lidavidm commented on code in PR #82:
URL: https://github.com/apache/arrow-nanoarrow/pull/82#discussion_r1041484656
##########
src/nanoarrow/array_inline.h:
##########
@@ -107,29 +107,69 @@ static inline ArrowErrorCode _ArrowArrayAppendBits(struct
ArrowArray* array,
return NANOARROW_OK;
}
-static inline ArrowErrorCode ArrowArrayAppendNull(struct ArrowArray* array,
int64_t n) {
+static inline ArrowErrorCode _ArrowArrayAppendEmptyInternal(struct ArrowArray*
array,
+ int64_t n, uint8_t
is_valid) {
struct ArrowArrayPrivateData* private_data =
(struct ArrowArrayPrivateData*)array->private_data;
if (n == 0) {
return NANOARROW_OK;
}
- if (private_data->storage_type == NANOARROW_TYPE_NA) {
- array->null_count += n;
- array->length += n;
- return NANOARROW_OK;
+ // Some type-specific handling
+ switch (private_data->storage_type) {
+ case NANOARROW_TYPE_NA:
+ array->null_count += n * !is_valid;
+ array->length += n;
+ return NANOARROW_OK;
+ case NANOARROW_TYPE_DENSE_UNION:
+ // Add one null to the first child and append n references to that child
+ // (Currently assumes type_id == child_index)
Review Comment:
Maybe the appender's signature should require the caller to maintain this
mapping (and if not given, assume type ID == child index for simplicity?)
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