一、作业
1、创建表空间t_tbspace、用户test，并使用test，在这个表空间上创建表t1：
（1）首先打开虚拟机上的数据库服务并进入初始数据库
su - omm
gs_om -t start
gsql -d postgres -p 26000 -r复制
（2）创建表空间t_tbspace
CREATE TABLESPACE t_tbspace RELATIVE LOCATION 'tablespace/test_t_tbspace';复制
（3）创建用户test并赋予权限
CREATE USER test IDENTIFIED BY 'kunpeng@1234';
ALTER USER test SYSADMIN;复制
（4）使用test，在这个表空间上创建表t1
\c postgres test
CREATE TABLE t1(i int) TABLESPACE t_tbspace;复制
2、查看表空间t_tbspace的oid和大小:
（1）查看系统有哪些表空间
select oid,* from pg_tablespace ;复制
（2）查看表空间大小
SELECT PG_TABLESPACE_SIZE('t_tbspace');复制
3、查看数据库在默认表空间下有哪些对象：
根据之前学习的内容，可以用下列代码查询：
--执行下面的SQL语句，查询数据库默认表空间下有哪些对象：
select relname, relkind, relpages,pg_size_pretty(pg_relation_size(a.oid)),reltablespace,relowner
from pg_class a
where a.relkind in ('r', 'i')
and reltablespace='0'
order by a.relpages desc;复制以下是查询到的数据：
relname | relkind | relpages | pg_size_pr
etty | reltablespace | relowner
-----------------------------------------------+---------+----------+-----------
-----+---------------+----------
pg_attribute | r | 168 | 1344 kB
| 0 | 10
pg_proc | r | 107 | 856 kB
| 0 | 10
pg_depend | r | 53 | 424 kB
| 0 | 10
pg_class | r | 44 | 352 kB
| 0 | 10
pg_attribute_relid_attnam_index | i | 41 | 328 kB
| 0 | 10
pg_rewrite | r | 38 | 304 kB
| 0 | 10
pg_proc_proname_args_nsp_index | i | 33 | 264 kB
| 0 | 10
pg_collation | r | 31 | 248 kB
| 0 | 10
pg_depend_reference_index | i | 31 | 248 kB
| 0 | 10
pg_depend_depender_index | i | 31 | 248 kB
| 0 | 10
pg_attribute_relid_attnum_index | i | 28 | 224 kB | 0 | 10
pg_type | r | 19 | 152 kB | 0 | 10
pg_statistic | r | 18 | 144 kB | 0 | 10
pg_description | r | 17 | 136 kB | 0 | 10
pg_operator | r | 15 | 120 kB | 0 | 10
pg_class_relname_nsp_index | i | 13 | 104 kB | 0 | 10
pg_proc_oid_index | i | 12 | 96 kB | 0 | 10
pg_description_o_c_o_index | i | 10 | 80 kB | 0 | 10
pg_class_tblspc_relfilenode_index | i | 9 | 72 kB | 0 | 10
pg_amop | r | 7 | 56 kB | 0 | 10
sql_features | r | 7 | 56 kB | 0 | 10
pg_class_oid_index | i | 7 | 56 kB | 0 | 10
pg_type_typname_nsp_index | i | 7 | 56 kB | 0 | 10
pg_collation_name_enc_nsp_index | i | 7 | 56 kB | 0 | 10
pg_index | r | 6 | 48 kB | 0 | 10
pg_amop_opr_fam_index | i | 5 | 40 kB | 0 | 10
pg_amop_oid_index | i | 5 | 40 kB | 0 | 10
pg_operator_oprname_l_r_n_index | i | 5 | 40 kB | 0 | 10
pg_type_oid_index | i | 5 | 40 kB | 0 | 10
pg_operator_oid_index | i | 5 | 40 kB | 0 | 10
pg_collation_oid_index | i | 5 | 40 kB | 0 | 10
pg_amop_fam_strat_index | i | 5 | 40 kB | 0 | 10
pg_cast_source_target_index | i | 4 | 32 kB | 0 | 10
pg_ts_config_map_index | i | 4 | 32 kB | 0 | 10
