fatemehp commented on code in PR #17877:
URL: https://github.com/apache/arrow/pull/17877#discussion_r1088315597
##########
cpp/src/parquet/column_reader.cc:
##########
@@ -1829,21 +1831,34 @@ class TypedRecordReader : public
TypedColumnReaderImpl<DType>,
int64_t null_count = 0;
if (leaf_info_.HasNullableValues()) {
- ValidityBitmapInputOutput validity_io;
- validity_io.values_read_upper_bound = levels_position_ -
start_levels_position;
- validity_io.valid_bits = valid_bits_->mutable_data();
- validity_io.valid_bits_offset = values_written_;
-
- DefLevelsToBitmap(def_levels() + start_levels_position,
- levels_position_ - start_levels_position, leaf_info_,
- &validity_io);
- values_to_read = validity_io.values_read - validity_io.null_count;
- null_count = validity_io.null_count;
- DCHECK_GE(values_to_read, 0);
- ReadValuesSpaced(validity_io.values_read, null_count);
+ if (read_dense_for_nullable_) {
+ DCHECK_GE(values_to_read, 0);
+ ReadValuesDense(values_to_read);
+ // Total values, if reading dense, we don't have the nulls in the
values
+ // vector.
+ values_written_ += values_to_read;
+ // Any values with def_level < max_def_level is considered null.
+ null_count = levels_position_ - start_levels_position - values_to_read;
+ } else {
+ ValidityBitmapInputOutput validity_io;
+ validity_io.values_read_upper_bound = levels_position_ -
start_levels_position;
+ validity_io.valid_bits = valid_bits_->mutable_data();
+ validity_io.valid_bits_offset = values_written_;
+
+ DefLevelsToBitmap(def_levels() + start_levels_position,
+ levels_position_ - start_levels_position, leaf_info_,
+ &validity_io);
+ values_to_read = validity_io.values_read - validity_io.null_count;
+ null_count = validity_io.null_count;
+ ARROW_DCHECK_GE(values_to_read, 0);
Review Comment:
Done.
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