COMMENT ON TABLE

Adds, revises, or removes a comment on a table.

Adds, revises, or removes a comment on a table. Each object can have one comment. Comments are stored in the system table COMMENTS.

Syntax

COMMENT ON TABLE [[database.]schema.]table IS { 'comment' | NULL }

Parameters

[database.]schema

Database and schema. The default schema is public. If you specify a database, it must be the current database.

table
The name of the table with which to associate the comment.
comment
Specifies the text of the comment to add. Enclose the text of the comment within single-quotes. If a comment already exists for this table, the comment you enter here overwrites the previous comment.

Comments can be up to 8192 characters in length. If a comment exceeds that limitation, Vertica truncates the comment and alerts the user with a message.

NULL
Removes a previously added comment.

Privileges

Non-superuser: object owner

Examples

The following example adds a comment to the promotion_dimension table:

=> COMMENT ON TABLE promotion_dimension IS '2011 Promotions';

The following example removes a comment from the promotion_dimension table:

=> COMMENT ON TABLE promotion_dimension IS NULL;