Re: b and g must be aligned

14 Aug 2013


      Oh, that explains it. Although the resultset is only 50k, the initial 
table is much larger. Thanks.


On 08/14/2013 05:52 PM, Niels Nes wrote:
...
On Wed, Aug 14, 2013 at 05:32:02PM +0100, Miguel Ping wrote:
...
I renamed the module definition in udf.mal:
module batudf;
TO
module aggr;
reinstalled, and it did the trick.
I still don't understand how it works with a fresh table. I'm
guessing there's some history feeding the mal planner (queryhistory
or callhistory steps?).
mitosis (ie horizontal partitioning) only works for tables with atleast
100k tuples.
Scott, did you do any tests to check the difference beween iterative
and non-iterative versions? And finally, can you share the patch you
mention? I'm interested in applying the patch if it's much faster
than the "regular" version.
Niels
Thanks
--
Miguel
On 08/14/2013 03:55 PM, Niels Nes wrote:
...
Miguel
As pointed out by scott, the easiest fix is to put your aggregation
function (as we expect) into the aggr mal namespace.
Then mitosis won't trigger for queries with your aggregation, but
other queries still get mitosis/mergetable.
The complex solution is to add your case (2 step aggregation) into
the mergetable code (and fix mitosis that it doesn't bail out on your
aggregation).
Niels
On Wed, Aug 14, 2013 at 03:20:06PM +0100, Miguel Ping wrote:
...
Here:
*without* mitosis
+------------------------------------------------------------------------------------------------+
| mal |
+================================================================================================+
| function user.s13_1{autoCommit=true}(A0:lng,A1:lng):void; |
|     X_27 := nil:bat[:oid,:lng]; |
|     X_39:bat[:oid,:str]  := nil:bat[:oid,:str]; |
| barrier X_68 := language.dataflow(); |
|     X_4 := sql.mvc(); |
|     X_8 := sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","ts",0); |
|     X_5:bat[:oid,:oid]  :=
sql.tid(X_4,"wa_sapo_pt_audience","kpi_2013_07"); |
|     X_65 := algebra.subselect(X_8,X_5,A0,A1,true,true,false); |
|     (X_11,r1_11) :=
sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","ts",2); |
|     X_66 := algebra.subselect(r1_11,A0,A1,true,true,false); |
|     X_14 := sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","ts",1); |
|     X_67 := algebra.subselect(X_14,X_5,A0,A1,true,true,false); |
|     X_16 := sql.subdelta(X_65,X_5,X_11,X_66,X_67); |
|     X_18 :=
sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","ts_day",0); |
|     (X_20,r1_26) :=
sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","ts_day",2); |
|     X_22 :=
sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","ts_day",1); |
|     X_23 := sql.projectdelta(X_16,X_18,X_20,r1_26,X_22); |
|     (X_24,r1_34,r2_34) := group.subgroupdone(X_23); |
|     X_27 := algebra.leftfetchjoin(r1_34,X_23); |
|     X_29 := sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","h_visitors_register",0);
|
|     (X_33,r1_49) := sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","h_visitors_register",2);
|
|     X_36 := sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","h_visitors_register",1);
|
|     X_38 := sql.projectdelta(X_16,X_29,X_33,r1_49,X_36); |
|     X_39:bat[:oid,:str]  := batudf.subhllagg(X_38,X_24,r1_34,true); |
| language.pass(X_5); |
| language.pass(X_23); |
| language.pass(X_16); |
| language.pass(r1_34); |
| exit X_68; |
|     X_42 := sql.resultSet(2,1,X_27); |
| sql.rsColumn(X_42,"wa_sapo_pt_audience.kpi_2013_07","ts_day","bigint",64,0,X_27);
|
| sql.rsColumn(X_42,"wa_sapo_pt_audience.kpi_2013_07","L1","clob",1881,0,X_39);
|
|     X_51 := io.stdout(); |
| sql.exportResult(X_51,X_42); |
| end s13_1; |
