import org.apache.calcite.sql.SqlOrderBy; //导入依赖的package包/类
public static boolean isOrdered(SqlNode query) {
	switch (query.getKind()) {
		case SELECT:
			return ((SqlSelect) query).getOrderList() != null
				&& ((SqlSelect) query).getOrderList().size() > 0;
		case WITH:
			return isOrdered(((SqlWith) query).body);
		case ORDER_BY:
			return ((SqlOrderBy) query).orderList.size() > 0;
		default:
			return false;
	}
}
 

import org.apache.calcite.sql.SqlOrderBy; //导入依赖的package包/类
public static boolean isOrdered(SqlNode query) {
  switch (query.getKind()) {
  case SELECT:
    return ((SqlSelect) query).getOrderList() != null
        && ((SqlSelect) query).getOrderList().size() > 0;
  case WITH:
    return isOrdered(((SqlWith) query).body);
  case ORDER_BY:
    return ((SqlOrderBy) query).orderList.size() > 0;
  default:
    return false;
  }
}
 

import org.apache.calcite.sql.SqlOrderBy; //导入依赖的package包/类
private SqlSelect getInnerSelect(SqlNode node) {
  for (;;) {
    if (node instanceof SqlSelect) {
      return (SqlSelect) node;
    } else if (node instanceof SqlOrderBy) {
      node = ((SqlOrderBy) node).query;
    } else if (node instanceof SqlWith) {
      node = ((SqlWith) node).body;
    } else {
      return null;
    }
  }
}
 

import org.apache.calcite.sql.SqlOrderBy; //导入依赖的package包/类
private List<String> getFieldOrigin(SqlNode sqlQuery, int i) {
  if (sqlQuery instanceof SqlSelect) {
    SqlSelect sqlSelect = (SqlSelect) sqlQuery;
    final SelectScope scope = getRawSelectScope(sqlSelect);
    final List<SqlNode> selectList = scope.getExpandedSelectList();
    final SqlNode selectItem = stripAs(selectList.get(i));
    if (selectItem instanceof SqlIdentifier) {
      final SqlQualified qualified =
          scope.fullyQualify((SqlIdentifier) selectItem);
      SqlValidatorNamespace namespace = qualified.namespace;
      final SqlValidatorTable table = namespace.getTable();
      if (table == null) {
        return null;
      }
      final List<String> origin =
          new ArrayList<>(table.getQualifiedName());
      for (String name : qualified.suffix()) {
        namespace = namespace.lookupChild(name);
        if (namespace == null) {
          return null;
        }
        origin.add(name);
      }
      return origin;
    }
    return null;
  } else if (sqlQuery instanceof SqlOrderBy) {
    return getFieldOrigin(((SqlOrderBy) sqlQuery).query, i);
  } else {
    return null;
  }
}
 

import org.apache.calcite.sql.SqlOrderBy; //导入依赖的package包/类
private VirtualDatasetState extractOrderBy(String sql, SqlNode node, final RelDataType relDataType) {
  SqlOrderBy orderBy = (SqlOrderBy)node;
  return extract(sql, orderBy.query, relDataType);
}