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b53c231ca6
This patch improves handling of NULLs in textual fields in ColumnStore. Previously empty strings were considered NULLs and it could be a problem if data scheme allows for empty strings. It was also one of major reasons of behavior difference between ColumnStore and other engines in MariaDB family. Also, this patch fixes some other bugs and incorrect behavior, for example, incorrect comparison for "column <= ''" which evaluates to constant True for all purposes before this patch.
353 lines
10 KiB
C++
353 lines
10 KiB
C++
/* Copyright (C) 2014 InfiniDB, Inc.
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Copyright (C) 2019 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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/***********************************************************************
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* $Id: constantcolumn.cpp 9474 2013-05-02 15:28:09Z rdempsey $
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*
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*
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***********************************************************************/
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#include <string>
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#include <iostream>
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#include <sstream>
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using namespace std;
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#include "bytestream.h"
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#include "constantcolumn.h"
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#include "objectreader.h"
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using namespace messageqcpp;
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#include "dataconvert.h"
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#include "calpontsystemcatalog.h"
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namespace execplan
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{
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/**
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* Constructors/Destructors
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*/
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ConstantColumn::ConstantColumn() : ReturnedColumn(), fType(NULLDATA)
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{
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}
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ConstantColumn::ConstantColumn(const string& sql, TYPE type)
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: ReturnedColumn(), fConstval(sql), fType(type), fData(sql)
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{
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fResult.strVal.assign(sql);
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fResult.intVal = atoll(sql.c_str());
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fResult.uintVal = strtoull(sql.c_str(), NULL, 0);
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fResult.floatVal = atof(sql.c_str());
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fResult.doubleVal = atof(sql.c_str());
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fResult.longDoubleVal = strtold(sql.c_str(), NULL);
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// decimal for constant should be constructed by the caller and call the decimal constructor
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fResult.decimalVal = datatypes::Decimal(fResult.intVal, 0, 18, (int128_t)fResult.intVal);
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// @bug 3381, default null item to integer type.
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if (fType == ConstantColumn::NULLDATA)
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{
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if (fResult.uintVal > (uint64_t)MAX_BIGINT)
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{
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fResultType.colDataType = CalpontSystemCatalog::UBIGINT;
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}
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else
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{
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fResultType.colDataType = CalpontSystemCatalog::BIGINT;
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}
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fResultType.colWidth = 8;
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}
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else
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{
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fResultType.colDataType = CalpontSystemCatalog::VARCHAR;
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fResultType.colWidth = sql.length();
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}
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}
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ConstantColumn::ConstantColumn(const string& sql, const double val)
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: ReturnedColumn(), fConstval(sql), fType(NUM), fData(sql)
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{
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fResult.strVal.assign(sql);
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fResult.doubleVal = val;
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fResult.intVal = (int64_t)val;
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fResult.uintVal = (uint64_t)val;
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fResult.floatVal = (float)val;
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fResult.longDoubleVal = val;
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// decimal for constant should be constructed by the caller and call the decimal constructor
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fResult.decimalVal = datatypes::Decimal(fResult.intVal, 0, 18, (int128_t)fResult.intVal);
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fResultType.colDataType = CalpontSystemCatalog::DOUBLE;
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fResultType.colWidth = 8;
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}
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ConstantColumn::ConstantColumn(const string& sql, const long double val)
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: ReturnedColumn(), fConstval(sql), fType(NUM), fData(sql)
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{
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fResult.strVal.assign(sql);
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fResult.doubleVal = (double)val;
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fResult.intVal = (int64_t)val;
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fResult.uintVal = (uint64_t)val;
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fResult.floatVal = (float)val;
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fResult.longDoubleVal = val;
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// decimal for constant should be constructed by the caller and call the decimal constructor
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fResult.decimalVal = datatypes::Decimal(fResult.intVal, 0, 18, (int128_t)fResult.intVal);
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fResultType.colDataType = CalpontSystemCatalog::DOUBLE;
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fResultType.colWidth = 8;
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}
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ConstantColumn::ConstantColumn(const string& sql, const int64_t val, TYPE type)
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: ReturnedColumn(), fConstval(sql), fType(type), fData(sql)
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{
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fResult.strVal.assign(sql);
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fResult.intVal = val;
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fResult.uintVal = (uint64_t)fResult.intVal;
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fResult.floatVal = (float)fResult.intVal;