pg_toast_2618_index | i | 4 | 32 kB | 0 | 10
pg_cast_oid_index | i | 4 | 32 kB | 0 | 10
pg_rewrite_rel_rulename_index | i | 4 | 32 kB | 0 | 10
pg_statistic_relid_kind_att_inh_index | i | 4 | 32 kB | 0 | 10
pg_amproc_oid_index | i | 4 | 32 kB | 0 | 10
pg_amproc_fam_proc_index | i | 4 | 32 kB | 0 | 10
pg_opclass | r | 3 | 24 kB | 0 | 10
pg_amproc | r | 3 | 24 kB | 0 | 10
pg_conversion | r | 3 | 24 kB | 0 | 10
pg_cast | r | 3 | 24 kB | 0 | 10
pg_aggregate_fnoid_index | i | 2 | 16 kB | 0 | 10
pg_toast_2619_index | i | 2 | 16 kB | 0 | 10
pg_ts_dict_dictname_index | i | 2 | 16 kB | 0 | 10
pg_ts_dict_oid_index | i | 2 | 16 kB | 0 | 10
pg_attrdef_adrelid_adnum_index | i | 2 | 16 kB | 0 | 10
pg_attrdef_oid_index | i | 2 | 16 kB | 0 | 10
pg_constraint_conname_nsp_index | i | 2 | 16 kB | 0 | 10
pg_constraint_conrelid_index | i | 2 | 16 kB | 0 | 10
pg_constraint_contypid_index | i | 2 | 16 kB | 0 | 10
pg_constraint_oid_index | i | 2 | 16 kB | 0 | 10
pg_index_indrelid_index | i | 2 | 16 kB | 0 | 10
pg_index_indexrelid_index | i | 2 | 16 kB | 0 | 10
pg_opfamily | r | 2 | 16 kB | 0 | 10
pg_opfamily_am_name_nsp_index | i | 2 | 16 kB | 0 | 10
pg_opfamily_oid_index | i | 2 | 16 kB | 0 | 10
pg_opclass_am_name_nsp_index | i | 2 | 16 kB | 0 | 10
pg_opclass_oid_index | i | 2 | 16 kB | 0 | 10
pg_am_name_index | i | 2 | 16 kB | 0 | 10
pg_am_oid_index | i | 2 | 16 kB | 0 | 10
pg_language_name_index | i | 2 | 16 kB | 0 | 10
pg_language_oid_index | i | 2 | 16 kB | 0 | 10
pg_aggregate | r | 2 | 16 kB | 0 | 10
streaming_gather_agg_index | i | 2 | 16 kB | 0 | 10
pg_rewrite_oid_index | i | 2 | 16 kB | 0 | 10
pg_namespace_nspname_index | i | 2 | 16 kB | 0 | 10
pg_namespace_oid_index | i | 2 | 16 kB | 0 | 10
pg_conversion_default_index | i | 2 | 16 kB | 0 | 10
pg_conversion_name_nsp_index | i | 2 | 16 kB | 0 | 10
pg_conversion_oid_index | i | 2 | 16 kB | 0 | 10
pg_ts_config_cfgname_index | i | 2 | 16 kB | 0 | 10
pg_ts_config_oid_index | i | 2 | 16 kB | 0 | 10
pg_ts_config_map | r | 2 | 16 kB | 0 | 10
pg_ts_parser_prsname_index | i | 2 | 16 kB | 0 | 10
pg_ts_parser_oid_index | i | 2 | 16 kB | 0 | 10
pg_ts_template_tmplname_index | i | 2 | 16 kB | 0 | 10
pg_ts_template_oid_index | i | 2 | 16 kB | 0 | 10
pg_extension_oid_index | i | 2 | 16 kB | 0 | 10
pg_extension_name_index | i | 2 | 16 kB | 0 | 10
pg_foreign_data_wrapper_oid_index | i | 2 | 16 kB | 0 | 10
pg_foreign_data_wrapper_name_index | i | 2 | 16 kB | 0 | 10
pg_foreign_server_oid_index | i | 2 | 16 kB | 0 | 10
pg_foreign_server_name_index | i | 2 | 16 kB | 0 | 10
pg_range_rngtypid_index | i | 2 | 16 kB | 0 | 10
