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120 lines
3.4 KiB
C++
120 lines
3.4 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_period_diff.cpp 2477 2011-04-01 16:07:35Z 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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#include <sstream>
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using namespace std;
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#include "functor_int.h"
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#include "funchelpers.h"
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#include "functioncolumn.h"
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#include "rowgroup.h"
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using namespace execplan;
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#include "dataconvert.h"
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namespace funcexp
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{
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#define YY_PART_YEAR 70
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inline uint64_t convert_period_to_month(uint64_t period)
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{
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uint64_t a, b;
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if (period == 0 || period > 999912)
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return 0L;
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if ((a = period / 100) < YY_PART_YEAR)
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a += 2000;
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else if (a < 100)
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a += 1900;
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b = period % 100;
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return a * 12 + b - 1;
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}
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int64_t getArgSInt64Val(rowgroup::Row& row, TreeNode* exp, bool& isNull)
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{
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switch (exp->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::DATE:
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case execplan::CalpontSystemCatalog::DATETIME:
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case execplan::CalpontSystemCatalog::TIMESTAMP: return exp->getIntVal(row, isNull);
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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 = exp->getDecimalVal(row, isNull);
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return d.toSInt64Round();
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}
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case execplan::CalpontSystemCatalog::VARCHAR:
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case execplan::CalpontSystemCatalog::CHAR:
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case execplan::CalpontSystemCatalog::TEXT:
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{
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const auto& str = exp->getStrVal(row, isNull);
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return str.isNull() ? 0 : atoi(str.str());
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}
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case execplan::CalpontSystemCatalog::DOUBLE:
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case execplan::CalpontSystemCatalog::FLOAT:
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{
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datatypes::TDouble d(exp->getDoubleVal(row, isNull));
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return d.toMCSSInt64Round();
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}
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default: isNull = true;
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}
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return 0;
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}
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CalpontSystemCatalog::ColType Func_period_diff::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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int64_t Func_period_diff::getIntVal(rowgroup::Row& row, FunctionParm& parm, bool& isNull,
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CalpontSystemCatalog::ColType& /*op_ct*/)
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{
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uint64_t period1 = (uint64_t)getArgSInt64Val(row, parm[0]->data(), isNull);
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if (isNull)
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return 0;
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uint64_t period2 = (uint64_t)getArgSInt64Val(row, parm[1]->data(), isNull);
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if (isNull)
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return 0;
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return convert_period_to_month(period1) - convert_period_to_month(period2);
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}
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} // namespace funcexp
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