Method close

core/src/main/java/org/apache/calcite/tools/Planner.java:138–138

Releases all internal resources utilized while this Planner exists. Once called, this Planner object is no longer valid.

()

   * exists.  Once called, this Planner object is no longer valid.
   */
  @Override void close();

  RelTraitSet getEmptyTraitSet();
}