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mserver5: gdk_bat.c:2855: BATassertHeadProps: Assertion `!b->H->revsorted || cmp >= 0' failed. #3562

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

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

Date: 2014-09-05 13:12:15 +0200
From: Martin van Dinther <<martin.van.dinther>>
To: SQL devs <>
Version: 11.17.21 (Jan2014-SP3)

Last updated: 2014-10-31 14:13:54 +0100

Comment 20137

Date: 2014-09-05 13:12:15 +0200
From: Martin van Dinther <<martin.van.dinther>>

User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Firefox/31.0
Build Identifier:

Assertion failure in gdk_bat.c

Reproducible: Always

Steps to Reproduce:

1.compile MonetDB sources with --enable-assert
2. start mserver5
3. start mclient and enter following SQL:

sql>CREATE TABLE FLOAT8_TBL(f1 double);
operation successful (77.854ms)

sql>INSERT INTO FLOAT8_TBL(f1) VALUES ('1.2345678901234e+200');
1 affected rows (2.131ms)

sql>INSERT INTO FLOAT8_TBL(f1) VALUES ('1.2345678901234e-200');
1 affected rows (2.014ms)

sql>SELECT * FROM FLOAT8_TBL f;
+--------------------------+
| f1 |
+==========================+
| 1.2345678901234e+200 |
| 1.2345678901234e-200 |
+--------------------------+
2 tuples (0.992ms)

sql>SELECT f.f1, round(f.f1, 0) AS round_f1 FROM FLOAT8_TBL f;
+--------------------------+--------------------------+
| f1 | round_f1 |
+==========================+==========================+
| 1.2345678901234e+200 | 1.2345678901234e+200 |
| 1.2345678901234e-200 | 0 |
+--------------------------+--------------------------+
2 tuples (1.222ms)

sql>INSERT INTO FLOAT8_TBL(f1) VALUES ('1.2345678901234e+200');
1 affected rows (2.354ms)

sql>SELECT f.f1, round(f.f1, 0) AS round_f1 FROM FLOAT8_TBL f;
now the server stopped due to assertion failure

Actual Results:

builtin opt gdk_dbpath = /ufs/dinther/MonetDB201408/var/monetdb5/dbfarm/demo
builtin opt gdk_debug = 0
builtin opt gdk_vmtrim = no
builtin opt monet_prompt = >
builtin opt monet_daemon = no
builtin opt mapi_port = 50000
builtin opt mapi_open = false
builtin opt mapi_autosense = false
builtin opt sql_optimizer = default_pipe
builtin opt sql_debug = 0
MonetDB 5 server v11.17.21 "Jan2014-SP3"
Serving database 'demo', using 8 threads
Compiled for x86_64-unknown-linux-gnu/64bit with 64bit OIDs dynamically linked
Found 15.356 GiB available main-memory.
Copyright (c) 1993-July 2008 CWI.
Copyright (c) August 2008-2014 MonetDB B.V., all rights reserved
Visit http://www.monetdb.org/ for further information
Listening for connection requests on mapi:monetdb://127.0.0.1:50000/
MonetDB/GIS module loaded
MonetDB/JAQL module loaded
MonetDB/SQL module loaded

Bulk operator required for str.stringleft
Bulk operator required for str.stringleft
mserver5: gdk_bat.c:2855: BATassertHeadProps: Assertion `!b->H->revsorted || cmp >= 0' failed.
./start_mserver5.sh: line 4: 27262 Aborted ./MonetDB201408/bin/mserver5 -d10
bash-4.2$

Welcome to mclient, the MonetDB/SQL interactive terminal (unreleased)
Database: MonetDB v11.17.21 (Jan2014-SP3), 'demo'
Type \q to quit, ? for a list of available commands
auto commit mode: on
sql>CREATE TABLE FLOAT8_TBL(f1 double);
operation successful (77.854ms)
sql>INSERT INTO FLOAT8_TBL(f1) VALUES ('1.2345678901234e+200');
1 affected rows (2.131ms)
sql>INSERT INTO FLOAT8_TBL(f1) VALUES ('1.2345678901234e-200');
1 affected rows (2.014ms)
sql>SELECT * FROM FLOAT8_TBL f;
+--------------------------+
| f1 |
+==========================+
| 1.2345678901234e+200 |
| 1.2345678901234e-200 |
+--------------------------+
2 tuples (0.992ms)
sql>SELECT f.f1, round(f.f1, 0) AS round_f1 FROM FLOAT8_TBL f;
+--------------------------+--------------------------+
| f1 | round_f1 |
+==========================+==========================+
| 1.2345678901234e+200 | 1.2345678901234e+200 |
| 1.2345678901234e-200 | 0 |
+--------------------------+--------------------------+
2 tuples (1.222ms)
sql>INSERT INTO FLOAT8_TBL(f1) VALUES ('1.2345678901234e+200');
1 affected rows (2.354ms)
sql>SELECT f.f1, round(f.f1, 0) AS round_f1 FROM FLOAT8_TBL f;
sql>
bash-4.2$

Expected Results:

no assertion failure

Also happens with mserver5 compiled from default branch sources.
Gives: mserver5: /ufs/dinther/dev/dev/gdk/gdk_bat.c:2912: BATassertHeadProps: Assertion `!b->H->revsorted || cmp >= 0' failed.

See also bug #3542

Comment 20143

Date: 2014-09-08 17:10:29 +0200
From: MonetDB Mercurial Repository <>

Changeset 546a6cc20772 made by Sjoerd Mullender sjoerd@acm.org in the MonetDB repo, refers to this bug.

For complete details, see http//devmonetdborg/hg/MonetDB?cmd=changeset;node=546a6cc20772

Changeset description:

Fix bug #3562 + added test.
You also need to set the revsorted property!

Comment 20344

Date: 2014-10-31 14:13:54 +0100
From: @sjoerdmullender

Oct2014 has been released.

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