Method isValid

core/src/main/java/org/apache/calcite/rel/RelNode.java:360–360

Returns whether this relational expression is valid. If assertions are enabled, this method is typically called with litmus = THROW , as follows: assert rel.isValid(Litmus.THROW) This signals that the method can throw an {@link

(Litmus litmus, @Nullable Context context)

   *                        litmus is THROW
   */
  boolean isValid(Litmus litmus, @Nullable Context context);

  /**
   * Creates a copy of this relational expression, perhaps changing traits and