Documentation/How Tos/Using SQLite With OpenOffice.org
- 1 Introduction
- 2 Installation
- 3 Setup of SQLite database
- 4 Connecting OpenOffice to a SQLite database
- 5 Working on the database with OpenOffice
- 6 Exchanging databases between users
OpenOffice Base provides functions to connect to other databases than the default HSQL database. This Tutorial should guide you through the steps to connect OpenOffice to a SQLite database file.
What is SQLite?
SQLite is a basic database engine that implements most of the features of SQL92. Unlike PostgreSQL and MySQL, SQLite stores a whole data base with all its tables a single file. Other benefits are: database access requires no database server, database files can be freely shared between machines with different byte orders and databases can be up to 2 terabytes (241 bytes) in size. Plus it is fast (twice as much as PostgreSQL and MySQL for most operations) and has a small memory footprint.
Data management can be achieved in the following ways:
- Via a C/C++ Linux library or Windows DLL.
- Via an in-line program (sqlite: available under Linux and Windows) that makes it possible to create and to manage the files of data bases.
- Via the SQLite PHP module or, if you have, PHP version 5 internally to a SQLite database.
- Via ODBC (Linux and Windows) which allows any application supporting this standard to reach a SQLite database.
- Using the experimental SDBC SQLite driver
This guide addresses ODBC which OpenOffice uses to attach to databases and SQLite, in particular.
Why use SQLite with OpenOffice?
The use of SQLite has many advantages:
- The data base is in only one file, in contrast to dBASE which creates a file per table, making it easy to exchange databases between various users.
- Java JRE or SDK is not required to support SQLite.
- No server is needed (local or remote) to access a database.
- ODBC drivers exist for *NIX and for Windows, thus enabling users of both environments to access data and exchange them.
- A new SDBC driver (native to OpenOffice) is available for experimentation.
- Sophisticated graphic interfaces, such as those of msaccess, can be easily developed using the forms, queries, states and macros of OpenOffice.org. These interfaces are stored separately in OpenOffice .odb files and can be exchanged independent from the data between users under UNIX or Windows.
and some disadvantages:
- Modifying the structure of a SQLite table after its creation is not directly possible. This means that you cannot easily add fields nor to modify their properties once that the table is created. Therefore you must prepare the structure of your tables before creating them.
- OpenOffice.org requires the use of the ODBC driver for accessing a SQLite database thus making this operation somewhat complicated. First it must be declared in ODBC and then in OpenOffice. The native SDBC driver should correct this situation when it is production ready.
- The initial database file cannot be created with OpenOffice but by using other tools.
In short, the principal advantages of the use of SQLite with OpenOffice are the format of data storage and the portability from one environment to another. In the list of disadvantages, the two last are not specific to SQLite, but are requirements of using ODBC. However, these are not as awkward as they do not take place during the initial creation of the database.
|SQLite appeals to anyone frustrated with using MDB files under Linux, or who has had difficulty installing MySQL or other RDBMS server on their workstation.|
Unix ODBC Platform
Connection to a SQLite database will be established through UnixODBC. ODBC is an open specification to provide applications with a consistent interface to a variety of data sources. UnixODBC is an implementation of this specification for non-Windows platforms.
You can install unixodbc with your distribution's package manager, or download the sources from the UnixODBC website. The unixodbc-bin package provides a GUI application for configuration, which will be used below. Under Ubuntu or similar Linux distributions, you can use the command:
sudo apt-get install unixodbc unixodbc-bin
Obviously you will need to install SQLite if it is not installed already as this will be the database you want to connect to.
You can install SQLite with your distributions package manager. The package should be called sqlite or sqlite3. Under Ubuntu:
sudo apt-get install sqlite3
If you prefer, you can always download and install the latest version from source.
SQLite ODBC Driver
For SQLite to work through the ODBC standards you will also need to install and configure the SQLite ODBC Driver. This driver is available in Ubuntu in the libsqliteodbc package.
If you prefer, you can download the source and compile it yourself. You will need the unixodbc-dev and libsqlite3-dev packages installed for it to build successfully.
To complete the installation the driver has to be integrated into unixODBC. To do this, launch the ODBCConfig utility as root in an terminal window:
|If ODBCConfig is not found check that you also installed the unixODBC-bin package while installing the ODBC drivers.|
Click the Drivers tab and choose Add… Then fill the fields as follows:
Name: SQLite Description: SQLite for ODBC Driver: /usr/lib/libsqlite3odbc.so Driver64: /usr/lib64/libsqlite3odbc.so Setup: /usr/lib/libsqlite3odbc.so Setup64: /usr/lib64/libsqlite3odbc.so
|If you are still using a 2.8.x version of libsqlite the driver names will be different. Try browsing the folder by clicking on the arrow at the right and select one that seems suitable.|
The driver installation under Linux is now finished and you can exit ODBCConfig.
