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new 7921320124 [fix]Make sure only call once set_dict_encoding_type for
each ColumnReader (#10389)
7921320124 is described below
commit 7921320124b05f87ac71c38b3a2d2fbc2e7b1361
Author: Jerry Hu <[email protected]>
AuthorDate: Sat Jun 25 04:31:19 2022 +0800
[fix]Make sure only call once set_dict_encoding_type for each ColumnReader
(#10389)
---
be/src/olap/rowset/segment_v2/column_reader.h | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/be/src/olap/rowset/segment_v2/column_reader.h
b/be/src/olap/rowset/segment_v2/column_reader.h
index 1312a0eb89..b82dbabb01 100644
--- a/be/src/olap/rowset/segment_v2/column_reader.h
+++ b/be/src/olap/rowset/segment_v2/column_reader.h
@@ -138,7 +138,9 @@ public:
uint64_t num_rows() { return _num_rows; }
- void set_dict_encoding_type(DictEncodingType type) { _dict_encoding_type =
type; }
+ void set_dict_encoding_type(DictEncodingType type) {
+ std::call_once(_set_dict_encoding_type_flag, [&] { _dict_encoding_type
= type; });
+ }
DictEncodingType get_dict_encoding_type() { return _dict_encoding_type; }
@@ -202,6 +204,8 @@ private:
std::unique_ptr<BloomFilterIndexReader> _bloom_filter_index;
std::vector<std::unique_ptr<ColumnReader>> _sub_readers;
+
+ std::once_flag _set_dict_encoding_type_flag;
};
// Base iterator to read one column data
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