mat04.mal

一个内存数据库的源代码这是服务器端还有客户端

# select i, sum(j) from t group by i having i>4;
mdb.list();
#   v3:bat[:void,:int]  := sql.bind("sys","t","i",0);
    v3v0:= bat.new(:void,:int);
    bat.insert(v3v0,nil,0);
    v3v1:= bat.new(:void,:int);
    bat.insert(v3v1,nil,1);
    v3:= mat.new(v3v0,v3v1);

#   v47:bat[:void,:int]  := sql.bind("sys","t","j",0);
    v47v0:= bat.new(:void,:int);
    bat.insert(v47v0,nil,0);
    v47v1:= bat.new(:void,:int);
    bat.insert(v47v1,nil,1);
    v47:= mat.new(v47v0,v47v1);

#   v9:bat[:void,:oid]  := sql.bindvdbat("sys","t",0);
	v9 := bat.new(:void,:oid);
    v11 := bat.reverse(v9);
    v13 := algebra.kdifference(v3,v11);
    v18 := algebra.markT(v13,0@0);
    v20 := bat.reverse(v18);
    v22 := algebra.join(v20,v3);
    (ext26,grp24):= group.new(v22);
    v28 := bat.mirror(ext26);
    v30 := algebra.join(v20,v3);
    v32 := algebra.join(v28,v30);
    v35 := calc.int(3);
    v37 := algebra.uselect(v32,v35,nil:int,false,false);
    v41 := algebra.semijoin(v28,v37);
    v43 := algebra.join(v20,v3);
    v45 := algebra.join(v41,v43);
    v53 := algebra.join(v20,v47);
    v57 := algebra.select(v53,nil:int,nil:int,false,false);
    v59 := bat.reverse(grp24);
    v61 := algebra.semijoin(v59,v37);
    v63 := bat.reverse(v61);
    v65 := aggr.sum(v57,v63,v41);
#   v67 := sql.resultSet(2,3,v45);
#   sql.rsColumn(v67,"t","i","int",32,0,v45);
#   sql.rsColumn(v67,"t","sumvj","bigint",64,0,v65);
#   sql.exportResult(v67);
	io.print(v45,v65);

optimizer.multitable();