[libreoffice-users] Re: Another question concerning Base

Le 16/08/12 00:56, Thomas Taylor a écrit :

Hi Thomas,

> When creating a table in Base with the wizard, is it possible to use a
> boolean (yes/no) to control further input fields?  If so, how please?
> my assumption is that entry conditional control must be done without
> the wizard.

No, the wizard is not designed to let you do this, it will only do the
most basic of table creation tasks. Anything more sophisticated than
that would require programming skills and be dependent on the
functionality of the underlying database engine.

Note also that despite the possibility to enter data directly into a
Table View or Grid View (the terms often get mixed up together), the
LibreOffice API is documented as only supporting Form based
XBindableControls, i.e. there is no direct support for binding controls,
conditional or not, directly to the Table View that users can use to
enter data or when creating a new table in Table Design.

Confused ? You should be. ;-)

If you want an English book on programming with Base, look at Roberto
Benitez' book :

http://www.amazon.com/Database-Programming-OpenOffice-org-Base-Basic/dp/0557007585/ref=sr_1_11?ie=UTF8&qid=1345449641&sr=8-11&keywords=roberto+benitez

Also check out Andrew Pitonyak's use of Basic with Base :
http://www.pitonyak.org/database/


If you can read German, I would suggest one of Thomas Krumbein's books :

http://www.amazon.com/Datenbanken-mit-OpenOffice-org-Base-HSQLDB/dp/383621301X/ref=sr_1_4?s=books&ie=UTF8&qid=1345449757&sr=1-4&keywords=thomas+krumbein

If you can read French, check out Laurent Godard/Bernard Marcelly's book :


http://www.eyrolles.com/Informatique/Livre/programmation-openoffice-org-et-libreoffice-9782212132472


The fact that most of the books/references above relate to
OpenOffice.org and not LibreOffice is not a major obstacle, there have
not been that many significant changes in the Base module behaviour
since the creation of the LibreOffice project :

- AOOo has moved its hsqldb engine to an improved version 2, whereas LO
is still stuck on version 1.8 ;

- AOOo has removed direct support for the mysql native connector due to
licensing issues, it is still provided as a download for older versions
of OOo, but is no longer being actively supported ;

- LO no longer has any actively supported native mysql connector either,
but for the moment, an attempt to not break the existing external
extension is being maintained ;

- LO has read/write native connector support for postgresql - this, I
believe, is a major improvement over AOOo, which only had read support,
and the postgres native connector is no longer even offered with AOOo
due to licensing issues ;

- both AOOo and LO support JDBC driver connections to postgresql and
mysql databases ;

- both AOOo and LO are supposed to support ODBC driver connections -
however, this is very dependent on OS, bit version architecture (32/64)
and buggy behaviours of the 3rd party drivers ;

- LO support of MS Access databases on Windows is variable according to
LO version and Access mdb/accdb version - one day it works with one
version of LO, the next it doesn't, so your mileage may vary - I can't
speak for AOOo here as I haven't tested that bit ;

- Access databases are not supported in either LO or AOOo on other OSes
(i.e. Linux/Mac), to my knowledge - these are usually dealt with by 3rd
party programs.

This is only a short comparison, I'm sure there are other points that
could be mentioned, but on the whole, the basic DB functionality between
the two is pretty much the same. That situation is likely to change with
the switch to LO version 4 development, where it has already been
decided that backwards version (ABI) compatibility for all
functionalities of the LO suite will not be guaranteed. At the moment, I
have no idea how that will affect Base, but it will almost certainly
affect any extensions that are currently available.


Alex


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