Hello,
I am trying to make a small function for creating some
persistent bats.
Could you point me to my (probably stupid) error?
Many thanks
Kambiz
$ mclient --language=mal -d demo
mal>
mal>function init_schema():void;
mal>
mal>bbp.bind("schema_version");
mal>
mal># create schema,
Hello,
sorry for this OT question.
I was reading the literature relevant to what I would
like to do and found the papers of H. Steenhagen.
A thesis is referenced very often which I could order
a dead-tree copy of. But that would probably take very
long:
Title: Optimization of object query lan
[EMAIL PROTECTED] wrote:
> For example, is it legal to do this:
>
> $ mclient -l mal -d demo -H
> mal>include sql;
> mal>sql.start();
> mal>bat1 := sql.bind("sys","_tables","id",1);
>
> The last statement hangs the client.
>
As I expected, it was a dumb newbie mistake:
I used sql.start() in
[EMAIL PROTECTED] wrote:
> The discussion thread indicates a need for some advice.
A nice euphemism for me being clueless :-)
> Either, your solution works on top of SQL or it
> works directly on MAL. Don't ever attempt to be a
> man in the middle, e.g. exploiting the implementation
> scheme de
[EMAIL PROTECTED] wrote:
> Well embedded_mal could still load the sql module and then extra
> threads maybe created. Its more a warning, sql should be the one
> making changes to the catalog. If you think of you application/extention
> as do some sql to create tables, then exit sql, do querying w
Hello Niels,
> Indeed, but when sql is running its in control of the sql_catalog bat (through
> the gdk_logger code). This means it assumes its the only one accessint it.
Can I circumvent that with an embedded server which I start with
a call to embedded_mal() ?
Kambiz
[EMAIL PROTECTED] wrote:
> [EMAIL PROTECTED] wrote:
> > Hello,
> >
> > how is it possible to access in a MAL client session (mclient -l mal)
> > the BATs of tables which were created previously in sql?
> >
> You can't, because the mapping of SQL to BATs is maintained in the SQL
> private catal
[EMAIL PROTECTED] wrote:
> > > Further, a simple
> > > mclient -l mal --help
> > > (with a running mserver5) will reveal whether readline support (and hence
> > > \h) is indeed enabled in your build of MonetDB.
> >
> > Do you mean 'mclient -l mal -H' ?
>
> nope. I meant what I wrote: `mclient
> Can you retrieve the installed readline version using Ubuntu's package
> manager somehow? Also whether you are using GNU readline, or BSD's
> libedit?
$ ldd /opt/monetdb/bin/MapiClient
...
libreadline.so.5 => /lib/libreadline.so.5 (0xb7f6a000)
...
which is a link to /l
> which version of MonetDB are you using, and how did you install it --- if I
> recall correctly from previous mails, you did install using the
> monetdb_install.sh script, right, and hence use the super source tarball?
> But which version?
MonetDB-Mars-SuperBall-SR3.tar.bz2. I have the impression
Hello,
> > Why the option
> > \h - show the readline history
> >
> > mclient.exe -lsql --help
> >
> > Is not available on windows? Is an design feature or a bug?
>
> There is no readline on Windows, nor a need for it.
is \h supposed to work on Linux (Ubuntu feisty)?
I get:
$ mclient -l
Sorry, I had sent out this mail, before I received Martin's
mail with the clarifying information:
> If you would have packaged both instructions in a function, it would
> work as expected,
> because io.print can handle any BAT thanks for being a 'pattern'
Thank you
Kambiz
- Original Messag
> A more informative error mesage might help --- from a user's point of view,
> variable 'b' has been initialized before it is used.
I would second that.
> In fact, the above
> b:bat[:int,:int] := bbp.bind("test");
> is wrong --- or at least implies a silent cast from :oid to :int of the
>
> b) or there must be a way of storing the type information in other BATs
Did I already apologise for my dumb questions? :-)
I found bbp.getNames, getHeadType, getTailType and I think I see how
I could extract the necessary information with them.
