COMMENT ON {
    COLUMN [ owner.]table-name.column-name
   | DBSPACE dbspace-name
   | EVENT [ owner.]event-name
   | EXTERNAL ENVIRONMENT environment-name
   | EXTERNAL [ ENVIRONMENT ] OBJECT object-name
   | FOREIGN KEY [ owner.]table-name.role-name
   | INDEX [ [ owner.] table.]index-name
   | INTEGRATED LOGIN integrated-login-id
   | JAVA CLASS java-class-name
   | JAVA JAR java-jar-name
   | KERBEROS LOGIN "client-Kerberos-principal"
   | LOGIN POLICY policy-name
   | MATERIALIZED VIEW [ owner.]materialized-view-name
   | MIRROR SERVER mirror-server-name
   | PRIMARY KEY ON [ owner.]table-name
   | PROCEDURE [ owner.]procedure-name
   | SEQUENCE sequence-name
   | SERVICE web-service-name
   | SPATIAL REFERENCE SYSTEM srs-name 
   | SPATIAL UNIT OF MEASURE uom-identifier 
   | TABLE [ owner.]table-name
   | TEXT CONFIGURATION [ owner.]text-config-name
   | TEXT INDEX text-index-name ON [ owner.]table-name
   | TRIGGER [ [ owner.]tablename.]trigger-name
   | USER userid
   | VIEW [ owner.]view-name
}
IS comment

comment : string | NULL

environment-name : 
JAVA
| PERL
| PHP
| CLR
| C_ESQL32
| C_ESQL64
| C_ODBC32
| C_ODBC64

The COMMENT statement allows you to set a remark (comment) for an object in the database. The COMMENT statement updates remarks listed in the ISYSREMARKS system table. You can remove a comment by setting it to NULL. For a comment on an index or trigger, the owner of the comment is the owner of the table on which the index or trigger is defined.

You cannot add comments for local temporary tables.

If you use the Database Documentation Wizard to document your SQL Anywhere database, you have the option to include the comments for procedures, functions, triggers, events, and views in the output. See Documenting a database.

Must either be the owner of the database object being commented, or have DBA authority.

Automatic commit.

The following examples show how to add and remove a comment.

To view the comment set for an object, use a SELECT statement similar to the following. This example retrieves the comment set for the ViewSalesOrders view in the SQL Anywhere sample database.

SELECT remarks 
FROM SYSTAB t, SYSREMARK r 
WHERE t.object_id = r.object_id 
AND t.table_name = 'ViewSalesOrders';