if (isNatural) { final List<String> columnList = SqlValidatorUtil.deriveNaturalJoinColumnList( validator.getNamespace(left).getRowType(), validator.getNamespace(right).getRowType());
if (isNatural) { final List<String> columnList = SqlValidatorUtil.deriveNaturalJoinColumnList( validator.getNamespace(left).getRowType(), validator.getNamespace(right).getRowType());
if (isNatural) { final List<String> columnList = SqlValidatorUtil.deriveNaturalJoinColumnList( validator.getNamespace(left).getRowType(), validator.getNamespace(right).getRowType());
final RelDataType rightRowType = getNamespace(right).getRowType(); List<String> naturalColumnNames = SqlValidatorUtil.deriveNaturalJoinColumnList( leftRowType, rightRowType);
final RelDataType rightRowType = getNamespace(right).getRowType(); List<String> naturalColumnNames = SqlValidatorUtil.deriveNaturalJoinColumnList( leftRowType, rightRowType);