pg_toast_12360_index | i | 1 | 8192 bytes | 0 | 10
pg_toast_12346_index | i | 1 | 8192 bytes | 0 | 10
pg_toast_12310_index | i | 1 | 8192 bytes | 0 | 10
pg_synonym_oid_index | i | 1 | 8192 bytes | 0 | 10
pg_directory_oid_index | i | 1 | 8192 bytes | 0 | 10
pg_directory_name_index | i | 1 | 8192 bytes | 0 | 10
pg_toast_9026_index | i | 1 | 8192 bytes | 0 | 10
pg_hashbucket_oid_index | i | 1 | 8192 bytes | 0 | 10
pg_hashbucket_bid_index | i | 1 | 8192 bytes | 0 | 10
streaming_stream_oid_index | i | 1 | 8192 bytes | 0 | 10
streaming_stream_relid_index | i | 1 | 8192 bytes | 0 | 10
streaming_cont_query_relid_index | i | 1 | 8192 bytes | 0 | 10
streaming_cont_query_defrelid_index | i | 1 | 8192 bytes | 0 | 10
streaming_cont_query_id_index | i | 1 | 8192 bytes | 0 | 10
streaming_cont_query_oid_index | i | 1 | 8192 bytes | 0 | 10
streaming_cont_query_matrelid_index | i | 1 | 8192 bytes | 0 | 10
streaming_cont_query_lookupidxid_index | i | 1 | 8192 bytes | 0 | 10
streaming_cont_query_schema_change_index | i | 1 | 8192 bytes | 0 | 10
streaming_reaper_status_id_index | i | 1 | 8192 bytes | 0 | 10
streaming_reaper_status_oid_index | i | 1 | 8192 bytes | 0 | 10
gs_matview_oid_index | i | 1 | 8192 bytes | 0 | 10
gs_matviewdep_oid_index | i | 1 | 8192 bytes | 0 | 10
pgxc_slice_relid_index | i | 1 | 8192 bytes | 0 | 10
pgxc_slice_order_index | i | 1 | 8192 bytes | 0 | 10
gs_opt_model_name_index | i | 1 | 8192 bytes | 0 | 10
pg_largeobject_loid_pn_index | i | 1 | 8192 bytes | 0 | 10
pg_user_mapping_user_server_index | i | 1 | 8192 bytes | 0 | 10
pg_toast_9016_index | i | 1 | 8192 bytes | 0 | 10
pg_partition_reloid_index | i | 1 | 8192 bytes | 0 | 10
pg_partition_parentoid_index | i | 1 | 8192 bytes | 0 | 10
pg_partition_indextblid_index | i | 1 | 8192 bytes | 0 | 10
pg_partition_partoid_index | i | 1 | 8192 bytes | 0 | 10
pg_attrdef | r | 1 | 8192 bytes | 0 | 10
pg_toast_2604_index | i | 1 | 8192 bytes | 0 | 10
gs_auditing_policy_oid_index | i | 1 | 8192 bytes | 0 | 10
pg_constraint | r | 1 | 8192 bytes | 0 | 10
pg_toast_2606_index | i | 1 | 8192 bytes | 0 | 10
gs_auditing_policy_name_index | i | 1 | 8192 bytes | 0 | 10
gs_auditing_policy_access_oid_index | i | 1 | 8192 bytes | 0 | 10
gs_auditing_policy_access_row_index | i | 1 | 8192 bytes | 0 | 10
pg_inherits_parent_index | i | 1 | 8192 bytes | 0 | 10
pg_inherits_relid_seqno_index | i | 1 | 8192 bytes | 0 | 10
pg_user_mapping_oid_index | i | 1 | 8192 bytes | 0 | 10
gs_auditing_policy_filters_oid_index | i | 1 | 8192 bytes | 0 | 10
pg_statistic_ext_relid_kind_inh_key_index | i | 1 | 8192 bytes | 0 | 10
