@Nullable private Function rewriteAndValidateFields(Function function, Context context) { if (function.arguments().size() == 2) { Symbol left = function.arguments().get(0); Symbol right = function.arguments().get(1); if (left.symbolType() == SymbolType.REFERENCE && right.symbolType().isValueSymbol()) { Reference ref = (Reference) left; if (ref.info().ident().columnIdent().equals(DocSysColumns.ID)) { function.setArgument( 0, new Reference(DocSysColumns.forTable(ref.ident().tableIdent(), DocSysColumns.UID))); function.setArgument( 1, Literal.newLiteral( Uid.createUid( Constants.DEFAULT_MAPPING_TYPE, ValueSymbolVisitor.STRING.process(right)))); } else { String unsupportedMessage = context.unsupportedMessage(ref.info().ident().columnIdent().name()); if (unsupportedMessage != null) { throw new UnsupportedFeatureException(unsupportedMessage); } } } } return function; }