COMMENT ON {
    ACCESS METHOD $object_name$ |
    AGGREGATE $aggregate_name$ ( $aggregate_signature$ ) |
    CAST ($source_type$ AS $target_type$) |
    COLLATION $object_name$ |
    COLUMN $relation_name$.$column_name$ |
    CONSTRAINT $constraint_name$ ON $table_name$ |
    CONSTRAINT $constraint_name$ ON DOMAIN $domain_name$ |
    CONVERSION $object_name$ |
    DATABASE $object_name$ |
    DOMAIN $object_name$ |
    EXTENSION $object_name$ |
    EVENT TRIGGER $object_name$ |
    FOREIGN DATA WRAPPER $object_name$ |
    FOREIGN TABLE $object_name$ |
    FUNCTION $function_name$ [ ( [ { [ $routine_argmode$ ] [ $argname$ ] $argtype$ } [ , ... ] ] ) ] |
    INDEX $object_name$ |
    LARGE OBJECT $large_object_oid$ |
    MATERIALIZED VIEW $object_name$ |
    OPERATOR $operator_name$ ($left_type$, $right_type$) |
    OPERATOR CLASS $object_name$ USING $index_method$ |
    OPERATOR FAMILY $object_name$ USING $index_method$ |
    POLICY $policy_name$ ON $table_name$ |
    [ PROCEDURAL ] LANGUAGE $object_name$ |
    PROCEDURE $procedure_name$ [ ( [ { [ $routine_argmode$ ] [ $argname$ ] $argtype$ } [ , ... ] ] ) ] |
    PUBLICATION $object_name$ |
    ROLE $object_name$ |
    ROUTINE $routine_name$ [ ( [ { [ $routine_argmode$ ] [ $argname$ ] $argtype$ } [ , ... ] ] ) ] |
    RULE $rule_name$ ON $table_name$ |
    SCHEMA $object_name$ |
    SEQUENCE $object_name$ |
    SERVER $object_name$ |
    STATISTICS $object_name$ |
    SUBSCRIPTION $object_name$ |
    TABLE $object_name$ |
    TABLESPACE $object_name$ |
    TEXT SEARCH CONFIGURATION $object_name$ |
    TEXT SEARCH DICTIONARY $object_name$ |
    TEXT SEARCH PARSER $object_name$ |
    TEXT SEARCH TEMPLATE $object_name$ |
    TRANSFORM FOR $type_name$ LANGUAGE $lang_name$ |
    TRIGGER $trigger_name$ ON $table_name$ |
    TYPE $object_name$ |
    VIEW $object_name$ } IS { $string_literal$ | NULL }

where $aggregate_signature$ is:

* |
    { [ $agg_argmode$ ] [ $argname$ ] $argtype$ } [ , ... ] |
    [ { [ $agg_argmode$ ] [ $argname$ ] $argtype$ } [ , ... ] ] ORDER BY { [ $agg_argmode$ ] [ $argname$ ] $argtype$ } [ , ... ]