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fResult.doubleVal = (double)fResult.intVal;
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fResult.longDoubleVal = (long double)fResult.intVal;
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fResult.decimalVal = datatypes::Decimal(fResult.intVal, 0, 0, (int128_t)fResult.intVal);
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fResultType.colDataType = CalpontSystemCatalog::BIGINT;
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fResultType.colWidth = 8;
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}
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ConstantColumn::ConstantColumn(const string& sql, const uint64_t val, TYPE type)
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: ReturnedColumn(), fConstval(sql), fType(type), fData(sql)
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{
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fResult.strVal.assign(sql);
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fResult.uintVal = val;
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fResult.intVal = (int64_t)fResult.uintVal;
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fResult.floatVal = (float)fResult.uintVal;
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fResult.doubleVal = (double)fResult.uintVal;
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fResult.longDoubleVal = (long double)fResult.uintVal;
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fResult.decimalVal = datatypes::Decimal(fResult.uintVal, 0, 0, (int128_t)fResult.uintVal);
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fResultType.colDataType = CalpontSystemCatalog::UBIGINT;
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fResultType.colWidth = 8;
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}
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ConstantColumn::ConstantColumn(const string& sql, const IDB_Decimal& val)
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: ReturnedColumn(), fConstval(sql), fType(NUM), fData(sql)
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{
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fResult.strVal.assign(sql);
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fResult.intVal = (int64_t)atoll(sql.c_str());
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fResult.uintVal = strtoull(sql.c_str(), NULL, 0);
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fResult.floatVal = atof(sql.c_str());
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fResult.doubleVal = atof(sql.c_str());
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fResult.longDoubleVal = strtold(sql.c_str(), NULL);
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fResult.decimalVal = val;
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fResultType.colDataType = CalpontSystemCatalog::DECIMAL;
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fResultType.setDecimalScalePrecision(val.precision, val.scale);
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}
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ConstantColumn::ConstantColumn(const ConstantColumn& rhs)
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: ReturnedColumn(rhs)
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, fConstval(rhs.constval())
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, fType(rhs.type())
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, fData(rhs.data())
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, fTimeZone(rhs.timeZone())
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{
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sequence(rhs.sequence());
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fAlias = rhs.alias();
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fResult = rhs.fResult;
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fResultType = rhs.fResultType;
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}
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ConstantColumn::ConstantColumn(const int64_t val, TYPE type) : ReturnedColumn(), fType(type)
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{
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ostringstream oss;
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oss << val;
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fConstval.assign(oss.str());
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fData = oss.str();
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fResult.strVal.assign(fData);
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fResult.intVal = val;
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fResult.uintVal = (uint64_t)fResult.intVal;
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fResult.floatVal = (float)fResult.intVal;
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fResult.doubleVal = (double)fResult.intVal;
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fResult.longDoubleVal = (long double)fResult.intVal;
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fResult.decimalVal = datatypes::Decimal(fResult.intVal, 0, 0, (int128_t)fResult.intVal);
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fResultType.colDataType = CalpontSystemCatalog::BIGINT;
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fResultType.colWidth = 8;
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}
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ConstantColumn::ConstantColumn(const uint64_t val, TYPE type, int8_t scale, uint8_t precision)
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: ReturnedColumn(), fType(type)
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{
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ostringstream oss;
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oss << val;
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fConstval.assign(oss.str());
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fData = oss.str();
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fResult.strVal.assign(fData);
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fResult.intVal = (int64_t)val;
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fResult.uintVal = val;
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fResult.floatVal = (float)fResult.uintVal;
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fResult.doubleVal = (double)fResult.uintVal;
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fResult.longDoubleVal = (long double)fResult.uintVal;
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fResult.decimalVal = datatypes::Decimal(fResult.uintVal, scale, precision, (int128_t)fResult.uintVal);
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fResultType.colDataType = CalpontSystemCatalog::UBIGINT;
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fResultType.colWidth = 8;
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}
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ConstantColumn::~ConstantColumn()
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{
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}
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const string ConstantColumn::toString() const
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{
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ostringstream oss;
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oss << "ConstantColumn: " << fConstval.safeString("<<NuLL>>") << " intVal=" << fResult.intVal
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<< " uintVal=" << fResult.uintVal;
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oss << '(';
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if (fType == LITERAL)
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oss << 'l';
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else if (fType == NUM)
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oss << 'n';
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else
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oss << "null";
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oss << ')';
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oss << " resultType=" << colDataTypeToString(fResultType.colDataType);
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if (fAlias.length() > 0)