+------------------------------------------------------------------------------------------------+
*with mitosis*
+-------------------------------------------------------------------------------------------------------------------------------------+
| mal |
+=====================================================================================================================================+
| function user.s14_1{autoCommit=true}(A0:lng,A1:lng):void; |
|     X_18 := nil:bat[:oid,:lng]; |
|     X_27:bat[:oid,:str]  := nil:bat[:oid,:str]; |
| barrier X_157 := language.dataflow(); |
|     X_4 := sql.mvc(); |
|     X_63:bat[:oid,:lng]  :=
sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","ts",0,0,4); |
|     X_56:bat[:oid,:oid]  :=
sql.tid(X_4,"wa_sapo_pt_audience","kpi_2013_07",0,4); |
|     X_104 := algebra.subselect(X_63,X_56,A0,A1,true,true,false); |
|     (X_67:bat[:oid,:oid] ,X_68:bat[:oid,:lng] ) :=
sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","ts",2,0,4); |
|     X_108 := algebra.subselect(X_68,A0,A1,true,true,false); |
|     X_112 := sql.subdelta(X_104,X_56,X_67,X_108); |
|     X_75:bat[:oid,:lng]  :=
sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","ts_day",0,0,4); |
|     (X_79:bat[:oid,:oid] ,X_80:bat[:oid,:lng] ) :=
sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","ts_day",2,0,4); |
|     X_120 := sql.projectdelta(X_112,X_75,X_79,X_80); |
|     (X_124,X_125,X_126) := group.subgroupdone(X_120); |
|     X_127 := algebra.leftfetchjoin(X_125,X_120); |
|     X_64:bat[:oid,:lng]  :=
sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","ts",0,1,4); |
|     X_58:bat[:oid,:oid]  :=
sql.tid(X_4,"wa_sapo_pt_audience","kpi_2013_07",1,4); |
|     X_105 := algebra.subselect(X_64,X_58,A0,A1,true,true,false); |
|     (X_69:bat[:oid,:oid] ,X_70:bat[:oid,:lng] ) :=
sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","ts",2,1,4); |
|     X_109 := algebra.subselect(X_70,A0,A1,true,true,false); |
|     X_113 := sql.subdelta(X_105,X_58,X_69,X_109); |
|     X_76:bat[:oid,:lng]  :=
sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","ts_day",0,1,4); |
|     (X_81:bat[:oid,:oid] ,X_82:bat[:oid,:lng] ) :=
sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","ts_day",2,1,4); |
|     X_121 := sql.projectdelta(X_113,X_76,X_81,X_82); |
|     (X_128,X_129,X_130) := group.subgroupdone(X_121); |
|     X_131 := algebra.leftfetchjoin(X_129,X_121); |
|     X_65:bat[:oid,:lng]  :=
sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","ts",0,2,4); |
|     X_60:bat[:oid,:oid]  :=
sql.tid(X_4,"wa_sapo_pt_audience","kpi_2013_07",2,4); |
|     X_106 := algebra.subselect(X_65,X_60,A0,A1,true,true,false); |
|     (X_71:bat[:oid,:oid] ,X_72:bat[:oid,:lng] ) :=
sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","ts",2,2,4); |
|     X_110 := algebra.subselect(X_72,A0,A1,true,true,false); |
|     X_114 := sql.subdelta(X_106,X_60,X_71,X_110); |
|     X_77:bat[:oid,:lng]  :=
sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","ts_day",0,2,4); |
|     (X_83:bat[:oid,:oid] ,X_84:bat[:oid,:lng] ) :=
sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","ts_day",2,2,4); |
|     X_122 := sql.projectdelta(X_114,X_77,X_83,X_84); |
|     (X_132,X_133,X_134) := group.subgroupdone(X_122); |
|     X_135 := algebra.leftfetchjoin(X_133,X_122); |
|     X_66:bat[:oid,:lng]  :=
sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","ts",0,3,4); |
|     X_62:bat[:oid,:oid]  :=
sql.tid(X_4,"wa_sapo_pt_audience","kpi_2013_07",3,4); |
|     X_107 := algebra.subselect(X_66,X_62,A0,A1,true,true,false); |
|     (X_73:bat[:oid,:oid] ,X_74:bat[:oid,:lng] ) :=
sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","ts",2,3,4); |
