Function PrintCollection

be/src/util/debug-util.cc:169–183

Print a collection (array or map), recursing through the children. Example: [(a 1) (b 2)]

// Print a collection (array or map), recursing through the children.
// Example: [(a 1) (b 2)]
static void PrintCollection(const Tuple* t, const SlotDescriptor& slot_d,
    stringstream* out) {
  DCHECK(t != nullptr);
  DCHECK(slot_d.type().IsCollectionType());
  const TupleDescriptor* child_tuple_d = slot_d.children_tuple_descriptor();
  const CollectionValue* coll_value =
      reinterpret_cast<const CollectionValue*>(t->GetSlot(slot_d.tuple_offset()));
  uint8_t* coll_buf = coll_value->ptr;
  *out << "[";
  for (int j = 0; j < coll_value->num_tuples; ++j) {
    PrintTuple(reinterpret_cast<Tuple*>(coll_buf), *child_tuple_d, out);
    coll_buf += child_tuple_d->byte_size();
  }
  *out << "]";
}

// Print a struct with field names, recursing to children. This is not intended to work
// with impala_udf::StructVal. Instead, it works with the representation of structs