Re: How to represent a tree-structure in a relationaldatabase - Mailing list pgsql-sql

From Alvar Freude
Subject Re: How to represent a tree-structure in a relationaldatabase
Date
Msg-id 3A398F50.9EBAADB8@merz-akademie.de
Whole thread Raw
In response to How to represent a tree-structure in a relational database  (Frank Joerdens <frank@joerdens.de>)
List pgsql-sql
Hi,

>
> > I once started writing a small paper on this subject; it is still in a
> > rather preliminary state.
> >
> > You can download the draft (and some ill documented code, 53kB) from
> >   http://www.utdt.edu/~mig/sql-trees
>

i guess, with base 160 encoding there might be a problem: if postgres is
compiled with --enable-locale (e.g. for german umlauts), the ordering
isn't according to the ASCII number of the character, so for this
purpose it's needed to build the encoding table according to the locate
settings. Or simply sort it according the locale settings.


What's against using all characters >= 32, excluding special characters
with special meaninbg in LIKE and regexps? With base 208 encoding it's
possible to have 43264 elements on each level.


Ciao  Alvar


-- 
Alvar C.H. Freude  |  alvar.freude@merz-akademie.de
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