However, the question remains as how to create a
Hello Martin,
> >> However, I have found one solution to my problem; if I type the left
> >> hand side, everything works:
> >>
> >> mal>b:bat[:int,:int] := bbp.bind("test");
> >>
> yes that is necessary. In general the type of the bind can not be known.
> and MAL requires strongly typed inst
Haha!
that was a good joke:
> > [EMAIL PROTECTED] mserver5 --version
> > MonetDB Server v5.0.0
> > Copyright (c) 1993-2007 CWI, all rights reserved
> > Compiled by: [EMAIL PROTECTED]
> > Compilation: gcc -O2 -std=c99 -O6 -fomit-frame-pointer
> >-finline-functions -falign
I found a log file which is apparently created by monetdb-install.sh:
called with arguments: --build=/opt/monetdb/src --prefix=/opt/monetdb
--enable-sql --enable-xquery --enable-debug
So, is --enable-optimise the default?
- Original Message -
From: [EMAIL PROTECTED]
To: monetdb-develope
Fabian,
thank you. I seem to remember that I didn't use --enable-optimise as it
was advertised to take longer than the normal build.
However, I have found one solution to my problem; if I type the left
hand side, everything works:
mal>b:bat[:int,:int] := bbp.bind("test");
mal>io.print(b);
#
Message -
> From: "Niels Nes"
> To: [EMAIL PROTECTED]
> Cc: monetdb-developers@lists.sourceforge.net
> Sent: Donnerstag, 11. Oktober 2007 9.38 Uhr (GMT+0100) Europe/Berlin
> Subject: Re: [Monetdb-developers] Simple bat operations
>
> On Thu, Oct 11, 2007 at 08:0
]
Cc: monetdb-developers@lists.sourceforge.net
Sent: Donnerstag, 11. Oktober 2007 9.38 Uhr (GMT+0100) Europe/Berlin
Subject: Re: [Monetdb-developers] Simple bat operations
On Thu, Oct 11, 2007 at 08:00:36AM +0200, darabi... wrote:
> Hello,
>
> sorry for asking so many dumb questions, b
iginal Message -
From: "Niels Nes"
To: [EMAIL PROTECTED]
Cc: monetdb-developers@lists.sourceforge.net
Sent: Donnerstag, 11. Oktober 2007 9.38 Uhr (GMT+0100) Europe/Berlin
Subject: Re: [Monetdb-developers] Simple bat operations
On Thu, Oct 11, 2007 at 08:00:36AM +0200, darabi... wrote
Hello,
sorry for asking so many dumb questions, but I don't seem
to be able to find the answers in the docs.
I try to create and persist a bat:
(mclient -d demo -l mal)
n := bat.new(:oid,:str);
bat.setName(n, "person_name");
bat.setPersistent(n, true);
bat.append(n, "John", true);
bat.append(n
Hello,
sorry for asking so many dumb questions, but I don't seem
to be able to find the answers in the docs.
I try to create and persist a bat:
(mclient -d demo -l mal)
n := bat.new(:oid,:str);
bat.setName(n, "person_name");
bat.setPersistent(n, true);
bat.append(n, "John", true);
bat.append(n
OK. Is there a way of seeing what MAL gets executed, when a
statement is issued? By modifying the log level or sth. like that?
Thanks
Kambiz
- Original Message -
From: "Martin Kersten" <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Cc: monetdb-developers@lists.sourceforge.net
Sent: Mittwoch,
Hello,
how is it possible to access in a MAL client session (mclient -l mal)
the BATs of tables which were created previously in sql?
I have tried different versions of bat.new, and bbp.bind. I tried
different naming schemes (e.g. "tablename_columnname" which was
mentioned somewhere in the docs),
goal? Is there any road block?
>
There are (have been) attempts to hook up Hibernate and MonetDB. I don't
know their status.
If ultra-high performance is your target, I question if a DBMS is the
right way to go. However,
I also think that most o-o application
d block?
Thank you very much for your help.
Kambiz Darabi
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