug.
For complete details, see http//devmonetdborg/hg/MonetDB?cmd=changeset;node=b8c955e61def
Changeset description:
Comment 24755
Date: 2016-12-03 15:03:04 +0100
From: @njnes
very hard problem in the apply handling (ie nested subqueries). Fixed by reimplementation of apply
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