mirror of
https://github.com/mariadb-corporation/mariadb-columnstore-engine.git
synced 2025-04-26 11:48:52 +03:00
381 lines
12 KiB
C++
381 lines
12 KiB
C++
/* Copyright (C) 2014 InfiniDB, Inc.
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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: func_regexp.cpp 3495 2013-01-21 14:09:51Z rdempsey $
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*
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*
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****************************************************************************/
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#include <cstdlib>
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#include <string>
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using namespace std;
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#include "utils/pcre2/jpcre2.hpp"
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#include "functor_bool.h"
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#include "functor_str.h"
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#include "functioncolumn.h"
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#include "predicateoperator.h"
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#include "constantcolumn.h"
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using namespace execplan;
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#include "rowgroup.h"
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#include "errorcodes.h"
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#include "idberrorinfo.h"
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#include "errorids.h"
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using namespace logging;
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namespace
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{
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struct RegExpParams
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{
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std::string expression;
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std::string pattern;
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};
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inline RegExpParams getEpressionAndPattern(rowgroup::Row& row, funcexp::FunctionParm& pm, bool& isNull,
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CalpontSystemCatalog::ColType& ct, long timeZone)
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{
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string expr;
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string pattern;
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switch (pm[0]->data()->resultType().colDataType)
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{
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case execplan::CalpontSystemCatalog::BIGINT:
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case execplan::CalpontSystemCatalog::INT:
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case execplan::CalpontSystemCatalog::MEDINT:
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case execplan::CalpontSystemCatalog::TINYINT:
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case execplan::CalpontSystemCatalog::SMALLINT:
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case execplan::CalpontSystemCatalog::UBIGINT:
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case execplan::CalpontSystemCatalog::UINT:
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case execplan::CalpontSystemCatalog::UMEDINT:
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case execplan::CalpontSystemCatalog::UTINYINT:
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case execplan::CalpontSystemCatalog::USMALLINT:
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case execplan::CalpontSystemCatalog::VARCHAR: // including CHAR'
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case execplan::CalpontSystemCatalog::CHAR:
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case execplan::CalpontSystemCatalog::TEXT:
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case execplan::CalpontSystemCatalog::DOUBLE:
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case execplan::CalpontSystemCatalog::UDOUBLE:
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case execplan::CalpontSystemCatalog::FLOAT:
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case execplan::CalpontSystemCatalog::UFLOAT:
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{
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expr = pm[0]->data()->getStrVal(row, isNull).safeString("");
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break;
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}
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case execplan::CalpontSystemCatalog::DATE:
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{
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expr = dataconvert::DataConvert::dateToString(pm[0]->data()->getDateIntVal(row, isNull));
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break;
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}
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case execplan::CalpontSystemCatalog::DATETIME:
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{
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expr = dataconvert::DataConvert::datetimeToString(pm[0]->data()->getDatetimeIntVal(row, isNull));
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// strip off micro seconds
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expr = expr.substr(0, 19);
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break;
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}
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case execplan::CalpontSystemCatalog::TIMESTAMP:
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{
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expr = dataconvert::DataConvert::timestampToString(pm[0]->data()->getTimestampIntVal(row, isNull),
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timeZone);
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// strip off micro seconds
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expr = expr.substr(0, 19);
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break;
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}
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case execplan::CalpontSystemCatalog::TIME:
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{
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expr = dataconvert::DataConvert::timeToString(pm[0]->data()->getTimeIntVal(row, isNull));
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// strip off micro seconds
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expr = expr.substr(0, 19);
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break;
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}
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case execplan::CalpontSystemCatalog::DECIMAL:
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case execplan::CalpontSystemCatalog::UDECIMAL:
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{
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IDB_Decimal d = pm[0]->data()->getDecimalVal(row, isNull);
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if (pm[0]->data()->resultType().colWidth == datatypes::MAXDECIMALWIDTH)
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{
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expr = d.toString(true);
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}
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else
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{
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expr = d.toString();
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}
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break;
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}
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default:
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{
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std::ostringstream oss;
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oss << "regexp: datatype of " << execplan::colDataTypeToString(ct.colDataType);
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throw logging::IDBExcept(oss.str(), ERR_DATATYPE_NOT_SUPPORT);
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}
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}
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switch (pm[1]->data()->resultType().colDataType)
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{
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case execplan::CalpontSystemCatalog::BIGINT:
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case execplan::CalpontSystemCatalog::INT:
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case execplan::CalpontSystemCatalog::MEDINT:
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case execplan::CalpontSystemCatalog::TINYINT:
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case execplan::CalpontSystemCatalog::SMALLINT:
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case execplan::CalpontSystemCatalog::UBIGINT:
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case execplan::CalpontSystemCatalog::UINT:
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case execplan::CalpontSystemCatalog::UMEDINT:
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case execplan::CalpontSystemCatalog::UTINYINT:
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case execplan::CalpontSystemCatalog::USMALLINT:
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case execplan::CalpontSystemCatalog::VARCHAR: // including CHAR'
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case execplan::CalpontSystemCatalog::DOUBLE:
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case execplan::CalpontSystemCatalog::UDOUBLE:
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case execplan::CalpontSystemCatalog::FLOAT:
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case execplan::CalpontSystemCatalog::UFLOAT:
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case execplan::CalpontSystemCatalog::CHAR:
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case execplan::CalpontSystemCatalog::TEXT:
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{
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pattern = pm[1]->data()->getStrVal(row, isNull).safeString("");
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break;
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}
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case execplan::CalpontSystemCatalog::DATE:
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{
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pattern = dataconvert::DataConvert::dateToString(pm[1]->data()->getDateIntVal(row, isNull));
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break;
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}
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case execplan::CalpontSystemCatalog::DATETIME:
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{
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pattern = dataconvert::DataConvert::datetimeToString(pm[1]->data()->getDatetimeIntVal(row, isNull));
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// strip off micro seconds
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pattern = pattern.substr(0, 19);
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break;
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}
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case execplan::CalpontSystemCatalog::TIMESTAMP:
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{
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pattern = dataconvert::DataConvert::timestampToString(pm[1]->data()->getTimestampIntVal(row, isNull),
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timeZone);
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// strip off micro seconds
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pattern = pattern.substr(0, 19);
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break;
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}
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case execplan::CalpontSystemCatalog::TIME:
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{
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pattern = dataconvert::DataConvert::timeToString(pm[1]->data()->getTimeIntVal(row, isNull));
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// strip off micro seconds
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pattern = pattern.substr(0, 19);
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break;
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}
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case execplan::CalpontSystemCatalog::DECIMAL:
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case execplan::CalpontSystemCatalog::UDECIMAL:
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{
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IDB_Decimal d = pm[1]->data()->getDecimalVal(row, isNull);
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if (pm[1]->data()->resultType().colWidth == datatypes::MAXDECIMALWIDTH)
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{
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pattern = d.toString(true);
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}
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else
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{
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pattern = d.toString();
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}
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break;
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}
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default:
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{
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std::ostringstream oss;
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oss << "regexp: datatype of " << execplan::colDataTypeToString(ct.colDataType);
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throw logging::IDBExcept(oss.str(), ERR_DATATYPE_NOT_SUPPORT);
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}
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}
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return RegExpParams{expr, pattern};
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}
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} // namespace
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namespace funcexp
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{
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CalpontSystemCatalog::ColType Func_regexp_replace::operationType(FunctionParm& fp,
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CalpontSystemCatalog::ColType& resultType)
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{
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// operation type is not used by this functor
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return fp[0]->data()->resultType();
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}
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CalpontSystemCatalog::ColType Func_regexp_substr::operationType(FunctionParm& fp,
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CalpontSystemCatalog::ColType& resultType)
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{
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// operation type is not used by this functor
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return fp[0]->data()->resultType();
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}
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CalpontSystemCatalog::ColType Func_regexp_instr::operationType(FunctionParm& fp,
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CalpontSystemCatalog::ColType& resultType)
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{
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// operation type is not used by this functor
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return fp[0]->data()->resultType();
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}
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CalpontSystemCatalog::ColType Func_regexp::operationType(FunctionParm& fp,
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CalpontSystemCatalog::ColType& resultType)
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{
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return resultType;
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}
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using jp = jpcre2::select<char>;
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struct PCREOptions
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{
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jpcre2::Uint flags = 0;
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CHARSET_INFO* library_charset = &my_charset_utf8mb3_general_ci;
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bool conversion_is_needed = false;
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};
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inline bool areSameCharsets(CHARSET_INFO* cs1, CHARSET_INFO* cs2)
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{
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return (cs1->cs_name.str == cs2->cs_name.str);
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}
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PCREOptions pcreOptions(execplan::CalpontSystemCatalog::ColType& ct)
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{
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CHARSET_INFO* cs = ct.getCharset();
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PCREOptions options;
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// TODO use system variable instead if hardcode default_regex_flags_pcre(_current_thd());
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jpcre2::Uint defaultFlags =
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PCRE2_DOTALL | PCRE2_DUPNAMES | PCRE2_EXTENDED | PCRE2_EXTENDED_MORE | PCRE2_MULTILINE | PCRE2_UNGREEDY;
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options.flags = (cs != &my_charset_bin ? (PCRE2_UTF | PCRE2_UCP) : 0) |
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((cs->state & (MY_CS_BINSORT | MY_CS_CSSORT)) ? 0 : PCRE2_CASELESS) | defaultFlags;
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// Convert text data to utf-8.
