Method getIds

fe/src/main/java/org/apache/impala/analysis/Expr.java:1497–1503

Find all unique slot and/or tuple ids referenced by this expr tree. @param tupleIds unique tuple IDs from this expr tree are appended here. @param slotIds unique slot IDs from this expr tree are appended here.

(List<TupleId> tupleIds, List<SlotId> slotIds)

   * @param slotIds unique slot IDs from this expr tree are appended here.
   */
  public void getIds(List<TupleId> tupleIds, List<SlotId> slotIds) {
    Set<TupleId> tupleIdSet = new HashSet<>();
    Set<SlotId> slotIdSet = new HashSet<>();
    getIdsHelper(tupleIdSet, slotIdSet);
    if (tupleIds != null) tupleIds.addAll(tupleIdSet);
    if (slotIds != null) slotIds.addAll(slotIdSet);
  }

  protected void getIdsHelper(Set<TupleId> tupleIds, Set<SlotId> slotIds) {
    for (Expr child: children_) {