For those who do not have ODBCConfig or who prefer to carry out this configuration manually, it is necessary to edit the file /etc/odbcinst.ini as root and add the following lines:
[SQLite] Description= ODBC for SQLite Driver= /usr/lib/libsqliteODBC.so Driver64= /usr/lib64/libsqliteODBC.so Setup= /usr/lib/libsqliteODBC.so Setup64= /usr/lib64/libsqliteODBC.so FileUsage= 1 CPTimeout= CPReuse=
Setup of SQLite database
Creating a SQLite database file
An initial database file cannot be created directly in Apache OpenOffice but rather this is accomplished by using either the utility “sqlite” on the command line or by using a graphical management tool, a list of GUIs is available at SQLite.org
The utility "sqlite" should be already installed if you use Linux and have installed SQLite from rpm. For other *NIX systems, you must build SQLite from source which you can find at www.sqlite.org/download
Performance and usage under Linux and Windows is identical.
If this database file does not exist yet, it will be created automatically. Using sqlite you can also create tables and modify your database with standard SQL-commands:
$ sqlite <filename of database> SQLite version 2.8.12 Enter ".help" for instructions sqlite> CREATE TABLE mytable (id INT, text VARCHAR(100)); sqlite> .exit
|You can then check that the file was, indeed, created in your filesystem. The name of the file does not require a file extension, but you can give it the extension db so that is easy to locate as a database.|
Using sqlite on the command line program makes it possible to create tables and indices, to enter and post data and to make queries provided you know the SQL language - however, it is more practical for beginners to carry out these operations later on using OpenOffice.
Using SQLite Database Browser
There is also a graphical utility for creating and manipulating SQLite databases called sqlitebrowser. You can install this using your distribution's package manager.
After unpacking the file, launch sqlitebrowser and select File/New Database or the corresponding icon:
Choose the directory in which to place the file and then enter the name of the database file and click on Save.
Using this program, you can also create the tables, the fields, and the indices, to access data and to visualize them. While sqlitebrowswer is suitable for these actions, there is the disadvantage that it does not show the full list of field types during field creation. In this case, it may be preferable to do it later using Apache OpenOffice.
ODBC-setup of new database
After creating a new SQLite database above you now have to configure this database in ODBC so you can connect to it in OpenOffice later on.
Connecting OpenOffice to a SQLite database
You had to spend a lot of time installing and configuring other things but finally we can move on to OpenOffice. Only a few more configuration windows and you will be done.
Start OpenOffice Base and in the first step 1. Select database chose the third option, connect to an existing database using ODBC.
Connect to an existing database ODBC
In the second step 2. Set up ODBC connection you can select your SQLite database. Clicking on Browse you should get a list of all databases you have configured in ODBC.
If nothing is showing up here you have a problem. Check that you actually set up the database in ODBC and that the drivers are properly configured as described.
Working on the database with OpenOffice
The rest is OpenOffice Base just as you know it.
Only note a few things: Creating new tables using OpenOffice is possible. Those tables - along with all data you enter in them - are saved in the external SQLite database file to which you connected your OpenOffice .odb file.
Fields defined as type "integer" are auto-increment, that is they automatically increment the value of the field when adding a new record in this table.
|Once you have saved your table, you cannot modify it! I.e. you will not be able to modify the properties of the fields any more, nor add or remove!|
This rather awkward constraint is specific to SQLite, which does not handle the SQL command ALTER COUNTS, and not the ODBC driver. This limitation is designed in by the authors in order to make the basic database engine as light as possible. However, this limitation may be eliminated in a future version. Therefore you are advised to check your table structure very carefully before recording it.
If you must modify a table, the only solution is to create a new table and save it under different name. By doing so, you can transfer the data from the original table to the new table.
Creating and using Forms, Queries and Reports are all independent of the datasource you use. They will function just as with the default integrated HSQL-database and will still be saved in your odb-file. For more information on these topics refer to the other documentation.
Exchanging databases between users
Thanks to the availability of the sqliteODBC driver for both Linux and Windows (just as for OpenOffice, of course!), a SQLite database can be easily exchanged between users of the two environments. It is necessary that each has an installed ODBC driver that is aware of the target SQLite file and which is defined as a data source in OpenOffice. Likewise, OpenOffice Base files (.odb) containing forms and macros can also be exchanged between users of the two environments.
|If forms are to function correctly for each user, it is absolutely necessary that each user applies exactly the same name to the data source during its creation.|
|Content on this page is licensed under the Public Documentation License (PDL).|