[mysql-dde] Re: Erste technische Fragen.

  • From: "Fabricio Mota" <fabricio.oliveira@xxxxxxxxxxxxxxxx>
  • To: <mysql-dde@xxxxxxxxxxxxx>, "Peter B. Volk" <peter.benjamin.volk@xxxxxxxxxxxxxxxxx>
  • Date: Thu, 23 Mar 2006 13:24:46 -0300

Hi Lenz, Hi Peter.

Nice discussion. Very clarifying for me.



----- Original Message ----- 
From: "Lenz Grimmer" <lenz@xxxxxxxxx>
To: "Peter B. Volk" <peter.benjamin.volk@xxxxxxxxxxxxxxxxx>
Cc: <mysql-dde@xxxxxxxxxxxxx>
Sent: Thursday, March 23, 2006 12:15 PM
Subject: [mysql-dde] Re: Erste technische Fragen.

> Hash: SHA1
> Hi Peter,
> On Thu, 23 Mar 2006, Peter B. Volk wrote:
>> hier die ersten technischen Fragen (natürlich gleich in englisch):
>> 1.) Cluster Management and SQL extensions
>> We would like to extend the SQL syntax for cluster management similar to 
>> the
>> syntax already being implemented for NDB online node adding. 
>> Unfortunately I
>> haven't found a syntax tree for the SQL syntax that will be used for this
>> purpose. Since the syntax should be very similar to the syntax used for 
>> DDE
>> it would be good if we could have a preliminary syntax tree version. Is 
>> there
>> a way to get to it?
> I will try to find the specification for that. But we might actually do 
> this
> via the NDB Managementnode, not the server directly - I have to ask.
>> 2.) Extending the syntax of SQL
>> Additionally to the cluster management extensions of the SQL syntax, 
>> which we
>> would like to adapt from the NDB Cluster management, we will probably 
>> need
>> further extensions not included in the NDB extensions. Is there 
>> documentation
>> available that we can use with an easy "HOW TO" extend the SQL syntax?? 
>> We
>> would exactly need to know witch classes we need to deal with and what we
>> need to change or what we need to hack for our selves.
> Unfortunately there is no "SQL extension HOWTO" yet :)
> According to our developers, "it depends what you want to achieve". The 
> central
> file is sql_yacc.yy. Can you please elaborate on what exactly you want to 
> add
> to the syntax?
>> 3.) Foreign keys implementation above the storage engines
>> My first question to this topic is...how far along is it? Has the 
>> handler.h
>> interface been changed yet? If yes what when will the internals 
>> documentation
>> be changed? Does this implementation only include the foreign keys or 
>> does it
>> also include unique constraints and/or range constrains or similar?
> To my knowledge, work on this feature has not started yet. Again, I will 
> ask
> for more details.
> It is planned to implement this in MySQL 5.2 - you can follow the 
> development
> of this version via BK: http://mysql.bkbits.net:8080/mysql-5.2
> By the way, the BK website mentions a special academic licensing program. 
> It
> might be worth asking them for more details:
> http://www.bitkeeper.com/Products.BK_Pro.FAQ.html
>> If there are any questions please don't hesitate to ask. Also if the 
>> answers
>> are a bit to long for eMails I'm always willing to talk in person!
> Let me see what I can dig up.
> Bye,
> LenZ
> - -- 
> Lenz Grimmer <lenz@xxxxxxxxx>
> Community Relations Manager, EMEA
> MySQL GmbH, http://www.mysql.de/, Hamburg, Germany
> MySQL Users Conference 2006 (Santa Clara CA, 24-27 April) - 
> http://www.mysqluc.com/
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