Chapter 47. 系统表
Table of Contents
- 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。