wumeibanfa commented on code in PR #55719:
URL: https://github.com/apache/doris/pull/55719#discussion_r2343041420
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be/src/vec/exec/format/parquet/vparquet_group_reader.cpp:
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@@ -122,6 +122,7 @@ Status RowGroupReader::init(
for (const auto& read_table_col : _read_table_columns) {
auto read_file_col =
_table_info_node_ptr->children_file_column_name(read_table_col);
+ // The schema is obtained from vparquet_reader, whose value is derived
from parse_thrift_footer, which is a mutable object.
auto* field =
const_cast<FieldSchema*>(schema.get_column(read_file_col));
Review Comment:
然后上游也改不了，上游用了一个底层的数据结构cache，然后value存的是const T
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