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f3766e40e4ae5114acf32fe735369c7ea5cbf250
mariadb-columnstore-engine/utils/funcexp/func_ceil.cpp
Alexander Barkov e19096a91a A joint patch fixing MCOL-4618 and MCOL-4653: 
- MCOL-4618 FLOOR(-9999.0) returns a bad result
- MCOL-4653 CEIL(negativeNarrowDecimal) returns a wrong result

Main changes:
a. Moving ROUND, CEIL, FLOOR related code into a new simple
   class template DecomposedDecimal, which is reused for
   64 and 128 bit decimal.
b. Using DecomposedDecimal in TDecimal64 and TDecimal128
   to implement ROUND, CEIL, FLOOR related methods.
c. Adding corresponding wrapper methods to the class Decimal.
d. Using new Decimal methods in Func_ceil and Func_floor.

Additional minor changed:
- Adding "explicit" to TSInt128 constructors to avoid
  hidden data type conversion and erroneous choice between
  64 vs 128 bit APIs when using Decimal.
  Now one can call constructors in this self explanatory way:
  - Decimal(TSInt128(some_int_value), scale, precision)
    to create a wide decimal
  - Decimal(TSInt64(some_int_value, scale, precision)
    to create a narrow decimal

  TODO:
  Consider changing
    Decimal(int64_t val, int8_t s, uint8_t p, const int128_t &val128 = 0)
  to
    Decimal(int64_t val, int8_t s, uint8_t p, const int128_t &val128)
  (or even removing this constructor) to disallow compilation of:
    Decimal(some_trivial_type_value, scale, precision)
2021-04-01 09:47:22 +04:00

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/* Copyright (C) 2014 InfiniDB, Inc.
Copyright (C) 2019 MariaDB Corporation
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; version 2 of
the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301, USA. */
/****************************************************************************
* $Id: func_ceil.cpp 3923 2013-06-19 21:43:06Z bwilkinson $
*
*
****************************************************************************/
#include <cstdlib>
#include <iomanip>
#include <string>
using namespace std;
#include "functor_real.h"
#include "functioncolumn.h"
using namespace execplan;
#include "rowgroup.h"
using namespace rowgroup;
#include "errorcodes.h"
#include "idberrorinfo.h"
#include "errorids.h"
using namespace logging;
using namespace dataconvert;
#include "funchelpers.h"
namespace funcexp
{
CalpontSystemCatalog::ColType Func_ceil::operationType(FunctionParm& fp, CalpontSystemCatalog::ColType& resultType)
{
return fp[0]->data()->resultType();
}
int64_t Func_ceil::getIntVal(Row& row,
FunctionParm& parm,
bool& isNull,
CalpontSystemCatalog::ColType& op_ct)
{
int64_t ret = 0;
switch (op_ct.colDataType)
{
case CalpontSystemCatalog::BIGINT:
case CalpontSystemCatalog::INT:
case CalpontSystemCatalog::MEDINT:
case CalpontSystemCatalog::TINYINT:
case CalpontSystemCatalog::SMALLINT:
{
ret = parm[0]->data()->getIntVal(row, isNull);
}
break;
// ceil(decimal(X,Y)) leads to this path if X, Y allows to
// downcast to INT otherwise Func_ceil::getDecimalVal() is called
case execplan::CalpontSystemCatalog::DECIMAL:
case execplan::CalpontSystemCatalog::UDECIMAL:
{
if (op_ct.scale == 0)
{
ret = parm[0]->data()->getIntVal(row, isNull);
break;
}
IDB_Decimal d = parm[0]->data()->getDecimalVal(row, isNull);
if (isNull)
break;
// negative scale is not supported by CNX yet
if (d.scale > 0)
{
if (d.scale > datatypes::INT128MAXPRECISION)
{
std::ostringstream oss;
oss << "ceil: datatype of " << execplan::colDataTypeToString(op_ct.colDataType)
<< " with scale " << (int) d.scale << " is beyond supported scale";
throw logging::IDBExcept(oss.str(), ERR_DATATYPE_NOT_SUPPORT);
}
ret = d.toSInt64Ceil();
}
}
break;
case CalpontSystemCatalog::UBIGINT:
case CalpontSystemCatalog::UINT:
case CalpontSystemCatalog::UMEDINT:
case CalpontSystemCatalog::UTINYINT:
case CalpontSystemCatalog::USMALLINT:
{
ret = (int64_t)(parm[0]->data()->getUintVal(row, isNull));
}
break;
case CalpontSystemCatalog::DOUBLE:
case CalpontSystemCatalog::UDOUBLE:
case CalpontSystemCatalog::FLOAT:
case CalpontSystemCatalog::UFLOAT:
{
ret = (int64_t) ceil(parm[0]->data()->getDoubleVal(row, isNull));
}
break;
case CalpontSystemCatalog::LONGDOUBLE:
{
ret = (int64_t) ceill(parm[0]->data()->getLongDoubleVal(row, isNull));
}
break;
case CalpontSystemCatalog::VARCHAR:
case CalpontSystemCatalog::CHAR:
case CalpontSystemCatalog::TEXT:
{
const string& str = parm[0]->data()->getStrVal(row, isNull);
if (!isNull)
ret = (int64_t) ceil(strtod(str.c_str(), 0));
}
break;
case CalpontSystemCatalog::DATE:
{
// For some reason, MDB doesn't return this as a date,
// but datetime is returned as a datetime. Expect
// this to change in the future.
