cxerror1.mal

来自「一个内存数据库的源代码这是服务器端还有客户端」· MAL 代码 · 共 26 行

#provided by roberto
function user.f1();
  # create bat
  xxx := bat.new(:void, :dbl);
  bat.setName(xxx,"xxx");
  bat.setPersistent(xxx,true);
  transaction.commit();
  
  # check existance
  xxx_1 := bbp.getNames();
  xxx_2 := bat.reverse(xxx_1);
  xxx_3 := algebra.exist(xxx_2,"xxx");
  
  # if it exists, print it
  barrier ifb := xxx_3;
    a := bbp.bind("xxx");
    io.print(a);
  exit ifb;
  
  # remove it
  b := bbp.bind("xxx");        ## here, it becomes b := a;
  bat.setPersistent(b,false);  ## but a might be not defined
  transaction.commit();
end f1;
optimizer.commonTerms("user", "f1");