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oss << "/Alias: " << fAlias;
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return oss.str();
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}
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std::string ConstantColumn::toCppCode(IncludeSet& includes) const
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{
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includes.insert("constantcolumn.h");
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std::stringstream ss;
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ss << "ConstantColumn(" << std::quoted(fData) << ", " << fConstval.safeString() << ")";
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return ss.str();
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}
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const string ConstantColumn::data() const
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{
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return fData;
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}
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ostream& operator<<(ostream& output, const ConstantColumn& rhs)
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{
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output << rhs.toString();
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return output;
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}
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void ConstantColumn::serialize(messageqcpp::ByteStream& b) const
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{
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b << (ObjectReader::id_t)ObjectReader::CONSTANTCOLUMN;
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ReturnedColumn::serialize(b);
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b << fConstval;
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b << (uint32_t)fType;
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// b << fAlias;
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b << fData;
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messageqcpp::ByteStream::octbyte timeZone = fTimeZone;
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b << timeZone;
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b << static_cast<ByteStream::doublebyte>(fReturnAll);
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b << (uint64_t)fResult.intVal;
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b << fResult.uintVal;
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b << fResult.doubleVal;
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b << fResult.longDoubleVal;
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b << fResult.floatVal;
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b << (uint8_t)fResult.boolVal;
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b << fResult.strVal;
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b << (uint64_t)fResult.decimalVal.value;
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b << fResult.decimalVal.s128Value;
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b << (uint8_t)fResult.decimalVal.scale;
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b << (uint8_t)fResult.decimalVal.precision;
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}
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void ConstantColumn::unserialize(messageqcpp::ByteStream& b)
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{
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ObjectReader::checkType(b, ObjectReader::CONSTANTCOLUMN);
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ReturnedColumn::unserialize(b);
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// uint64_t val;
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b >> fConstval;
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b >> (uint32_t&)fType;
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b >> fData;
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messageqcpp::ByteStream::octbyte timeZone;
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b >> timeZone;
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fTimeZone = timeZone;
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b >> reinterpret_cast<ByteStream::doublebyte&>(fReturnAll);
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b >> (uint64_t&)fResult.intVal;
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b >> fResult.uintVal;
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b >> fResult.doubleVal;
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b >> fResult.longDoubleVal;
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b >> fResult.floatVal;
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b >> (uint8_t&)fResult.boolVal;
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b >> fResult.strVal;
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b >> (uint64_t&)fResult.decimalVal.value;
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b >> fResult.decimalVal.s128Value;
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b >> (uint8_t&)fResult.decimalVal.scale;
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b >> (uint8_t&)fResult.decimalVal.precision;
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}
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bool ConstantColumn::operator==(const ConstantColumn& t) const
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{
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const ReturnedColumn *rc1, *rc2;
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rc1 = static_cast<const ReturnedColumn*>(this);
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rc2 = static_cast<const ReturnedColumn*>(&t);
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if (*rc1 != *rc2)
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return false;
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if (fConstval.isNull() != t.fConstval.isNull())
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return false;
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if (!fConstval.isNull() && fConstval.unsafeStringRef() != t.fConstval.unsafeStringRef())
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return false;
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if (fType != t.fType)
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return false;
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if (fData != t.fData)
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return false;
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if (fReturnAll != t.fReturnAll)
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return false;
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if (fTimeZone != t.fTimeZone)
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return false;
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return true;
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}
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bool ConstantColumn::operator==(const TreeNode* t) const
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{
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const ConstantColumn* o;
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o = dynamic_cast<const ConstantColumn*>(t);
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if (o == NULL)
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return false;
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return *this == *o;
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}
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bool ConstantColumn::operator!=(const ConstantColumn& t) const
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{
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return (!(*this == t));
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}
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bool ConstantColumn::operator!=(const TreeNode* t) const
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{
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return (!(*this == t));
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}
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} // namespace execplan
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