|     X_111 := algebra.subselect(X_74,A0,A1,true,true,false); |
|     X_10 := sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","ts",1); |
|     X_53 := algebra.subselect(X_10,X_62,A0,A1,true,true,false); |
|     X_115 := sql.subdelta(X_107,X_62,X_73,X_111,X_53); |
|     X_78:bat[:oid,:lng]  :=
sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","ts_day",0,3,4); |
|     (X_85:bat[:oid,:oid] ,X_86:bat[:oid,:lng] ) :=
sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","ts_day",2,3,4); |
|     X_14 :=
sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","ts_day",1); |
|     X_123 := sql.projectdelta(X_115,X_78,X_85,X_86,X_14); |
|     (X_136,X_137,X_138) := group.subgroupdone(X_123); |
|     X_139 := algebra.leftfetchjoin(X_137,X_123); |
|     X_149 := mat.packIncrement(X_127,4); |
|     X_150 := mat.packIncrement(X_149,X_131); |
|     X_151 := mat.packIncrement(X_150,X_135); |
|     X_15 := mat.packIncrement(X_151,X_139); |
|     (X_16,r1_34,X_140) := group.subgroupdone(X_15); |
|     X_18 := algebra.leftfetchjoin(r1_34,X_15); |
|     X_89:bat[:oid,:str]  := sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","h_visitors_register",0,0,4);
|
|     (X_96:bat[:oid,:oid] ,X_97:bat[:oid,:str] ) := sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","h_visitors_register",2,0,4);
|
|     X_145 := sql.projectdelta(X_112,X_89,X_96,X_97); |
|     X_91:bat[:oid,:str]  := sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","h_visitors_register",0,1,4);
|
|     (X_98:bat[:oid,:oid] ,X_99:bat[:oid,:str] ) := sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","h_visitors_register",2,1,4);
|
|     X_146 := sql.projectdelta(X_113,X_91,X_98,X_99); |
|     X_93:bat[:oid,:str]  := sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","h_visitors_register",0,2,4);
|
|     (X_100:bat[:oid,:oid] ,X_101:bat[:oid,:str] ) := sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","h_visitors_register",2,2,4);
|
|     X_147 := sql.projectdelta(X_114,X_93,X_100,X_101); |
|     X_95:bat[:oid,:str]  := sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","h_visitors_register",0,3,4);
|
|     (X_102:bat[:oid,:oid] ,X_103:bat[:oid,:str] ) := sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","h_visitors_register",2,3,4);
|
|     X_24 := sql.bind(X_4,"wa_sapo_pt_audience","kpi_2013_07","h_visitors_register",1);
|
|     X_148 := sql.projectdelta(X_115,X_95,X_102,X_103,X_24); |
|     X_153 := mat.packIncrement(X_145,4); |
|     X_154 := mat.packIncrement(X_153,X_146); |
|     X_155 := mat.packIncrement(X_154,X_147); |
|     X_26 := mat.packIncrement(X_155,X_148); |
|     X_27:bat[:oid,:str]  := batudf.subhllagg(X_26,X_16,r1_34,true); |
| language.pass(X_56); |
| language.pass(X_120); |
| language.pass(X_58); |
| language.pass(X_121); |
| language.pass(X_60); |
| language.pass(X_122); |
| language.pass(X_62); |
| language.pass(X_123); |
| language.pass(X_15); |
| language.pass(X_112); |
| language.pass(X_113); |
| language.pass(X_114); |
| language.pass(X_115); |
| language.pass(r1_34); |
| exit X_157; |
|     X_152:bat[:oid,:lng]  := nil:bat[:oid,:lng]; |
|     X_156:bat[:oid,:str]  := nil:bat[:oid,:str]; |
|     X_30 := sql.resultSet(2,1,X_18); |
| sql.rsColumn(X_30,"wa_sapo_pt_audience.kpi_2013_07","ts_day","bigint",64,0,X_18);
|
| sql.rsColumn(X_30,"wa_sapo_pt_audience.kpi_2013_07","L1","clob",1881,0,X_27);
|
|     X_39 := io.stdout(); |
| sql.exportResult(X_39,X_30); |
| end s14_1; |
+-------------------------------------------------------------------------------------------------------------------------------------+
On 08/14/2013 02:10 PM, Niels Nes wrote:
...
