***************   Case 1   ***************
drop database if exists generated_column_db;
{
  "drop_database_arg":"tenant_id",
  "database_name":"generated_column_db",
  "if_exist":true,
  "to_recyclebin":false
}
***************   Case 2   ***************
create database generated_column_db;
{
  "create_database_arg":"database_schema",
  "database_id":-1,
  "schema_version":1,
  "database_name":"generated_column_db",
  "replica_num":0,
  "zone_list": [
  ],
  "primary_zone":"",
  "charset_type":2,
  "collation_type":"utf8mb4_general_ci",
  "name_case_mode":-1,
  "comment":"",
  "read_only":false,
  "default_tablegroup_id":-1,
  "default_tablegroup_name":"",
  "in_recyclebin":false,
  "primary_zone_array": [
  ]
}
***************   Case 3   ***************
use generated_column_db;
{
  "stmt_type":97
}
***************   Case 4   ***************
create table t1(c1 int primary key, c2 int as (c1 + 1));