forked from pingcap/tiflash
-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
…cap#5299) ref pingcap#5294
- Loading branch information
1 parent
5370282
commit 87a967a
Showing
5 changed files
with
287 additions
and
30 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,210 @@ | ||
| // Copyright 2022 PingCAP, Ltd. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| #pragma once | ||
|
|
||
| #include <Columns/ColumnString.h> | ||
| #include <Core/AccurateComparison.h> | ||
| #include <Functions/StringUtil.h> | ||
| #include <common/StringRef.h> | ||
| #include <common/defines.h> | ||
|
|
||
| #include <cstddef> | ||
| #include <string_view> | ||
|
|
||
|
|
||
| namespace DB | ||
| { | ||
|
|
||
| template <typename T> | ||
| ALWAYS_INLINE inline int signum(T val) | ||
| { | ||
| return (0 < val) - (val < 0); | ||
| } | ||
|
|
||
| // Check equality is much faster than other comparison. | ||
| // - check size first | ||
| // - return 0 if equal else 1 | ||
| __attribute__((flatten, always_inline, pure)) inline uint8_t RawStrEqualCompare(const std::string_view & lhs, const std::string_view & rhs) | ||
| { | ||
| return StringRef(lhs) == StringRef(rhs) ? 0 : 1; | ||
| } | ||
|
|
||
| // Compare str view by memcmp | ||
| __attribute__((flatten, always_inline, pure)) inline int RawStrCompare(const std::string_view & v1, const std::string_view & v2) | ||
| { | ||
| return signum(v1.compare(v2)); | ||
| } | ||
|
|
||
| constexpr char SPACE = ' '; | ||
|
|
||
| // Remove tail space | ||
| __attribute__((flatten, always_inline, pure)) inline std::string_view RightTrim(const std::string_view & v) | ||
| { | ||
| if (likely(v.empty() || v.back() != SPACE)) | ||
| return v; | ||
| size_t end = v.find_last_not_of(SPACE); | ||
| return end == std::string_view::npos ? std::string_view{} : std::string_view(v.data(), end + 1); | ||
| } | ||
|
|
||
| __attribute__((flatten, always_inline, pure)) inline int RtrimStrCompare(const std::string_view & va, const std::string_view & vb) | ||
| { | ||
| return RawStrCompare(RightTrim(va), RightTrim(vb)); | ||
| } | ||
|
|
||
| // If true, only need to check equal or not. | ||
| template <typename T> | ||
| struct IsEqualRelated | ||
| { | ||
| static constexpr const bool value = false; | ||
| }; | ||
|
|
||
| // For `EqualsOp` and `NotEqualsOp`, value is true. | ||
| template <typename... A> | ||
| struct IsEqualRelated<DB::EqualsOp<A...>> | ||
| { | ||
| static constexpr const bool value = true; | ||
| }; | ||
| template <typename... A> | ||
| struct IsEqualRelated<DB::NotEqualsOp<A...>> | ||
| { | ||
| static constexpr const bool value = true; | ||
| }; | ||
|
|
||
| // Loop columns and invoke callback for each pair. | ||
| template <typename F> | ||
| __attribute__((flatten, always_inline)) inline void LoopTwoColumns( | ||
| const ColumnString::Chars_t & a_data, | ||
| const ColumnString::Offsets & a_offsets, | ||
| const ColumnString::Chars_t & b_data, | ||
| const ColumnString::Offsets & b_offsets, | ||
| size_t size, | ||
| F && func) | ||
| { | ||
| for (size_t i = 0; i < size; ++i) | ||
| { | ||
| size_t a_size = StringUtil::sizeAt(a_offsets, i) - 1; | ||
| size_t b_size = StringUtil::sizeAt(b_offsets, i) - 1; | ||
| const auto * a_ptr = reinterpret_cast<const char *>(&a_data[StringUtil::offsetAt(a_offsets, i)]); | ||
| const auto * b_ptr = reinterpret_cast<const char *>(&b_data[StringUtil::offsetAt(b_offsets, i)]); | ||
|
|
||
| func({a_ptr, a_size}, {b_ptr, b_size}, i); | ||
| } | ||
