todo

b树实现源码,linux和unix下运行,速度快,极好用

1.create table
.insert 10 tuples
.check for 0 index nodes
.create index
.insert 10 tuples
.check for 20 index nodes

2.create table
.create index
.insert 10 tuples
.drop index
.check for 0 index nodes

3.create table
.create two index
.insert 10 tuples
.check for 10 index nodes in both indexes

4.create table
.create two index
.insert 10 tuples
.drop index idx2
.insert 10 tuples
.check for 20 nodes in idx1 and 0 nodes in idx2