Method operand

core/src/main/java/org/apache/calcite/sql/SqlCall.java:103–108

Returns i-th operand (0-based). Note: the result might be null, so the proper signature would be , however, it would trigger to many changes to the current codebase. @param i operand index (0-based) @param type of the result @return i-th operand (0-based

(int i)

   * @return i-th operand (0-based), the result might be null
   */
  @SuppressWarnings("unchecked")
  public <S extends /*Nullable*/ SqlNode> S operand(int i) {
    // Note: in general, null elements exist in the list, however, the code
    // assumes operand(..) is non-nullable, so we add a cast here
    return (S) castNonNull(getOperandList().get(i));
  }

  public int operandCount() {
    return getOperandList().size();