@Override
  public List<? extends Node> getChildren() {
    final ImmutableList.Builder<Node> nodes = ImmutableList.builder();
    if (where != null) {
      nodes.add(where);
    }
    return nodes.build();
  }
filters/conditions involving non-id columns and concat by OR to id column filters
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/relational/sql/ast/AbstractTraverseDevice.java