Method getInputs

core/src/main/java/org/apache/calcite/rel/RelNode.java:134–134

Returns an array of this relational expression's inputs. If there are no inputs, returns an empty list, not null. @return Array of this relational expression's inputs

()

   * @return Array of this relational expression's inputs
   */
  @Override List<RelNode> getInputs();

  /**
   * Returns an estimate of the number of rows this relational expression will