Date: Wed, 01 Dec 2010 15:46:12 +0500
From: ghatpande@vsnl.net
Subject: Re: Proposal: First step towards Intelligent,
 integrateddatabase
In-reply-to: 
 <87F42982BF2B434F831FCEF4C45FC33E4209B193@EXCHANGE.corporate.connx.com>
To: Dann Corbit <DCorbit@connx.com>
Cc: pgsql hackers <pgsql-hackers@postgresql.org>
Message-id: <e4c6b847677.4cf66dc4@vsnl.net>
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References: <e66387cf27cb.4cf66784@vsnl.net>
	<87F42982BF2B434F831FCEF4C45FC33E4209B193@EXCHANGE.corporate.connx.com>

Create domain is only useful for abstracting common constraints on fields into single location for maintenance. It may not be useful to link tables.

----- Original Message -----
From: Dann Corbit <DCorbit@connx.com>
Date: Wednesday, December 1, 2010 4:04 pm
Subject: RE: [HACKERS] Proposal: First step towards Intelligent,integrateddatabase
To: "'ghatpande@vsnl.net'" <ghatpande@vsnl.net>, pgsql hackers <pgsql-hackers@postgresql.org>

> I am probably just being thick, but how is your idea different 
> from create domain:
> http://www.postgresql.org/docs/current/static/sql-createdomain.html
> 
> 
> From: pgsql-hackers-owner@postgresql.org [mailto:pgsql-hackers-
> owner@postgresql.org] On Behalf Of ghatpande@vsnl.net
> Sent: Wednesday, December 01, 2010 2:20 AM
> To: pgsql hackers
> Subject: [HACKERS] Proposal: First step towards 
> Intelligent,integrated database
> Importance: High
> 
> Hello,
> 
> Here is the proposal:  My 1st step towards Intelligent, Integrated 
> database. I am explaining the proposal with the use of example.
> Example: We will have a master table say CustMast and a 
> transaction table say salesOrder table.
> View of CustMast:
> CustCode    Number(5),
> CustName  Varchar(30),
> CustAdrsLine1   Varchar,
> CustAdrsLine2   varchar  etc.
> View of SalesOrder:
> Sordno    Number(8),
> Sorddt     date,
> CustCode  Number(5)  -  present way of defining.
> Proposed way is:
> CustCode Object CustMast.     --- New data type to be introduced 
> called "O" Object and create table definition to be modified 
> whenever data type is 'O', it will accept object name (in this 
> case table name). Here I want to inform data definition that field 
> and its data type is already defined in master table and use the 
> same data type here and both tables are linked with this field.
> We will be using same field name in both tables if not along with 
> table name field name is to be accepted in create table definition.
> Advantages:
> 
> 1.       Now database knows that custcode in salesorder is a 
> foreign key, a table constraint can be created. It also knows that 
> index to be created on this field.
> 
> 2.       In present situation select statement for selecting 
> values from join of both tables will be
> 
> Select sordno, sorddt, custcode, custname, custadrsline1
> 
> from salesorder, custmast
> 
> where salesorder.custcode=custmast.custcode.
> 
> 3.       In proposed way we can write this statement as:
> 
> Select sordno, sorddt, custcode, custname, custadrsline1
> 
> from salesorder  (with proper changes in program which pickup 
> values from select statement.
> 
> 4.       Field can be from another table in same database or from 
> Excel sheet column.
> 
> 5.       Views need not be created as all tables are properly 
> linked with each other in an application.
> 
> 6.       This is only first step and many advantages can be a 
> result of brainstorm.
> 
> 7.    This will change RDBMS, Tools and ERP to next generation.
> 
> 
> 
> For any clarifications pl contact. Pl give your feedback.
> 
> 
> 
> Regards Many,
> 
> Vijay Ghatpande.
> 
> Cell: +91 9822456142.
>