作者在 2023-05-25 11:30:19 发布以下内容
章 47. 系统表
- 目录
- 47.1. 概述
- 47.2. pg_aggregate
- 47.3. pg_am
- 47.4. pg_amop
- 47.5. pg_amproc
- 47.6. pg_attrdef
- 47.7. pg_attribute
- 47.8. pg_authid
- 47.9. pg_auth_members
- 47.10. pg_cast
- 47.11. pg_class
- 47.12. pg_event_trigger
- 47.13. pg_constraint
- 47.14. pg_collation
- 47.15. pg_conversion
- 47.16. pg_database
- 47.17. pg_db_role_setting
- 47.18. pg_default_acl
- 47.19. pg_depend
- 47.20. pg_description
- 47.21. pg_enum
- 47.22. pg_extension
- 47.23. pg_foreign_data_wrapper
- 47.24. pg_foreign_server
- 47.25. pg_foreign_table
- 47.26. pg_index
- 47.27. pg_inherits
- 47.28. pg_language
- 47.29. pg_largeobject
- 47.30. pg_largeobject_metadata
- 47.31. pg_namespace
- 47.32. pg_opclass
- 47.33. pg_operator
- 47.34. pg_opfamily
- 47.35. pg_pltemplate
- 47.36. pg_proc
- 47.37. pg_range
- 47.38. pg_rewrite
- 47.39. pg_seclabel
- 47.40. pg_shdepend
- 47.41. pg_shdescription
- 47.42. pg_shseclabel
- 47.43. pg_statistic
- 47.44. pg_tablespace
- 47.45. pg_trigger
- 47.46. pg_ts_config
- 47.47. pg_ts_config_map
- 47.48. pg_ts_dict
- 47.49. pg_ts_parser
- 47.50. pg_ts_template
- 47.51. pg_type
- 47.52. pg_user_mapping
- 47.53. 系统视图
- 47.54. pg_available_extensions
- 47.55. pg_available_extension_versions
- 47.56. pg_cursors
- 47.57. pg_group
- 47.58. pg_indexes
- 47.59. pg_locks
- 47.60. pg_matviews
- 47.61. pg_prepared_statements
- 47.62. pg_prepared_xacts
- 47.63. pg_roles
- 47.64. pg_rules
- 47.65. pg_seclabels
- 47.66. pg_settings
- 47.67. pg_shadow
- 47.68. pg_stats
- 47.69. pg_tables
- 47.70. pg_timezone_abbrevs
- 47.71. pg_timezone_names
- 47.72. pg_user
- 47.73. pg_user_mappings
- 47.74. 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 DATABASE 向pg_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。