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阿里云PostgreSQL 问题报告 纠错本页面

章 48. 系统表

目录
48.1. 概述
48.2. pg_aggregate
48.3. pg_am
48.4. pg_amop
48.5. pg_amproc
48.6. pg_attrdef
48.7. pg_attribute
48.8. pg_authid
48.9. pg_auth_members
48.10. pg_cast
48.11. pg_class
48.12. pg_collation
48.13. pg_constraint
48.14. pg_conversion
48.15. pg_database
48.16. pg_db_role_setting
48.17. pg_default_acl
48.18. pg_depend
48.19. pg_description
48.20. pg_enum
48.21. pg_event_trigger
48.22. pg_extension
48.23. pg_foreign_data_wrapper
48.24. pg_foreign_server
48.25. pg_foreign_table
48.26. pg_index
48.27. pg_inherits
48.28. pg_language
48.29. pg_largeobject
48.30. pg_largeobject_metadata
48.31. pg_namespace
48.32. pg_opclass
48.33. pg_operator
48.34. pg_opfamily
48.35. pg_pltemplate
48.36. pg_proc
48.37. pg_range
48.38. pg_rewrite
48.39. pg_replication_slots
48.40. pg_seclabel
48.41. pg_shdepend
48.42. pg_shdescription
48.43. pg_shseclabel
48.44. pg_statistic
48.45. pg_tablespace
48.46. pg_trigger
48.47. pg_ts_config
48.48. pg_ts_config_map
48.49. pg_ts_dict
48.50. pg_ts_parser
48.51. pg_ts_template
48.52. pg_type
48.53. pg_user_mapping
48.54. 系统视图
48.55. pg_available_extensions
48.56. pg_available_extension_versions
48.57. pg_cursors
48.58. pg_group
48.59. pg_indexes
48.60. pg_locks
48.61. pg_matviews
48.62. pg_prepared_statements
48.63. pg_prepared_xacts
48.64. pg_roles
48.65. pg_rules
48.66. pg_seclabels
48.67. pg_settings
48.68. pg_shadow
48.69. pg_stats
48.70. pg_tables
48.71. pg_timezone_abbrevs
48.72. pg_timezone_names
48.73. pg_user
48.74. pg_user_mappings
48.75. pg_views

系统表是关系型数据库管理系统存放结构元数据的地方,比如表和字段以及内部登记信息等。 PostgreSQL的系统表就是普通表。你可以删除然后重建这些表、 增加列、插入和更新数值,然后彻底把系统搞垮。不应该手工修改系统表, 通常总有 SQL 命令可以做这些事情。比如,CREATE DATABASEpg_database表插入一行,并且实际上在磁盘上创建该数据库。 有几种特别深奥的操作例外,比如增加索引访问方法。

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