Date d (parm[0]->data()->getDateIntVal(row, isNull));
if (!isNull)
ret = d.convertToMySQLint();
}
break;
case CalpontSystemCatalog::DATETIME:
{
ret = parm[0]->data()->getDatetimeIntVal(row, isNull);
}
break;
case CalpontSystemCatalog::TIMESTAMP:
{
ret = parm[0]->data()->getTimestampIntVal(row, isNull);
}
break;
case CalpontSystemCatalog::TIME:
{
ret = parm[0]->data()->getTimeIntVal(row, isNull);
}
break;
default:
{
std::ostringstream oss;
oss << "ceil: datatype of " << colDataTypeToString(op_ct.colDataType)
<< " is not supported";
throw logging::IDBExcept(oss.str(), ERR_DATATYPE_NOT_SUPPORT);
}
}
return ret;
}
uint64_t Func_ceil::getUintVal(Row& row,
FunctionParm& parm,
bool& isNull,
CalpontSystemCatalog::ColType& op_ct)
{
uint64_t ret = 0;
switch (op_ct.colDataType)
{
case CalpontSystemCatalog::BIGINT:
case CalpontSystemCatalog::INT:
case CalpontSystemCatalog::MEDINT:
case CalpontSystemCatalog::TINYINT:
case CalpontSystemCatalog::SMALLINT:
{
ret = (uint64_t)parm[0]->data()->getIntVal(row, isNull);
}
break;
// ceil(decimal(X,Y)) leads to this path if X, Y allows to
// downcast to INT otherwise Func_ceil::getDecimalVal() is called
case execplan::CalpontSystemCatalog::DECIMAL:
case execplan::CalpontSystemCatalog::UDECIMAL:
{
if (op_ct.scale == 0)
{
ret = parm[0]->data()->getIntVal(row, isNull);
break;
}
IDB_Decimal d = parm[0]->data()->getDecimalVal(row, isNull);
if (isNull)
break;
// negative scale is not supported by CNX yet
if (d.scale > 0)
{
if (d.scale > datatypes::INT128MAXPRECISION)
{
std::ostringstream oss;
oss << "ceil: datatype of " << execplan::colDataTypeToString(op_ct.colDataType)
<< " with scale " << (int) d.scale << " is beyond supported scale";
throw logging::IDBExcept(oss.str(), ERR_DATATYPE_NOT_SUPPORT);
}
ret = d.toUInt64Ceil();
}
}
break;
case CalpontSystemCatalog::UBIGINT:
case CalpontSystemCatalog::UINT:
case CalpontSystemCatalog::UMEDINT:
case CalpontSystemCatalog::UTINYINT:
case CalpontSystemCatalog::USMALLINT:
{
ret = (parm[0]->data()->getUintVal(row, isNull));
}
break;
case CalpontSystemCatalog::DOUBLE:
case CalpontSystemCatalog::UDOUBLE:
case CalpontSystemCatalog::FLOAT:
case CalpontSystemCatalog::UFLOAT:
{
ret = (uint64_t) ceil(parm[0]->data()->getDoubleVal(row, isNull));
}
break;
case CalpontSystemCatalog::LONGDOUBLE:
{
ret = (uint64_t) ceill(parm[0]->data()->getLongDoubleVal(row, isNull));
}
break;
case CalpontSystemCatalog::VARCHAR:
case CalpontSystemCatalog::CHAR:
case CalpontSystemCatalog::TEXT:
{
const string& str = parm[0]->data()->getStrVal(row, isNull);
if (!isNull)
ret = (uint64_t) ceil(strtod(str.c_str(), 0));
}
break;
case CalpontSystemCatalog::DATE:
{
// For some reason, MDB doesn't return this as a date,
// but datetime is returned as a datetime. Expect
// this to change in the future.