On Wed, Aug 14, 2013 at 02:04:27PM +0100, Miguel Ping wrote:
...
I've been tinkering a little more, if I use either the minimal_pipe,
no_mitosis_pipe or the sequential_pipe optimizers the error no
longer occurs. I've specified the set of optimizers to use, and it
seems that the optimizer step that's problematic is the *mitosis*
step.
Where can I learn more about this optimizer? Can someone shed some light?
Could you send us the explain outputs of both with and without
mitosis/mergetable. This may give us a hint of what goes wrong.
My guess, is that the subhllagg should probably be added (recognized).
Niels
...
Thanks!
--
Miguel
On 08/13/2013 03:59 PM, Miguel Ping wrote:
> I'm trying to come up with a small sample, but it is hard.
>
> - I currently have a small dataset (~600 rows) which gives me the error.
> - BUT if I export that data onto a *new* table, the error doesn't
> happen. This makes it hard to provide a proper sample.
>
> Running explain on the same query for these two tables, the plan is
> different: the error plan seems to use the new subgroup feature for
> aggregates which was released in a recent MonetDB version (11.15.x?) .
>
> * Does monetdb keep some sort of internal table statistics that feed the
> MAL planner?
> * Can I force the query to use the 'old' aggregate function?
> * Can you guys point me to the part where the group BAT is calculated?
> my guess is that the group ids are not being calculated correctly, hence
> the difference between g->U->count and b->U->count. I'm guessing the
> culprit is around here:
>
> ...
> |     (X_16,r1_34,X_140) := group.subgroupdone(X_15);
> |     X_18 := algebra.leftfetchjoin(r1_34,X_15);
> ...
> |     X_27:bat[:oid,:str]  := batudf.subhllagg(X_26,X_16,r1_34,true);
> #r1_r4 should be the bat* gid
>
>
> I have tried the same dataset with MonetDB 11.13.7 (which had the 'old'
> aggregate definition) and the query works as expected.
> I don't want to do a downgrade since I don't even know if the data files
> are compatible.
>
> Thanks,
> Miguel
>
> On 08/13/2013 11:35 AM, Martin Kersten wrote:
>> If it is hitting before your code, then please provide
>> the smallest (SQL) test case to reproduce it locally.
>>
>> Thanks, Martin
>>
>> On 8/13/13 11:27 AM, Miguel Ping wrote:
>>> The query calls a custom aggregate function, but the error occurs before hitting my code; the code path just starts to prepare things (it's just the boilerplate to run a custom aggr function), and it hits the error while calling BATgroupaggrinit. In fact,
>>> BATgroupaggrinit is the very first thing that the BAThllaggr function calls; Also according to Sjoerd, it's a bug:
>>>
>>> "If this happens when running a SQL query, it's a bug. I don't think NULLs have anything to do with it. NULL values are stored in-line. You might want to look at b->U->count, g->U->count, b->H->seq, g->H->seq, b->H->dense, g->H->dense when the misalignment
>>> happens (either in the debugger or by using printf--but realize that count and seq are not int, so %d is not going to work). Also things like the MAL plan (prepend SQL query with EXPLAIN) and the stack trace might be useful."
>>>
>>> Thanks.
>>>
>>>
>>> On 08/13/2013 08:51 AM, Stefan Manegold wrote:
>>>> Dear Miguel,
>>>>
>>>> I am not aware of any "hllaggr()" function in the MonetDB release, so I
>>>> assume the error occurs in your code.  Not know your code at all, I'm afraid
>>>> we cannot be of much help.
>>>>
>>>> Best,
>>>> Stefan
>>>>
>>>> On Mon, Aug 12, 2013 at 06:59:33PM +0100, Miguel Ping wrote:
>>>>> Some more info:
>>>>>> SELECT count(*) FROM wa_sapo_pt_audience.kpi_2013_07 WHERE
>>>>> ts>=1373410800000 AND ts<=1374706799000;
>>>>> ==> 764314
>>>>>
>>>>>> SELECT count(distinct(ts_day)) FROM
>>>>> wa_sapo_pt_audience.kpi_2013_07 WHERE ts>=1373410800000 AND
>>>>> ts<=1374706799000;
>>>>> ==> 15
>>>>>
>>>>> it seems that b.count is the row count, while g.count is something
>>>>> like the distinct count, with 2 more values?
