code: private boolean isValuesWithDefault(SqlNode source, int column) {
  		switch (source.getKind()) {
  			case VALUES:
  				for (SqlNode operand : ((SqlCall) source).getOperandList()) {
  					if (!isRowWithDefault(operand, column)) {
  						return false;
  					}
  				}
  				return true;
  		}
  		return false;
  	}
docs: Returns whether a query uses {@code DEFAULT} to populate a given
  column.