Software Environment:

• openLooKeng version (source or binary):
  openlooKeng1.1.0RC6

• OS platform & distribution (eg., Linux Ubuntu 16.04):
  Two coordinator

• Java version:

Describe the current behavior

Create btree index for 2 partition columns， show index has one partition columns

Describe the expected behavior

Create btree index for 2 partition columns， show index has two partition columns

Steps to reproduce the issue

1. Create two tables
   create table tb_test1(p1 int,p2 int,p3 int) with (partitioned_by=array['p3']);
   create table tb_test2(p1 int,p2 int,p3 int) with (partitioned_by=array['p3']);
2. Insert data into tables
   insert into tb_test1 values(1,1,1);
   insert into tb_test1 values(2,2,2);
   insert into tb_test1 values(3,3,3);
   insert into tb_test2 values(1,1,1);
   insert into tb_test2 values(2,2,2);
   insert into tb_test2 values(3,3,3);
3. create index for one table and show index
   create index idx1 using btree on tb_test1(p1) where p3=1;
   create index idx1 using btree on tb_test1(p1) where p3=2;
   
   4.create index for another table and show index
   create index idx2 using btree on tb_test2(p1) where p3=1;
   

Related log/screenshots

Step3：Create index for 2 partition column， but there is only one partition column in ‘show index’
Step4：After create another index for another table，the index of Step3 show 2 partition column created

Special notes for this issue