mirror of
https://github.com/mariadb-corporation/mariadb-columnstore-engine.git
synced 2025-04-20 09:07:44 +03:00
6e995e2e80
BLOB fields did not work as grouping keys at all, they were assigned value NULL for any value, be it NULL or not. The fix is in the rowaggregation.cpp in the initMapping(), a switch/case branch was added to handle BLOB field copying there. Also, TEXT columns did not distinguish between NULL and empty string in the grouping algorithm, now they do. The fix is in the equals() function, now we specifically check for isNull() equality between values.
122 lines
2.7 KiB
C++
122 lines
2.7 KiB
C++
/* Copyright (C) 2020 MariaDB Corporation.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; version 2 of
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the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#pragma once
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#include <string>
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#include <string.h>
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#include <execinfo.h>
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#include "exceptclasses.h"
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namespace utils
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{
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class ConstString
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{
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protected:
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const char* mStr; // it can be NULL now.
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size_t mLength;
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public:
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ConstString(const char* str, size_t length) : mStr(str), mLength(length)
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{
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if (!mStr)
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mLength = 0;
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}
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explicit ConstString(const std::string& str) : mStr(str.data()), mLength(str.length())
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{
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}
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template <typename T>
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ConstString(const T* value, T nullValue, int colWidth)
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{
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if (*value == nullValue)
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{
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mStr = nullptr;
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mLength = 0;
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}
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else
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{
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mStr = reinterpret_cast<const char*>(value);
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mLength = colWidth;
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}
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}
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const char* str() const
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{
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return mStr;
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}
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const char* end() const
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{
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// end() should be computed for non-nullptr mStrs, otherwise it is undefined behavior.
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if (!mStr)
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{
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return nullptr;
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}
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return mStr + mLength;
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}
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size_t length() const
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{
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return mLength;
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}
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std::string toString() const
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{
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idbassert(mStr);
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return std::string(mStr, mLength);
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}
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bool eq(char ch) const
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{
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return mLength == 1 && mStr[0] == ch;
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}
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bool eq(const ConstString& rhs) const
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{
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if (!mStr || !rhs.mStr)
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{
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return mStr == rhs.mStr;
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}
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return mLength == rhs.mLength && !memcmp(mStr, rhs.mStr, mLength);
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}
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ConstString& rtrimZero()
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{
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for (; mLength && mStr[mLength - 1] == '\0'; mLength--)
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{
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}
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return *this;
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}
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ConstString& rtrimSpaces()
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{
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for (; mLength && mStr[mLength - 1] == ' '; --mLength)
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{
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}
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return *this;
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}
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void bin2hex(char* o)
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{
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static const char hexdig[] = {'0', '1', '2', '3', '4', '5', '6', '7',
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'8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
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const char* e = end();
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for (const char* s = mStr; s < e; s++)
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{
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*o++ = hexdig[*s >> 4];
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*o++ = hexdig[*s & 0xf];
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}
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}
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bool isNull() const
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{
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return mStr == nullptr;
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}
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};
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} // namespace utils
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