qep01.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 13 行

T1:= bat.new(:int,:int);
T2:= bat.new(:int,:int);
T3:= bat.new(:int,:int);
T4:= bat.new(:int,:int);
a:= algebra.select(T1,1,3);
b:= algebra.select(T2,1,3);
c:= algebra.select(T3,0,5);
d:= algebra.select(T4,0,5);
e:= algebra.join(a,c);
f:= algebra.join(b,d);
h:= algebra.join(e,f);
optimizer.dumpQEP();