第 51 章 系统目录
目录
- 51.1. 概述
- 51.2.
pg_aggregate - 51.3.
pg_am - 51.4.
pg_amop - 51.5.
pg_amproc - 51.6.
pg_attrdef - 51.7.
pg_attribute - 51.8.
pg_authid - 51.9.
pg_auth_members - 51.10.
pg_cast - 51.11.
pg_class - 51.12.
pg_collation - 51.13.
pg_constraint - 51.14.
pg_conversion - 51.15.
pg_database - 51.16.
pg_db_role_setting - 51.17.
pg_default_acl - 51.18.
pg_depend - 51.19.
pg_description - 51.20.
pg_enum - 51.21.
pg_event_trigger - 51.22.
pg_extension - 51.23.
pg_foreign_data_wrapper - 51.24.
pg_foreign_server - 51.25.
pg_foreign_table - 51.26.
pg_index - 51.27.
pg_inherits - 51.28.
pg_init_privs - 51.29.
pg_language - 51.30.
pg_largeobject - 51.31.
pg_largeobject_metadata - 51.32.
pg_namespace - 51.33.
pg_opclass - 51.34.
pg_operator - 51.35.
pg_opfamily - 51.36.
pg_parameter_acl - 51.37.
pg_partitioned_table - 51.38.
pg_policy - 51.39.
pg_proc - 51.40.
pg_publication - 51.41.
pg_publication_namespace - 51.42.
pg_publication_rel - 51.43.
pg_range - 51.44.
pg_replication_origin - 51.45.
pg_rewrite - 51.46.
pg_seclabel - 51.47.
pg_sequence - 51.48.
pg_shdepend - 51.49.
pg_shdescription - 51.50.
pg_shseclabel - 51.51.
pg_statistic - 51.52.
pg_statistic_ext - 51.53.
pg_statistic_ext_data - 51.54.
pg_subscription - 51.55.
pg_subscription_rel - 51.56.
pg_tablespace - 51.57.
pg_transform - 51.58.
pg_trigger - 51.59.
pg_ts_config - 51.60.
pg_ts_config_map - 51.61.
pg_ts_dict - 51.62.
pg_ts_parser - 51.63.
pg_ts_template - 51.64.
pg_type - 51.65.
pg_user_mapping
系统目录是关系型数据库管理系统存放模式元数据的地方，例如表和列的信息以及内部记账信息。PostgreSQL 的系统目录是普通表。你可以删除并重建这些表、增加列、插入和更新值，并借此把系统严重搞坏。通常，不应手工修改系统目录，通常都有 SQL 命令可用于完成这些操作。（例如，CREATE DATABASE 会向 pg_database 目录中插入一行 — 并且实际上会在磁盘上创建该数据库。）对于某些特别深奥的操作，确实存在少数例外，但随着时间推移，其中很多也已经可以通过 SQL 命令完成，因此直接操纵系统目录的需求正越来越少。
报告文档问题
阅读 上游文档. 通过 PostgreSQL 文档反馈表单.