qep00.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 9 行

# demonstrate the QEP construction
R:= bat.new(:void,:int);
S:= bat.new(:void,:int);
E1:= algebra.select(R,1,3);
E2:= algebra.select(S,4,9);
R2:= bat.reverse(E2);
J1:= algebra.join(E1,R2);
optimizer.dumpQEP();