public Map<PartialPath, Map<PartialPath, List<TimeseriesContext>>>
      getDeviceToTimeseriesSchemas() {
    return deviceToTimeseriesSchemas;
  }
Analysis used for planning a query. TODO: This class may need to store more info for a query.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/analyze/Analysis.java