Ada Database Objects

Ada Database Objects is an Ada05 library that provides object relational mapping to access a database in Ada05. The library supports Postgresql, MySQL, SQLite as databases. Most of the concepts developped for ADO come from the Java Hibernate ORM.

The ORM uses an YAML, XML mapping file or an UML model, a code generator and a runtime library for the implementation. It provides a database driver for Postgresql, MySQL and SQLite. The ORM helps your application by providing a mapping of your database tables directly in the target programming language: Ada05 in our case. The development process is the following:

• You design your database model either using a UML tool or by writing a YAML or XML description,
• You generate the Ada05 mapping files by using the Dynamo code generator,
• You generate the SQL database tables by using the same tool,
• You write your application on top of the generated code that gives you direct and simplified access to your database.

You need at least one of these databases (or all of then). The configure script will now fail if no supported database was found. Check the Database Drivers section to install them and run the configure again after the installation.

Version 2.4.0 - Aug 2023

• Feature #11: Support to audit creation of new objects in the database
• Feature #12: Support for database migration
• Fix #14: Problems with SQLite transactions
• Fix #15: Use ADO_BUILD instead of BUILD in the Alire crate configuration
• Fix #16: Status SQLITE_ROW is treated as an error
• Fix #18: Has_Table does not work for PostgreSQL

List all versions

Build with Alire

alr with ado
alr with ado_sqlite
alr with ado_mysql
alr with ado_postgresql

Build with configure

To build ADO, you will need:

• Ada Util
• XML/Ada

You should have installed either Postgresql, MySQL or SQLite before running the configure script. For Windows, please read the file win32/README that gives some installation hints.

Build with the following commands:

./configure
make

Samples

The samples can be built using:

gnatmake -Psamples

Before launching the samples, the database must have been created. For SQLite, use:

make samples.db

Documentation

The Ada Database Objects sources as well as a wiki documentation is provided on:

• Ada Database Objects Programmer's Guide PDF
• ADO Documentation
• ADO Sessions
• ADO Statements
• ADO Queries
• ADO Drivers

Presentations

• Persistence with Ada Database Objects FOSDEM 2019
• Uses Ada Database Objects: Implementing a build manager in Ada

Database Drivers

The Postgresql, MySQL and SQLite development headers and runtime are necessary for building the ADO driver. The configure script will use them to enable the ADO drivers.

Postgresql Development installation

sudo apt-get install postgresql-client libpq-dev

MySQL Development installation

sudo apt-get install mariadb-client libmariadb-client-lgpl-dev

SQLite Development installation

sudo apt-get install sqlite3 libsqlite3-dev

For Windows, check win32/README to install the libraries.

Database Creation

Create the tests database by using the Dynamo command. (Dynamo is available at: https://gitlab.com/stcarrez/dynamo) Note: change 'root' and 'password' to a MySQL user that has admin access rights ('create database' and 'grant option' privileges).

dynamo create-database db/regtests root password

The default database connection string is defined in dynamo.xml. You can also specify the connection string and create the schema by using:

dynamo create-database db/regtests 'mysql://localhost:3306/ado_test?user=ado' root password

MySQL setup

To create manually the database, you can proceed to the following steps:

1. Create the 'ado_test' database in MySQL

sudo mysql
mysql> CREATE DATABASE ado_test;

2. Create the 'ado' user and give the access rights:

mysql> CREATE USER 'ado' IDENTIFIED BY '';

mysql> GRANT SELECT, INSERT, UPDATE, DELETE,
       CREATE, DROP, CREATE TEMPORARY TABLES, EXECUTE,
       SHOW VIEW ON `ado_test`.* TO ado@'%';
mysql> FLUSH PRIVILEGES;

3. Create the tables

mysql> USE ado_test
mysql> SOURCE db/regtests/mysql/create-ado-mysql.sql

Postgresql setup

To create manually the database, you can proceed to the following steps:

1. Create the 'ado' user and configure the password (enter 'ado' for the password or update the Makefile as well as the test-postgresql.properties file):

sudo -u postgres createuser ado --pwprompt

2. Create the 'ado_test' database in Postgresql

sudo -u postgres createdb -O ado ado_test

3. Create the tables

psql "postgresql://localhost:5432/ado_test?user=ado&password=ado" \
  --file=db/regtests/postgresql/create-ado-postgresql.sql

Testing

Before running the unit tests for MySQL or Postgresql, you must create the test database as described in Database Creation.

The unit tests are built and executed using:

make test

To run manually the unit tests, use the following commands:

bin/ado_harness -config test-mysql.properties

or

bin/ado_harness -config test-sqlite.properties

or

bin/ado_harness -config test-postgresql.properties

Building documentation

The ADO Programmer's Guide is generated by using Dynamo and Pandoc. You may need the following Debian packages:

sudo apt-get install pandoc xsltproc texlive-latex-base texlive-latex-extra texlive-fonts-extra

The documentation is created by the following command:

make doc

and the book is generated in the ado-book.pdf file.