Prepares a supplied SQL string.
Execution does not happen until sqlany_execute() is called. The returned statement object should be freed using sqlany_free_stmt().
The following statement demonstrates how to prepare a SELECT SQL string:
char * str;
a_sqlany_stmt * stmt;
str = "select * from employees where salary >= ?";
stmt = sqlany_prepare( sqlany_conn, str );
if( stmt == NULL ) {
// Failed to prepare statement, call sqlany_error() for more info
}