COMMENT ON SEQUENCE
Adds, revises, or removes a comment on a sequence. Each object can have one comment. Comments are stored in the system table COMMENTS
.
Syntax
COMMENT ON SEQUENCE [schema.]sequence-name IS { 'comment' | NULL }
Parameters
schema
|
Specifies a schema. If multiple schemas are defined in the database, include the schema name. For example: myschema.thisDbObject |
sequence-name |
The name of the sequence associated with the comment. |
comment |
Specifies the text of the comment to add. If a comment already exists for this sequence, this comment overwrites the previous one. 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. You can enclose a blank value within single quotes to remove an existing comment. |
NULL |
Removes an existing comment. |
Privileges
- Superuser: View and add comments to all objects.
- Object owner: Add or edit comments for the object.
- User: VIEW privileges on an object to view its comments.
Examples
The following example adds a comment to the sequence called prom_seq.
=> COMMENT ON SEQUENCE prom_seq IS 'Promotion codes';
The following examples remove a comment from the prom_seq sequence.
=> COMMENT ON SEQUENCE prom_seq IS NULL; => COMMENT ON SEQUENCE prom_seq IS '';