Postgresql 中文操作指南
53.19. pg_description #
pg_description 目录存储每个数据库对象的可选描述（注释）。可以使用 COMMENT 命令处理描述，并使用 psql 的 \d 命令查看描述。 pg_description 初始内容中提供了许多内置系统对象的描述。
The catalog pg_description stores optional descriptions (comments) for each database object. Descriptions can be manipulated with the COMMENT command and viewed with psql’s \d commands. Descriptions of many built-in system objects are provided in the initial contents of pg_description.
另请参见 pg_shdescription ，它对涉及跨数据库集群共享对象的描述执行类似功能。
See also pg_shdescription, which performs a similar function for descriptions involving objects that are shared across a database cluster.
Table 53.19. pg_description Columns
Table 53.19. pg_description Columns
Column Type Description |
objoid oid (references any OID column) The OID of the object this description pertains to |
classoid oid (references pg_class.oid) The OID of the system catalog this object appears in |
objsubid int4 For a comment on a table column, this is the column number (the objoid and classoid refer to the table itself). For all other object types, this column is zero. |
description text Arbitrary text that serves as the description of this object |