Method getInput

core/src/main/java/org/apache/calcite/rel/RelNode.java:111–111

Returns the i th input relational expression. @param i Ordinal of input @return i th input

(int i)

   * @return <code>i</code><sup>th</sup> input
   */
  RelNode getInput(int i);

  /**
   * Returns the type of the rows returned by this relational expression.