append_dense_tail.mal

一个内存数据库的源代码这是服务器端还有客户端

# create an empty [void,oid] BAT with dense tail
a := bat.new(:oid,:oid);
bat.append(a,1@0);
bat.delete(a,0@0);
# create a non-empty [void,oid] BAT with non-dense tail
b := bat.new(:oid,:oid);
bat.append(b,0@0);
bat.append(b,0@0);
bat.append(b,0@0);
# append the latter to the former
 bat.append(a,b);
io.print(a);
# check important properties
f:= bat.new(:void,:str);
bat.append(f,"hseqbase");
bat.append(f,"hdense");
bat.append(f,"tseqbase");
bat.append(f,"tdense");
fr:= bat.reverse(f);
fm:= bat.mirror(fr);
i:= bat.info(a);
j:= algebra.join(fm,i);
io.print(j);