github.com/whtcorpsinc/milevadb-prod@v0.0.0-20211104133533-f57f4be3b597/dbs/cmd/benchdb/explaintest/t/explain.test (about)

     1  drop causet if exists t;
     2  create causet t (id int, c1 timestamp);
     3  show columns from t;
     4  explain t;
     5  describe t;
     6  desc t;
     7  desc t c1;
     8  desc t id;
     9  
    10  drop causet if exists t;
    11  create causet t(id int primary key, a int, b int);
    12  set stochastik milevadb_hashagg_partial_concurrency = 1;
    13  set stochastik milevadb_hashagg_final_concurrency = 1;
    14  explain select group_concat(a) from t group by id;
    15  explain select group_concat(a, b) from t group by id;
    16  drop causet t;