>>>>>
>>>>> On 08/12/2013 05:50 PM, Miguel Ping wrote:
>>>>>> Hi, I'm resurrecting this since I've been out of town and only
>>>>>> today I got a chance to investigate further. I've recompiled with
>>>>>> -O0 to prevent optimizations from "hiding" the values, and in the
>>>>>> debugger I got this:
>>>>>>
>>>>>> b->U->count    BUN             764314
>>>>>> g->U->count    BUN             17
>>>>>> b->H->seq      oid             0
>>>>>> g->H->seq      oid             0
>>>>>> b->H->dense    unsigned int    1
>>>>>> g->H->dense    unsigned int    1
>>>>>>
>>>>>>
>>>>>> The stack call is as follows:
>>>>>>
>>>>>> BAThllaggr() at udf.c
>>>>>> AGGRsubhllaggcand() at udf.c
>>>>>> AGGRsubhllagg() at udf.c
>>>>>> malCommandCall() at mal_interpreter.c
>>>>>> runMALsequence() at mal_interpreter.c
>>>>>> DFLOWworker() at mal_dataflow.c
>>>>>> start_thread() at pthread_create.c
>>>>>> clone() at clone.S
>>>>>> 0x0
>>>>>>
>>>>>> -------- Original Message --------
>>>>>> Subject:     Re: b and g must be aligned
>>>>>> Date:     Fri, 26 Jul 2013 11:34:53 +0100
>>>>>> From:     Sjoerd Mullender
>>>>>> Reply-To:     Communication channel for MonetDB users
>>>>>> 
>>>>>> To:     Communication channel for MonetDB users
>>>>>>
>>>>>>
>>>>>>
>>>>>> -----BEGIN PGP SIGNED MESSAGE-----
>>>>>> Hash: SHA1
>>>>>>
>>>>>> On 2013-07-26 12:23, Miguel Ping wrote:
>>>>>>> On 07/25/2013 01:51 PM, Sjoerd Mullender wrote: On 2013-07-25
>>>>>>> 14:04, Miguel Ping wrote:
>>>>>>>>>> Hi all,
>>>>>>>>>>
>>>>>>>>>> We're hitting this error "b and g must be aligned". I tracked
>>>>>>>>>> the src to a commit about some alignment code thing in
>>>>>>>>>> gdk_calc:
>>>>>>>>>> http://www.mail-archive.com/checkin-list@monetdb.org/msg09731.html
>>>>>>>>>>
>>>>>>>>>>
>>>>>> (Fix alignment conversion in compatibility code for grouped
>>>>>>>>>> aggregates.)
>>>>>>>>>>
>>>>>>>>>> Can you guys please explain what's the reason behind this
>>>>>>>>>> error? I can't understand by just looking to the src of
>>>>>>>>>> gdk_calc.c
>>>>>>>>>>
>>>>>>>>>> Thanks!
>>>>>>> When using grouped aggregates, the grouping bat must be aligned
>>>>>>> with the value bat.  The value bat is b and contains the values you
>>>>>>> want to aggregate.  The group bat is g and contains for each value
>>>>>>> in b the group (an oid) it belongs to.  Equal group ids means the
>>>>>>> same group. These bats must be aligned, because we need to know for
>>>>>>> each value in b to which group it belongs. Aligned means: same
>>>>>>> length, and same head column values.  The head columns must be
>>>>>>> dense (a sequence of numbers starting at some value, and each next
>>>>>>> value exactly one larger than the previous).  Dense sequences are
>>>>>>> usually not stored explicitly in MonetDB.  We only store the first
>>>>>>> value in the hseqbase field.  So the hseqbase fields of b and g
>>>>>>> must be equal.  The one exception to this is when the bats are both
>>>>>>> empty.  This last exception is the change to gdk_calc.c in that
>>>>>>> changeset.
