Method hash

core/src/main/java/org/apache/calcite/runtime/Utilities.java:49–51

(@Nullable Object v)

  }

  public static int hash(@Nullable Object v) {
    return v == null ? 0 : v.hashCode();
  }

  /** Computes the hash code of a {@code double} value. Equivalent to
   * {@link Double}{@code .hashCode(double)}, but that method was only