| } | ||
|
|
||
| // Loop one column and invoke callback for each pair. | ||
| template <typename F> | ||
| __attribute__((flatten, always_inline)) inline void LoopOneColumn( | ||
| const ColumnString::Chars_t & a_data, | ||
| const ColumnString::Offsets & a_offsets, | ||
| size_t size, | ||
| F && func) | ||
| { | ||
| for (size_t i = 0; i < size; ++i) | ||
| { | ||
| size_t a_size = StringUtil::sizeAt(a_offsets, i) - 1; | ||
| const auto * a_ptr = reinterpret_cast<const char *>(&a_data[StringUtil::offsetAt(a_offsets, i)]); | ||
|
|
||
| func({a_ptr, a_size}, i); | ||
| } | ||
| } | ||
|
|
||
| // Handle str-column compare str-column. | ||
| // - Optimize UTF8_BIN and UTF8MB4_BIN | ||
| // - Check if columns do NOT contain tail space | ||
| // - If Op is `EqualsOp` or `NotEqualsOp`, optimize comparison by faster way | ||
| template <typename Op, typename Result> | ||
| ALWAYS_INLINE inline bool StringVectorStringVector( | ||
| const ColumnString::Chars_t & a_data, | ||
| const ColumnString::Offsets & a_offsets, | ||
| const ColumnString::Chars_t & b_data, | ||
| const ColumnString::Offsets & b_offsets, | ||
| const TiDB::TiDBCollatorPtr & collator, | ||
| Result & c) | ||
| { | ||
| bool use_optimized_path = false; | ||
|
|
||
| switch (collator->getCollatorId()) | ||
| { | ||
| case TiDB::ITiDBCollator::UTF8MB4_BIN: | ||
| case TiDB::ITiDBCollator::UTF8_BIN: | ||
| { | ||
| size_t size = a_offsets.size(); | ||
|
|
||
| LoopTwoColumns(a_data, a_offsets, b_data, b_offsets, size, [&c](const std::string_view & va, const std::string_view & vb, size_t i) { | ||
| if constexpr (IsEqualRelated<Op>::value) | ||
| { | ||
| c[i] = Op::apply(RawStrEqualCompare(RightTrim(va), RightTrim(vb)), 0); | ||
| } | ||
| else | ||
| { | ||
| c[i] = Op::apply(RtrimStrCompare(va, vb), 0); | ||
| } | ||
| }); | ||
|
|
||
| use_optimized_path = true; | ||
|
|
||
| break; | ||
| } | ||
| default: | ||
| break; | ||
| } | ||
| return use_optimized_path; | ||
| } | ||
|
|
||
| // Handle str-column compare const-str. | ||
| // - Optimize UTF8_BIN and UTF8MB4_BIN | ||
| // - Right trim const-str first | ||
| // - Check if column does NOT contain tail space | ||
| // - If Op is `EqualsOp` or `NotEqualsOp`, optimize comparison by faster way | ||
| template <typename Op, typename Result> | ||
| ALWAYS_INLINE inline bool StringVectorConstant( | ||
| const ColumnString::Chars_t & a_data, | ||
| const ColumnString::Offsets & a_offsets, | ||
| const std::string_view & b, | ||
| const TiDB::TiDBCollatorPtr & collator, | ||
| Result & c) | ||
| { | ||
| bool use_optimized_path = false; | ||
|
|
||
| switch (collator->getCollatorId()) | ||
| { | ||
| case TiDB::ITiDBCollator::UTF8MB4_BIN: | ||
| case TiDB::ITiDBCollator::UTF8_BIN: | ||
| { | ||
| size_t size = a_offsets.size(); | ||
|
|
||
| std::string_view tar_str_view = RightTrim(b); // right trim const-str first | ||
|
|
||
| LoopOneColumn(a_data, a_offsets, size, [&c, &tar_str_view](const std::string_view & view, size_t i) { | ||
| if constexpr (IsEqualRelated<Op>::value) | ||
| { | ||
| c[i] = Op::apply(RawStrEqualCompare(RightTrim(view), tar_str_view), 0); | ||
| } | ||
| else | ||
| { | ||
| c[i] = Op::apply(RawStrCompare(RightTrim(view), tar_str_view), 0); | ||
| } | ||
| }); | ||
|
|
||
| use_optimized_path = true; | ||
| break; | ||
| } | ||
| default: | ||
| break; | ||
| } | ||
| return use_optimized_path; | ||
| } | ||
|
|
||
| } // namespace DB |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.