aboutsummaryrefslogtreecommitdiff
path: root/bulk/README
diff options
context:
space:
mode:
Diffstat (limited to 'bulk/README')
-rw-r--r--bulk/README63
1 files changed, 63 insertions, 0 deletions
diff --git a/bulk/README b/bulk/README
new file mode 100644
index 0000000..a068898
--- /dev/null
+++ b/bulk/README
@@ -0,0 +1,63 @@
+This is a "Hello World" example that shows how to use ODB to perform basic
+database operations, such as making objects persistent, loading, updating
+and deleting persistent objects, as well as querying the database for
+objects matching a certain criteria. It also includes an example of a
+simple view.
+
+The example consists of the following files:
+
+person.hxx
+ Header file defining the 'person' persistent class as well as the
+ 'person_stat' view.
+
+person-odb.hxx
+person-odb.ixx
+person-odb.cxx
+person.sql
+ The first three files contain the database support code and the last file
+ contains the database schema for the person.hxx header.
+
+ These files are generated by the ODB compiler from person.hxx using the
+ following command line:
+
+ odb -d <database> --generate-query --generate-schema person.hxx
+
+ Where <database> stands for the database system we are using, for example,
+ 'mysql'.
+
+database.hxx
+ Contains the create_database() function which instantiates the concrete
+ database class corresponding to the database system we are using.
+
+driver.cxx
+ Driver for the example. It includes the person.hxx and person-odb.hxx
+ headers to gain access to the persistent classes and their database support
+ code. It also includes database.hxx for the create_database() function
+ declaration.
+
+ In main() the driver first calls create_database() to obtain the database
+ instance. Then it executes a number of database transactions on persistent
+ objects.
+
+To compile and link the example manually from the command line we can use
+the following commands (using MySQL as an example; replace 'c++' with your
+C++ compiler name):
+
+c++ -c person-odb.cxx
+c++ -DDATABASE_MYSQL -c driver.cxx
+c++ -o driver driver.o person-odb.o -lodb-mysql -lodb
+
+To run the example we may first need to create the database schema (for some
+database systems, such as SQLite, the schema is embedded into the generated
+code which makes this step unnecessary). Using MySQL as an example, this
+can be achieved with the following command:
+
+mysql --user=odb_test --database=odb_test < person.sql
+
+Here we use 'odb_test' as the database login and also 'odb_test' as the
+database name.
+
+Once the database schema is ready, we can run the example (using MySQL as
+the database):
+
+./driver --user odb_test --database odb_test