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Fixed on the april2012 branch. The assertion doesn't appear anymore as the project/groupby now properly keep the cardinality (ie starting low (atom/aggr) and increased on multi row/columns)
The text was updated successfully, but these errors were encountered:
Date: 2012-05-23 18:48:16 +0200
From: Babis <>
To: SQL devs <>
Version: -- development
CC: @njnes, @drstmane
Last updated: 2012-06-19 11:20:20 +0200
Comment 17277
Date: 2012-05-23 18:48:16 +0200
From: Babis <>
User-Agent: Opera/9.80 (X11; Linux x86_64; U; en) Presto/2.9.168 Version/11.52
Build Identifier: Jul2012
mclient terminates its connection to mserver5 when executing a valid SQL query such as the above:
SELECT 1, (SELECT count(*) FROM R);
Notice that a query similar to the above that swaps the projected attributes executes correctly:
SELECT (SELECT count(*) FROM R), 1;
Reproducible: Always
Steps to Reproduce:
Actual Results:
sql>SELECT 1, (SELECT count() FROM R);
MAPI = (monetdb) /tmp/.s.monetdb.50000
ACTION= read_line
QUERY = SELECT 1, (SELECT count() FROM R);
ERROR = !Connection terminated
Comment 17278
Date: 2012-05-23 18:57:57 +0200
From: @drstmane
most probabaly this is actually a crash (segfault) of the server,
please check and share server console output or monetdbd (merovignian) log.
Comment 17279
Date: 2012-05-23 19:06:47 +0200
From: Babis <>
Oops, sorry, I forgot to include it:
ERR db[24300]: mserver5: ../../../MonetDB/sql/server/rel_select.c:616: rel_project: Assertion `exps_card(rel->exps) <= rel->card' failed.
MSG merovingian[9336]: database 'db' (24300) was killed by signal SIGABRT
Comment 17280
Date: 2012-05-23 20:01:36 +0200
From: @drstmane
It indeed fails with Apr2012 with assertions enabled,
but appears to work fine with assertions disabled.
We'll need to check the validity of the asssertion ...
Comment 17291
Date: 2012-05-25 21:51:53 +0200
From: @njnes
Changeset 4acfcc5693ca made by Niels Nes niels@cwi.nl in the MonetDB repo, refers to this bug.
For complete details, see http//devmonetdborg/hg/MonetDB?cmd=changeset;node=4acfcc5693ca
Changeset description:
Comment 17292
Date: 2012-05-25 21:53:49 +0200
From: @njnes
Fixed on the april2012 branch. The assertion doesn't appear anymore as the project/groupby now properly keep the cardinality (ie starting low (atom/aggr) and increased on multi row/columns)
The text was updated successfully, but these errors were encountered: