Postgres support (COMMENT)

[nene]

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