CREATE OR REPLACE FUNCTION ifnull(value anyelement, null_ anyelement)
  RETURNS anyelement AS
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SELECT util.ifnull($1, $2)
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  LANGUAGE sql IMMUTABLE
  COST 100;
COMMENT ON FUNCTION ifnull(anyelement, anyelement) IS '
wrapper that prevents views from getting dropped when the util schema is reinstalled
';

CREATE OR REPLACE FUNCTION is_castable(value text, ret_type_null anyelement)
  RETURNS boolean AS
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SELECT util.is_castable($1, $2)
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  LANGUAGE sql IMMUTABLE
  COST 100;
COMMENT ON FUNCTION is_castable(text, anyelement) IS '
wrapper that prevents views from getting dropped when the util schema is reinstalled
';