text: --  @testpoint:在线创建索引
  
  --建普通表
  DROP TABLE if EXISTS test_index_table_178 CASCADE;
  create table test_index_table_178(
  c_int int);
  
  drop index if exists index_178_01;
  create index concurrently index_178_01 on test_index_table_178(c_int);
  select relname from pg_class where relname like 'index_178_%';
  
  explain select c_int from test_index_table_178 where c_int > 50 group by c_int;
  
  --清理环境
  DROP TABLE if EXISTS test_index_table_178 CASCADE;
  