Method isLt

core/src/main/java/org/apache/calcite/plan/RelOptCost.java:84–84

Compares this to another cost. @param cost another cost @return true iff this is strictly less than other cost

(RelOptCost cost)

   * @return true iff this is strictly less than other cost
   */
  boolean isLt(RelOptCost cost);

  /**
   * Adds another cost to this.