gs_auditing_policy_filters_row_index | i | 1 | 8192 bytes | 0 | 10
gs_auditing_policy_privileges_oid_index | i | 1 | 8192 bytes | 0 | 10
pg_toast_12332_index | i | 1 | 8192 bytes | 0 | 10
gs_auditing_policy_privileges_row_index | i | 1 | 8192 bytes | 0 | 10
pg_am | r | 1 | 8192 bytes | 0 | 10
gs_policy_label_oid_index | i | 1 | 8192 bytes | 0 | 10
gs_policy_label_name_index | i | 1 | 8192 bytes | 0 | 10
statement_history_time_idx | i | 1 | 8192 bytes | 0 | 10
pg_language | r | 1 | 8192 bytes | 0 | 10
gs_masking_policy_oid_index | i | 1 | 8192 bytes | 0 | 10
pg_largeobject_metadata_oid_index | i | 1 | 8192 bytes | 0 | 10
gs_masking_policy_name_index | i | 1 | 8192 bytes | 0 | 10
pg_toast_12300_index | i | 1 | 8192 bytes | 0 | 10
pg_toast_12286_index | i | 1 | 8192 bytes | 0 | 10
gs_masking_policy_actions_oid_index | i | 1 | 8192 bytes | 0 | 10
pg_toast_2620_index | i | 1 | 8192 bytes | 0 | 10
pg_trigger_tgconstraint_index | i | 1 | 8192 bytes | 0 | 10
pg_trigger_tgrelid_tgname_index | i | 1 | 8192 bytes | 0 | 10
pg_trigger_oid_index | i | 1 | 8192 bytes | 0 | 10
pg_toast_2609_index | i | 1 | 8192 bytes | 0 | 10
pg_toast_12001_index | i | 1 | 8192 bytes | 0 | 10
pg_toast_11995_index | i | 1 | 8192 bytes | 0 | 10
pg_enum_oid_index | i | 1 | 8192 bytes | 0 | 10
pg_enum_typid_label_index | i | 1 | 8192 bytes | 0 | 10
pg_enum_typid_sortorder_index | i | 1 | 8192 bytes | 0 | 10
pg_namespace | r | 1 | 8192 bytes | 0 | 10
gs_masking_policy_actions_row_index | i | 1 | 8192 bytes | 0 | 10
gs_masking_policy_actions_policy_oid_index | i | 1 | 8192 bytes | 0 | 10
gs_masking_policy_filters_oid_index | i | 1 | 8192 bytes | 0 | 10
gs_masking_policy_filters_row_index | i | 1 | 8192 bytes | 0 | 10
pg_toast_11988_index | i | 1 | 8192 bytes | 0 | 10
pg_toast_1255_index | i | 1 | 8192 bytes | 0 | 10
pg_ts_config | r | 1 | 8192 bytes | 0 | 10
pg_toast_14458_index | i | 1 | 8192 bytes | 0 | 10
sql_implementation_info | r | 1 | 8192 bytes | 0 | 10
pg_toast_3220_index | i | 1 | 8192 bytes | 0 | 10
pg_ts_parser | r | 1 | 8192 bytes | 0 | 10
pg_toast_14463_index | i | 1 | 8192 bytes | 0 | 10
sql_languages | r | 1 | 8192 bytes | 0 | 10
pg_ts_template | r | 1 | 8192 bytes | 0 | 10
pg_toast_14468_index | i | 1 | 8192 bytes | 0 | 10
sql_packages | r | 1 | 8192 bytes | 0 | 10
pg_extension | r | 1 | 8192 bytes | 0 | 10
pg_toast_14473_index | i | 1 | 8192 bytes | 0 | 10
sql_parts | r | 1 | 8192 bytes | 0 | 10
pg_foreign_data_wrapper | r | 1 | 8192 bytes | 0 | 10
pg_toast_14478_index | i | 1 | 8192 bytes | 0 | 10
