Hallo,
for a SQLite db I would like to define a collation for german "Umlaute"
(don't know the english word for that, sorry) and "Sonderzeichen" (äöü,
ÄÖÜ, ß), so that:
a=A=ä=Ä
o=O=ö=Ö
u=U=ü=Ü
ß=s (or, better: ß=ss)
I want to use such a collation even on columns which are indeces, so I
would like to "connect" the collation to the column/index at the time
creating the column/index, not only in the later SELECTs. And I suppose,
that I really don't have to specify the collation in the SELECTs if it
is connected to the index. Is that right?
It should work like that:
CREATE TABLE person (name text);
CREATE INDEX idx_name on person (name COLLATE umlaute);
and later on
SELECT name FROM person ORDER BY name;
/* whithout specifying the collation again! */
should give
Ortin
Ötzkök
Pandulas
Zurmühlen
instead of
Ortin
Pandulas
Zurmühlen
Ötzkök
I'm sure, that I'm not the first fellow, who would like, but I don't
find a solution for my problem.
Any help will be very wellcome!
By the way: I define my db, tables and indices using a SQL script, which
I execute by the .read command in sqlite3 (under Ubuntu Linux). But I
don't find any possibility to define any collation. I just found how to
use an allredy existing collation. Isn't it possible, what I want?
Another way could be possible: I use python as my programming language,
with the apsw module to connect to the SQLite db. There is a method
apsw.connection.createcollation, which registers a
(python)-sorting-(collate-)function as a collation. That can be used
later, for example in SELECTs. Could it also be used in CREATE TABLEs or
CREATE INDEXs? In this case I could define my db, tables and indices
within python/apsw instead of the SQL-script and .read. Right?
The background is very simple: in my db I store german people with their
name, address and so on, and there are these "Umlaute" in the names, and
the row name has its own index.
Now I brought more text then I would like to... but I hope for Your help!
Ulrich
--
Ulrich Goebel
Paracelsusstr. 120, 53177 Bonn
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