[fix](compaction) fix the issue of writing segment with 0 rows during…

… compaction (#38251)

#37960 introduced this issue

be/src/olap/rowset/vertical_beta_rowset_writer.cpp

@@ -89,7 +89,7 @@ Status VerticalBetaRowsetWriter<T>::add_columns(const vectorized::Block* block,
             VLOG_NOTICE << "num_rows_written: " << num_rows_written
                         << ", _cur_writer_idx: " << _cur_writer_idx;
             uint32_t num_rows_key_group = _segment_writers[_cur_writer_idx]->row_count();
-            CHECK_LE(num_rows_written, num_rows_key_group);
+            CHECK_LT(num_rows_written, num_rows_key_group);
             // init if it's first value column write in current segment
             if (num_rows_written == 0) {
                 VLOG_NOTICE << "init first value column segment writer";
@@ -104,7 +104,8 @@ Status VerticalBetaRowsetWriter<T>::add_columns(const vectorized::Block* block,
             left -= to_write;
             CHECK_GE(left, 0);
 
-            if (left > 0) {
+            if (num_rows_key_group == num_rows_written + to_write &&
+                _cur_writer_idx < _segment_writers.size() - 1) {
                 ++_cur_writer_idx;
             }
         }