xiaokang commented on code in PR #23250:
URL: https://github.com/apache/doris/pull/23250#discussion_r1300222104
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be/src/olap/rowset/segment_v2/column_writer.cpp:
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@@ -1083,17 +1083,19 @@ Status MapColumnWriter::append_data(const uint8_t**
ptr, size_t num_rows) {
size_t element_cnt = size_t((unsigned long)(*data_ptr));
auto offset_data = *(data_ptr + 1);
const uint8_t* offsets_ptr = (const uint8_t*)offset_data;
- RETURN_IF_ERROR(_offsets_writer->append_data(&offsets_ptr, num_rows));
- if (element_cnt == 0) {
- return Status::OK();
- }
- for (size_t i = 0; i < 2; ++i) {
- auto data = *(data_ptr + 2 + i);
- auto nested_null_map = *(data_ptr + 2 + 2 + i);
- RETURN_IF_ERROR(_kv_writers[i]->append(reinterpret_cast<const
uint8_t*>(nested_null_map),
- reinterpret_cast<const
void*>(data), element_cnt));
+ if (element_cnt > 0) {
+ for (size_t i = 0; i < 2; ++i) {
+ auto data = *(data_ptr + 2 + i);
+ auto nested_null_map = *(data_ptr + 2 + 2 + i);
+ RETURN_IF_ERROR(
+ _kv_writers[i]->append(reinterpret_cast<const
uint8_t*>(nested_null_map),
+ reinterpret_cast<const
void*>(data), element_cnt));
+ }
}
+ // make sure the order : offset writer flush next_array_item_ordinal after
kv_writers append_data
+ // because we use _kv_writers[0]->get_next_rowid() to set
next_array_item_ordinal in offset page footer
+ RETURN_IF_ERROR(_offsets_writer->append_data(&offsets_ptr, num_rows));
Review Comment:
there is the same problem for array
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