Postgres support (COMMENT)

[nene]

• COMMENT ON ... IS { string_literal | NULL }
  • ACCESS METHOD object_name
  • AGGREGATE aggregate_name ( aggregate_signature ), where aggregate_signature is:
    • *
    • [ argmode ] [ argname ] argtype [ , ... ]
    • [ [ argmode ] [ argname ] argtype [ , ... ] ] ORDER BY [ argmode ] [ argname ] argtype [ , ... ]
  • 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 ()
  • FUNCTION function_name [ ( [ [ 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 [ ( [ [ argmode ] [ argname ] argtype [, ...] ] ) ]
  • PUBLICATION object_name
  • ROLE object_name
  • ROUTINE routine_name [ ( [ [ 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