HappenLee commented on code in PR #19917:
URL: https://github.com/apache/doris/pull/19917#discussion_r1233780692


##########
be/src/vec/sink/vtablet_sink.cpp:
##########
@@ -1171,6 +1309,46 @@ void VOlapTableSink::_open_partition(const 
VOlapTablePartition* partition) {
     }
 }
 
+Status VOlapTableSink::_fill_auto_inc_cols(vectorized::Block* block, size_t 
rows, bool eos) {
+    size_t idx = _auto_inc_col_idx.value();
+    SlotDescriptor* slot = _output_tuple_desc->slots()[idx];
+    DCHECK(slot->type().type == PrimitiveType::TYPE_BIGINT);
+    DCHECK(!slot->is_nullable());
+
+    vectorized::ColumnPtr src_column_ptr = block->get_by_position(idx).column;
+    auto src_nested_column_ptr =
+            assert_cast<const 
vectorized::ColumnNullable&>(*src_column_ptr).get_nested_column_ptr();
+
+    auto dst_column = vectorized::ColumnInt64::create();
+    vectorized::ColumnInt64::Container& dst_values = dst_column->get_data();
+    dst_values.reserve(rows);
+

Review Comment:
   // the code should be DEBUG
   ```
   size_t count = 0;
       for (size_t i = 0; i < rows; i++) {
           if (src_column_ptr->is_null_at(i)) {
               ++count;
           }
       }
   ```



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