sql_sizing | r | 1 | 8192 bytes | 0 | 10
pg_foreign_server | r | 1 | 8192 bytes | 0 | 10
pg_toast_14483_index | i | 1 | 8192 bytes | 0 | 10
pg_toast_9001_index | i | 1 | 8192 bytes | 0 | 10
pgxc_class_pcrelid_index | i | 1 | 8192 bytes | 0 | 10
pg_foreign_table_relid_index | i | 1 | 8192 bytes | 0 | 10
pg_toast_3254_index | i | 1 | 8192 bytes | 0 | 10
pg_rlspolicy_oid_index | i | 1 | 8192 bytes | 0 | 10
pg_rlspolicy_polrelid_polname_index | i | 1 | 8192 bytes | 0 | 10
pg_default_acl_role_nsp_obj_index | i | 1 | 8192 bytes | 0 | 10
pg_default_acl_oid_index | i | 1 | 8192 bytes | 0 | 10
pg_toast_3596_index | i | 1 | 8192 bytes | 0 | 10
pg_seclabel_object_index | i | 1 | 8192 bytes | 0 | 10
student_sname_key | i | 1 | 16 kB | 0 | 16632
pg_ts_dict | r | 1 | 8192 bytes | 0 | 10
student_pkey | i | 1 | 16 kB | 0 | 16632
pg_range | r | 1 | 8192 bytes | 0 | 10
pg_toast_14488_index | i | 1 | 8192 bytes | 0 | 10
gs_encrypted_columns_oid_index | i | 1 | 8192 bytes | 0 | 10
gs_encrypted_columns_rel_id_column_name_index | i | 1 | 8192 bytes | 0 | 10
gs_column_keys_oid_index | i | 1 | 8192 bytes | 0 | 10
gs_column_keys_name_index | i | 1 | 8192 bytes | 0 | 10
gs_column_keys_distributed_id_index | i | 1 | 8192 bytes | 0 | 10
gs_column_keys_args_oid_index | i | 1 | 8192 bytes | 0 | 10
gs_client_global_keys_oid_index | i | 1 | 8192 bytes | 0 | 10
gs_client_global_keys_name_index | i | 1 | 8192 bytes | 0 | 10
gs_client_global_keys_args_oid_index | i | 1 | 8192 bytes | 0 | 10
gs_asp_sampletime_index | i | 1 | 8192 bytes | 0 | 10
pg_object_index | i | 1 | 16 kB | 0 | 10
pg_synonym_name_nsp_index | i | 1 | 8192 bytes | 0 | 10
gs_wlm_plan_encoding_table | r | 0 | 0 bytes | 0 | 10
plan_table_data | r | 0 | 0 bytes | 0 | 10
gs_masking_policy | r | 0 | 0 bytes | 0 | 10
gs_column_keys_args | r | 0 | 0 bytes | 0 | 10
pg_largeobject_metadata | r | 0 | 0 bytes | 0 | 10
pg_obsscaninfo | r | 0 | 0 bytes | 0 | 10
gs_opt_model | r | 0 | 0 bytes | 0 | 10
gs_client_global_keys | r | 0 | 0 bytes | 0 | 10
gs_masking_policy_actions | r | 0 | 0 bytes | 0 | 10
gs_wlm_plan_operator_info | r | 0 | 0 bytes | 0 | 10
gs_auditing_policy | r | 0 | 0 bytes | 0 | 10
gs_wlm_ec_operator_info | r | 0 | 0 bytes | 0 | 10
gs_wlm_operator_info | r | 0 | 0 bytes | 0 | 10
pg_trigger | r | 0 | 0 bytes | 0 | 10
gs_client_global_keys_args | r | 0 | 0 bytes | 0 | 10
sql_sizing_profiles | r | 0 | 0 bytes | 0 | 10
pgxc_class | r | 0 | 0 bytes | 0 | 10
gs_auditing_policy_privileges | r | 0 | 0 bytes | 0 | 10
pg_user_mapping | r | 0 | 0 bytes | 0 | 10
gs_asp | r | 0 | 0 bytes | 0 | 10
