***************   Case 1   ***************
purge table t1;
{
  "stmt_type":136,
  "purge_table_arg": {
    "tenant_id":1,
    "table_name":"t1"
  }
}
***************   Case 2   ***************
purge database db1;
{
  "stmt_type":135,
  "purge_db_arg": {
    "tenant_id":1,
    "db_name":"db1"
  }
}
***************   Case 3   ***************
purge schema db1;
{
  "stmt_type":135,
  "purge_db_arg": {
    "tenant_id":1,
    "db_name":"db1"
  }
}
***************   Case 4   ***************
purge tenant tenant1;
{
  "stmt_type":134,
  "purge_tenant_arg": {
    "tenant_id":1,
    "tenant_name":"tenant1"
  }
}