wumeibanfa commented on code in PR #55719:
URL: https://github.com/apache/doris/pull/55719#discussion_r2342934061
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be/src/vec/exec/format/parquet/vparquet_column_reader.cpp:
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@@ -406,6 +408,8 @@ Status ScalarColumnReader::_read_nested_column(ColumnPtr&
doris_column, DataType
NullMap* map_data_column = nullptr;
if (doris_column->is_nullable()) {
SCOPED_RAW_TIMER(&_decode_null_map_time);
+ // doris_column either originates from a mutable block in
vparquet_group_reader
Review Comment:
get_physical_column
可能会返回doris_column，这个是read_column_data的参数，然后这个参数是由vparquet_group_reader中传入的一个block中的columnPtr
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