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options.library_charset = cs == &my_charset_bin ? &my_charset_bin : &my_charset_utf8mb3_general_ci;
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options.conversion_is_needed = (cs != &my_charset_bin) && !areSameCharsets(cs, options.library_charset);
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return options;
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}
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/*
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returns the string subject with all occurrences of the regular expression pattern replaced by
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the string replace. If no occurrences are found, then subject is returned as is.
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https://mariadb.com/kb/en/regexp_replace/
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*/
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std::string Func_regexp_replace::getStrVal(rowgroup::Row& row, FunctionParm& fp, bool& isNull,
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execplan::CalpontSystemCatalog::ColType& ct)
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{
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RegExpParams param = getEpressionAndPattern(row, fp, isNull, ct, ct.getTimeZone());
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if (isNull)
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return std::string{};
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const auto& replace_with = fp[2]->data()->getStrVal(row, isNull);
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if (replace_with.isNull())
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return param.expression;
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const PCREOptions& options = pcreOptions(ct);
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jp::Regex re(param.pattern, options.flags);
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return re.replace(param.expression, replace_with.unsafeStringRef(), "g");
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}
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/*
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Returns the part of the string subject that matches the regular expression pattern, or an empty string if
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pattern was not found. https://mariadb.com/kb/en/regexp_substr/
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*/
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std::string Func_regexp_substr::getStrVal(rowgroup::Row& row, FunctionParm& fp, bool& isNull,
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execplan::CalpontSystemCatalog::ColType& ct)
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{
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RegExpParams param = getEpressionAndPattern(row, fp, isNull, ct, ct.getTimeZone());
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if (isNull)
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return std::string{};
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const PCREOptions& options = pcreOptions(ct);
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jp::Regex re(param.pattern, options.flags);
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jp::RegexMatch rm(&re);
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jp::VecNum vec_num;
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size_t count = rm.setSubject(param.expression).setNumberedSubstringVector(&vec_num).match();
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if (count == 0)
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return std::string{};
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return vec_num[0][0];
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}
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/*
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Returns the position of the first occurrence of the regular expression pattern in the string subject, or 0
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if pattern was not found. https://mariadb.com/kb/en/regexp_instr/
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*/
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std::string Func_regexp_instr::getStrVal(rowgroup::Row& row, FunctionParm& fp, bool& isNull,
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execplan::CalpontSystemCatalog::ColType& ct)
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{
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RegExpParams param = getEpressionAndPattern(row, fp, isNull, ct, ct.getTimeZone());
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if (isNull)
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return std::string{};
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const PCREOptions& options = pcreOptions(ct);
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jp::Regex re(param.pattern, options.flags);
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jp::RegexMatch rm(&re);
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jpcre2::VecOff vec_soff;
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size_t count = rm.setSubject(param.expression).setMatchStartOffsetVector(&vec_soff).match();
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if (count == 0)
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return "0";
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size_t offset = vec_soff[0];
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size_t charNumber = ct.getCharset()->numchars(param.expression.c_str(), param.expression.c_str() + offset);
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return std::to_string(charNumber + 1);
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}
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/*
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https://mariadb.com/kb/en/regexp/
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*/
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bool Func_regexp::getBoolVal(rowgroup::Row& row, FunctionParm& fp, bool& isNull,
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CalpontSystemCatalog::ColType& ct)
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{
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RegExpParams param = getEpressionAndPattern(row, fp, isNull, ct, ct.getTimeZone());
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if (isNull)
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return false;
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const PCREOptions& options = pcreOptions(ct);
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jp::Regex re(param.pattern, options.flags);
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return re.match(param.expression);
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}
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} // namespace funcexp
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