private SchemaNode generateSchemaTreeWithInternalRepeatedName() {
    SchemaNode root = new SchemaInternalNode("root");

    SchemaNode parent = root;
    SchemaNode a;
    MeasurementSchema schema = new MeasurementSchema("s", TSDataType.INT32);
    SchemaNode s;
    for (int i = 0; i < 5; i++) {
      a = new SchemaEntityNode("a");
      s = new SchemaMeasurementNode("s", schema);
      a.addChild("s", s);
      parent.addChild("a", a);
      parent = a;
    }

    parent = root;
    SchemaNode c;
    for (int i = 0; i < 3; i++) {
      c = new SchemaInternalNode("c");
      parent.addChild("c", c);
      parent = c;
    }

    SchemaNode d = new SchemaInternalNode("d");
    parent.addChild("d", d);
    parent = d;

    for (int i = 0; i < 2; i++) {
      c = new SchemaEntityNode("c");
      c.addChild("s1", new SchemaMeasurementNode("s1", schema));
      parent.addChild("c", c);
      parent = c;
    }

    return root;
  }
Generate the following tree: root.a.s, root.a.a.s, root.a.a.a.s, root.a.a.a.a.s,
root.a.a.a.a.a.s, root.c.c.c.d.c.s1, root.c.c.c.d.c.c.s1

@return the root node of the generated schemTree
iotdb-core/datanode/src/test/java/org/apache/iotdb/db/queryengine/common/schematree/ClusterSchemaTreeTest.java