Полезная информация

3.7. pg_description

The pg_description table can store an optional description or comment for each database object. Descriptions can be manipulated with the COMMENT command. Client applications can view the descriptions by joining with this table. Many built-in system objects have comments associated with them that are shown by psql's \d commands.

Table 3-7. pg_description Columns

NameTypeReferencesDescription
objoidoidany oid attributeThe oid of the object this description pertains to
classoidoidpg_class.oidThe oid of the system catalog this object appears in
objsubidint4 For a comment on a table attribute, this is the attribute's column number (the objoid and classoid refer to the table itself). For all other object types, this field is presently zero.
descriptiontext Arbitrary text that serves as the description of this object.