***************   Case 1   ***************
drop database if exists database_test;
{
  "drop_database_arg":"tenant_id",
  "database_name":"database_test",
  "if_exist":true,
  "to_recyclebin":false
}
***************   Case 2   ***************
create database if not exists database_test;
{
  "create_database_arg":"database_schema",
  "database_id":-1,
  "schema_version":1,
  "database_name":"database_test",
  "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   ***************
alter database database_test CHARACTER SET UTF8;
{
  "alter_database_arg":"database_schema",
  "database_id":-1,
  "schema_version":1,
  "database_name":"database_test",
  "replica_num":0,
  "zone_list": [
  ],
  "primary_zone":"",
  "charset_type":2,
  "collation_type":"invalid_type",
  "name_case_mode":-1,
  "comment":"",
  "read_only":false,
  "default_tablegroup_id":-1,
  "default_tablegroup_name":"",
  "in_recyclebin":false,
  "primary_zone_array": [
  ]
}
***************   Case 4   ***************
alter database database_test collate utf8mb4_general_ci;
{
  "alter_database_arg":"database_schema",
  "database_id":-1,
  "schema_version":1,
  "database_name":"database_test",
  "replica_num":0,
  "zone_list": [
  ],
  "primary_zone":"",
  "charset_type":0,
  "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 5   ***************
alter database database_test CHARACTER SET UTF8 collate utf8mb4_general_ci;
{
  "alter_database_arg":"database_schema",
  "database_id":-1,
  "schema_version":1,
  "database_name":"database_test",
  "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 6   ***************
drop database database_test;
{
  "drop_database_arg":"tenant_id",
  "database_name":"database_test",
  "if_exist":false,
  "to_recyclebin":false
}
***************   Case 7   ***************
create database database_test CHARACTER SET UTF8;
{
  "create_database_arg":"database_schema",
  "database_id":-1,
  "schema_version":1,
  "database_name":"database_test",
  "replica_num":0,
  "zone_list": [
  ],
  "primary_zone":"",
  "charset_type":2,
  "collation_type":"invalid_type",
  "name_case_mode":-1,
  "comment":"",
  "read_only":false,
  "default_tablegroup_id":-1,
  "default_tablegroup_name":"",
  "in_recyclebin":false,
  "primary_zone_array": [
  ]
}
***************   Case 8   ***************
drop database database_test;
{
  "drop_database_arg":"tenant_id",
  "database_name":"database_test",
  "if_exist":false,
  "to_recyclebin":false
}
***************   Case 9   ***************
create database database_test collate utf8mb4_general_ci;
{
  "create_database_arg":"database_schema",
  "database_id":-1,
  "schema_version":1,
  "database_name":"database_test",
  "replica_num":0,
  "zone_list": [
  ],
  "primary_zone":"",
  "charset_type":0,
  "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 10   ***************
drop database database_test;
{
  "drop_database_arg":"tenant_id",
  "database_name":"database_test",
  "if_exist":false,
  "to_recyclebin":false
}
***************   Case 11   ***************
create database database_test CHARACTER SET UTF8 collate utf8mb4_general_ci;
{
  "create_database_arg":"database_schema",
  "database_id":-1,
  "schema_version":1,
  "database_name":"database_test",
  "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": [
  ]
}