gs_wlm_user_resource_history | r | 0 | 0 bytes | 0 | 10
pg_foreign_table | r | 0 | 0 bytes | 0 | 10
gs_wlm_session_query_info_all | r | 0 | 0 bytes | 0 | 10
pg_partition | r | 0 | 0 bytes | 0 | 10
pg_enum | r | 0 | 0 bytes | 0 | 10
pg_rlspolicy | r | 0 | 0 bytes | 0 | 10
pg_object | r | 0 | 8192 bytes | 0 | 10
gs_auditing_policy_filters | r | 0 | 0 bytes | 0 | 10
pg_synonym | r | 0 | 0 bytes | 0 | 10
pg_default_acl | r | 0 | 0 bytes | 0 | 10
streaming_reaper_status | r | 0 | 0 bytes | 0 | 10
gs_wlm_instance_history | r | 0 | 0 bytes | 0 | 10
gs_masking_policy_filters | r | 0 | 0 bytes | 0 | 10
gs_policy_label | r | 0 | 0 bytes | 0 | 10
pg_seclabel | r | 0 | 0 bytes | 0 | 10
pg_directory | r | 0 | 0 bytes | 0 | 10
pg_statistic_ext | r | 0 | 0 bytes | 0 | 10
gs_auditing_policy_access | r | 0 | 0 bytes | 0 | 10
gs_matview | r | 0 | 0 bytes | 0 | 10
student | r | 0 | 8192 bytes | 0 | 16632
pg_hashbucket | r | 0 | 0 bytes | 0 | 10
statement_history | r | 0 | 0 bytes | 0 | 10
gs_matview_dependency | r | 0 | 0 bytes | 0 | 10
pg_largeobject | r | 0 | 0 bytes | 0 | 10
gs_encrypted_columns | r | 0 | 0 bytes | 0 | 10
streaming_stream | r | 0 | 0 bytes | 0 | 10
pgxc_slice | r | 0 | 0 bytes | 0 | 10
gs_column_keys | r | 0 | 0 bytes | 0 | 10
pg_inherits | r | 0 | 0 bytes | 0 | 10
streaming_cont_query | r | 0 | 0 bytes | 0 | 10
(259 rows)
复制或者
with objectInDefaultTS as
( select relname, relkind, relpages,pg_size_pretty(pg_relation_size(a.oid)),
reltablespace,relowner
from pg_class a
where a.relkind in ('r', 'i') and reltablespace='0'
)
select *
from objectInDefaultTS
where relname not like 'pg_%' and relname not like 'gs_%' and relname not like 'sql_%'
order by relpages desc;复制
4、查看数据库在非默认表空间下有哪些对象：
--执行下面的SQL语句，查询数据库test的非默认表空间t_tbspace下有哪些对象：
select relname,relkind,relpages,pg_size_pretty(pg_relation_size(a.oid)),
reltablespace,relowner
from pg_class a, pg_tablespace tb
where a.relkind in ('r', 'i')
and a.reltablespace=tb.oid
and tb.spcname='t_tbspace'
order by a.relpages desc;复制
5、重命名表空间：
--命名表空间t_tbspace为app_tbs
ALTER TABLESPACE t_tbspace RENAME TO app_tbs;
复制
--执行下面的gsql命令，查看数据库当前的表空间信息：
\db复制
可以看到表空间的名字已经被修改。
6、删除表空间：
用户必须是表空间的owner或者系统管理员才能删除表空间。需要先删除表空间的对象，再删除表空间app_ts：
drop table test.t1 ;
DROP TABLESPACE app_tbs;复制
成功删除
二、心得体会
通过第10天的学习，我掌握了表空间的管理，包括创建表空间、删除表空间、重命名表空间、查看表空间的情况，对opengauss数据库表空间的认识有了提升。
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2年前
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作业审核合格，一起参与21天openGauss学习打卡活动！
活动详情：https://www.modb.pro/db/5516192年前
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