return this.ordering.equals(that.ordering);
    }
    return false;
  }

  @Override
  public int hashCode() {
    return ordering.hashCode() ^ 957692532; // meaningless
  }

  @Override
  public String toString() {
    return ordering + ".nullsFirst()";
  }

  @GwtIncompatible @J2ktIncompatible private static final long serialVersionUID = 0;

      return this.elementOrder.equals(that.elementOrder);
    }
    return false;
  }

  @Override
  public int hashCode() {
    return elementOrder.hashCode() ^ 2075626741; // meaningless
  }

  @Override
  public String toString() {
    return elementOrder + ".lexicographical()";
  }

  @GwtIncompatible @J2ktIncompatible private static final long serialVersionUID = 0;

      return this.elementOrder.equals(that.elementOrder);
    }
    return false;
  }

  @Override
  public int hashCode() {
    return elementOrder.hashCode() ^ 2075626741; // meaningless
  }

  @Override
  public String toString() {
    return elementOrder + ".lexicographical()";
  }

  @GwtIncompatible @J2ktIncompatible private static final long serialVersionUID = 0;

      return this.ordering.equals(that.ordering);
    }
    return false;
  }

  @Override
  public int hashCode() {
    return ordering.hashCode() ^ 957692532; // meaningless
  }

  @Override
  public String toString() {
    return ordering + ".nullsFirst()";
  }

  @GwtIncompatible @J2ktIncompatible private static final long serialVersionUID = 0;

      return this.ordering.equals(that.ordering);
    }
    return false;
  }

  @Override
  public int hashCode() {
    return ordering.hashCode() ^ -921210296; // meaningless
  }

  @Override
  public String toString() {
    return ordering + ".nullsLast()";
  }

  @GwtIncompatible @J2ktIncompatible private static final long serialVersionUID = 0;

      return this.ordering.equals(that.ordering);
    }
    return false;
  }

  @Override
  public int hashCode() {
    return ordering.hashCode() ^ -921210296; // meaningless
  }

  @Override
  public String toString() {
    return ordering + ".nullsLast()";
  }

  @GwtIncompatible @J2ktIncompatible private static final long serialVersionUID = 0;

// Row function - An expression that depends on a value in the
// row. They have an output for each input row.
//
// Some types of a queries are not valid. For example, an aggregation
// function combined with a row function is meaningless ("AVG(s.Age) +
// s.Salary"). Analysis determines if such a scenario exists so an
// error can be returned.

var (
	// Fatal error for query processing.

 *
 * <p>Use this class instead of direct calls to {@link System#nanoTime} for two reasons:
 *
 * <ul>
 *   <li>The raw {@code long} values returned by {@code nanoTime} are meaningless and unsafe to use
 *       in any other way than how {@code Stopwatch} uses them.
 *   <li>An alternative source of nanosecond ticks can be substituted, for example for testing or

 *
 * <p>Use this class instead of direct calls to {@link System#nanoTime} for two reasons:
 *
 * <ul>
 *   <li>The raw {@code long} values returned by {@code nanoTime} are meaningless and unsafe to use
 *       in any other way than how {@code Stopwatch} uses them.
 *   <li>An alternative source of nanosecond ticks can be substituted, for example for testing or

## Review PRs

* If a PR doesn't explain what it does or why, if it seems like it could be useful, ask for more information. Otherwise, feel free to close it.

* If a PR seems to be spam, meaningless, only to change statistics (to appear as "contributor") or similar, you can simply mark it as `invalid`, and it will be automatically closed.