>>>>>>>
>>>>>>> -- Sjoerd Mullender
>>>>>>>> _______________________________________________ users-list
>>>>>>>> mailinglistusers-list@monetdb.org
>>>>>>>> http://mail.monetdb.org/mailman/listinfo/users-list
>>>>>>>>
>>>>>>>>
>>>>>>> Thanks for  your explanation. I still don't understand how can
>>>>>>> there be a misalignment. I would expect MonetDB to feed my hll
>>>>>>> aggregate functions with the correct values. Can it be that I may
>>>>>>> have some NULL values and the validation is failing because of
>>>>>>> that?
>>>>>> If this happens when running a SQL query, it's a bug.
>>>>>> I don't think NULLs have anything to do with it.  NULL values are
>>>>>> stored in-line.
>>>>>> You might want to look at b->U->count, g->U->count, b->H->seq,
>>>>>> g->H->seq, b->H->dense, g->H->dense when the misalignment happens
>>>>>> (either in the debugger or by using printf--but realize that count and
>>>>>> seq are not int, so %d is not going to work).
>>>>>> Also things like the MAL plan (prepend SQL query with EXPLAIN) and the
>>>>>> stack trace might be useful.
>>>>>>
>>>>>> - -- Sjoerd Mullender
>>>>>> -----BEGIN PGP SIGNATURE-----
>>>>>> Version: GnuPG v1.4.13 (GNU/Linux)
>>>>>> Comment: Using GnuPG with Thunderbird -http://www.enigmail.net/
>>>>>>
>>>>>> iQCVAwUBUfJQyT7g04AjvIQpAQK/JAP9HCp/aFaYWv0jodfPUnSRVgFSsdjTn/VL
>>>>>> ttSsmAF+yomGMDIne2311f/D51F3/nte7Utx+01lgvArapWErhjGN1hzPSr5LQbs
>>>>>> PZ6dUfNcH8Rt2AtT3uSxfkFZy9VRDCNNXPei43IgMS2HxVZ48pnAVkNcpBbW3Gms
>>>>>> GwdvU7bSZtM=
>>>>>> =2zSg
>>>>>> -----END PGP SIGNATURE-----
>>>>>> _______________________________________________
>>>>>> users-list mailing list
>>>>>> users-list@monetdb.org
>>>>>> http://mail.monetdb.org/mailman/listinfo/users-list
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>> _______________________________________________
>>>>> users-list mailing list
>>>>> users-list@monetdb.org
>>>>> http://mail.monetdb.org/mailman/listinfo/users-list
>>> _______________________________________________
>>> users-list mailing list
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>>> http://mail.monetdb.org/mailman/listinfo/users-list
>> _______________________________________________
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>>
>>
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> http://mail.monetdb.org/mailman/listinfo/users-list
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http://mail.monetdb.org/mailman/listinfo/users-list
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Niels Nes, Centrum Wiskunde & Informatica (CWI)
Science Park 123, 1098 XG Amsterdam, The Netherlands
room L3.14,  phone ++31 20 592-4098sip:4098@sip.cwi.nl
url:http://www.cwi.nl/~niels    e-mail:Niels.Nes@cwi.nl

users-list mailing list
users-list@monetdb.org
http://mail.monetdb.org/mailman/listinfo/users-list
--
Niels Nes, Centrum Wiskunde & Informatica (CWI)
Science Park 123, 1098 XG Amsterdam, The Netherlands
room L3.14,  phone ++31 20 592-4098sip:4098@sip.cwi.nl
url:http://www.cwi.nl/~niels    e-mail:Niels.Nes@cwi.nl

users-list mailing list
users-list@monetdb.org
http://mail.monetdb.org/mailman/listinfo/users-list
--
Niels Nes, Centrum Wiskunde & Informatica (CWI)
Science Park 123, 1098 XG Amsterdam, The Netherlands
room L3.14,  phone ++31 20 592-4098     sip:4098@sip.cwi.nl
url: http://www.cwi.nl/~niels   e-mail: Niels.Nes@cwi.nl