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Posted to commits@doris.apache.org by yi...@apache.org on 2022/05/07 00:43:20 UTC
[incubator-doris] branch master updated: [performance][query]improve the performance of DISTINCT aggregation by using flat hash set replace unordered set (#9401)
This is an automated email from the ASF dual-hosted git repository.
yiguolei pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/incubator-doris.git
The following commit(s) were added to refs/heads/master by this push:
new 811f019e47 [performance][query]improve the performance of DISTINCT aggregation by using flat hash set replace unordered set (#9401)
811f019e47 is described below
commit 811f019e471f7fc08ce8fa7b341f0040fbe9a570
Author: shee <13...@users.noreply.github.com>
AuthorDate: Fri May 6 17:43:14 2022 -0700
[performance][query]improve the performance of DISTINCT aggregation by using flat hash set replace unordered set (#9401)
Co-authored-by: shizhiqiang03 <sh...@meituan.com>
---
be/src/exprs/aggregate_functions.cpp | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/be/src/exprs/aggregate_functions.cpp b/be/src/exprs/aggregate_functions.cpp
index 590e07838a..257aca4a38 100644
--- a/be/src/exprs/aggregate_functions.cpp
+++ b/be/src/exprs/aggregate_functions.cpp
@@ -1346,7 +1346,8 @@ private:
}
};
- std::unordered_set<T, NumericHashHelper> _set;
+ phmap::flat_hash_set<T, NumericHashHelper> _set;
+
// Because Anyval does not provide the hash function, in order
// to adopt the type different from the template, the pointer is used
// HybridSetBase* _set;
@@ -1503,7 +1504,8 @@ public:
private:
const int DECIMAL_BYTE_SIZE = 16;
- std::unordered_set<DecimalV2Value> _set;
+ phmap::flat_hash_set<DecimalV2Value> _set;
+
FunctionContext::Type _type;
};
@@ -1588,7 +1590,8 @@ private:
const int DATETIME_PACKED_TIME_BYTE_SIZE = 8;
const int DATETIME_TYPE_BYTE_SIZE = 4;
- std::unordered_set<DateTimeVal, DateTimeHashHelper> _set;
+ phmap::flat_hash_set<DateTimeVal, DateTimeHashHelper> _set;
+
FunctionContext::Type _type;
};
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