1.1 --- a/core.sql	Thu Feb 21 17:13:00 2013 +0100
     1.2 +++ b/core.sql	Thu Feb 21 18:03:15 2013 +0100
     1.3 @@ -2726,6 +2726,7 @@
     1.4  -- Transaction isolation --
     1.5  ---------------------------
     1.6  
     1.7 +
     1.8  CREATE FUNCTION "require_transaction_isolation"()
     1.9    RETURNS VOID
    1.10    LANGUAGE 'plpgsql' VOLATILE AS $$
    1.11 @@ -2740,6 +2741,8 @@
    1.12      END;
    1.13    $$;
    1.14  
    1.15 +COMMENT ON FUNCTION "require_transaction_isolation"() IS 'Throws an exception, if transaction isolation level is too low to provide a consistent snapshot';
    1.16 +
    1.17  
    1.18  CREATE FUNCTION "dont_require_transaction_isolation"()
    1.19    RETURNS VOID
    1.20 @@ -2756,6 +2759,8 @@
    1.21      END;
    1.22    $$;
    1.23  
    1.24 +COMMENT ON FUNCTION "dont_require_transaction_isolation"() IS 'Raises a warning, if transaction isolation level is higher than READ COMMITTED';
    1.25 +
    1.26  
    1.27  
    1.28  ------------------------------------------------------------------------