sql2class: C++ from SQL generator    main page    |    sample code    |    sample code with -stl

This example will generate code with std::string from the standard template library. Changes from the previous example are highlighted with bold text.

Usage example with '-stl' option

How to create a mysql sample database, one sample table, and then generate source code and build a library for that table using sql2class.

$ mysqladmin create sampledb
$ mysql sampledb
MySQL> create table sampletable ( num integer auto_increment not null,
MySQL>  name varchar(255) default '' not null,
MySQL>  primary key(num));
MySQL> quit
$ mysqldump -d sampledb > str-sampledb
$ sql2class -build -global -stl -lib libsampledb str-sampledb -namespace db -overwrite

Code generation

Generated source code documentation by Doxygen

Sample code

#include <mysql/mysql.h>
#include <libsql++.h> // the mysql api wrapper
#include <libsampledb.h> // our fresh lib

int main(int argc,char *argv[])
{
	Database db("localhost","myuser","","sampledb");

	// create records for each input argument
	for (int i = 1; i < argc; i++)
	{
		if (strlen(argv[i]) < 255)
		{
			db::Sampletbl tbl(&db);
			tbl.name = argv[i];
			tbl.save();
		}
	}

	// read and display all records
	Query q(&db);
	q.get_result("select * from sampletbl");
	while (q.fetch_row())
	{
		db::Sampletbl tbl(&db,&q); // spawns an object from Query object
		printf("%ld: %s\n",tbl.num,tbl.name.c_str());
	}
	q.free_result();

	// spawn an object using primary key
	{
		db::Sampletbl tbl(db, 1);
		if (tbl.num) // member variables will still be reset if query fails
		{
			printf("%ld: %s\n",tbl.num,tbl.name.c_str());
		}
	}

} // main