정수 다루는 방법에 대한 예제. square (제곱)를 구하는 함수

   Copyright ?1998 by Nem W Schlecht
   This file is public domain and comes with NO WARRANTY of any kind

MySQL SQL code for creating/deleting this function in the 'mysql' database:

CREATE FUNCTION square RETURNS INTEGER SONAME "int_example.so";
DROP FUNCTION square;

Compile line:

CC -DMYSQL_SERVER -DDEFAULT_MYSQL_HOME="\"/local/mysql\""
-DDATADIR="\"/local/mysql/var\"" -DSHAREDIR="\"/local/mysql/share/mysql\""
-DHAVE_CONFIG_H -DUSE_ALARM_THREAD -O3 -DDBUG_OFF
-I/local/mysql/include/mysql -I/local/src/SQL/mysql-3.22.4-beta/include
-I/local/src/SQL/mysql-3.22.4-beta -shared -o int_example.so int_example.cc