Date d (parm[0]->data()->getDateIntVal(row, isNull));
if (!isNull)
ret = d.convertToMySQLint();
}
break;
case CalpontSystemCatalog::DATETIME:
{
ret = parm[0]->data()->getDatetimeIntVal(row, isNull);
}
break;
case CalpontSystemCatalog::TIMESTAMP:
{
ret = parm[0]->data()->getTimestampIntVal(row, isNull);
}
break;
case CalpontSystemCatalog::TIME:
{
ret = parm[0]->data()->getTimeIntVal(row, isNull);
}
break;
default:
{
std::ostringstream oss;
oss << "ceil: datatype of " << colDataTypeToString(op_ct.colDataType)
<< " is not supported";
throw logging::IDBExcept(oss.str(), ERR_DATATYPE_NOT_SUPPORT);
}
}
return ret;
}
double Func_ceil::getDoubleVal(Row& row,
FunctionParm& parm,
bool& isNull,
CalpontSystemCatalog::ColType& op_ct)
{
double ret = 0.0;
if (op_ct.colDataType == CalpontSystemCatalog::DOUBLE ||
op_ct.colDataType == CalpontSystemCatalog::UDOUBLE ||
op_ct.colDataType == CalpontSystemCatalog::FLOAT ||
op_ct.colDataType == CalpontSystemCatalog::UFLOAT)
{
ret = ceil(parm[0]->data()->getDoubleVal(row, isNull));
}
else if (op_ct.colDataType == CalpontSystemCatalog::VARCHAR ||
op_ct.colDataType == CalpontSystemCatalog::CHAR ||
op_ct.colDataType == CalpontSystemCatalog::TEXT)
{
const string& str = parm[0]->data()->getStrVal(row, isNull);
if (!isNull)
ret = ceil(strtod(str.c_str(), 0));
}
else if (op_ct.colDataType == CalpontSystemCatalog::LONGDOUBLE)
{
ret = (double)ceill(parm[0]->data()->getLongDoubleVal(row, isNull));
}
else if (op_ct.colDataType == CalpontSystemCatalog::DECIMAL ||
op_ct.colDataType == CalpontSystemCatalog::UDECIMAL)
{
IDB_Decimal tmp = getDecimalVal(row, parm, isNull, op_ct);
if (op_ct.colWidth == datatypes::MAXDECIMALWIDTH)
{
ret = static_cast<double>(tmp.toTSInt128());
}
else
{
ret = (double) tmp.value;
}
}
else
{
if (isUnsigned(op_ct.colDataType))
{
ret = (double) getUintVal(row, parm, isNull, op_ct);
}
else
{
ret = (double) getIntVal(row, parm, isNull, op_ct);
}
}
return ret;
}
long double Func_ceil::getLongDoubleVal(Row& row,
FunctionParm& parm,
bool& isNull,
CalpontSystemCatalog::ColType& op_ct)
{
long double ret = 0.0;
if (op_ct.colDataType == CalpontSystemCatalog::LONGDOUBLE)
{
ret = ceill(parm[0]->data()->getLongDoubleVal(row, isNull));
}
else if (op_ct.colDataType == CalpontSystemCatalog::DOUBLE ||
op_ct.colDataType == CalpontSystemCatalog::UDOUBLE ||
op_ct.colDataType == CalpontSystemCatalog::FLOAT ||
op_ct.colDataType == CalpontSystemCatalog::UFLOAT)
{
ret = ceil(parm[0]->data()->getDoubleVal(row, isNull));
}
else if (op_ct.colDataType == CalpontSystemCatalog::VARCHAR ||
op_ct.colDataType == CalpontSystemCatalog::CHAR ||
op_ct.colDataType == CalpontSystemCatalog::TEXT)
{
const string& str = parm[0]->data()->getStrVal(row, isNull);
if (!isNull)
ret = ceil(strtod(str.c_str(), 0));
}
else if (op_ct.colDataType == CalpontSystemCatalog::DECIMAL ||
op_ct.colDataType == CalpontSystemCatalog::UDECIMAL)
{
IDB_Decimal tmp = getDecimalVal(row, parm, isNull, op_ct);
if (op_ct.colWidth == datatypes::MAXDECIMALWIDTH)
{
ret = static_cast<long double>(tmp.toTSInt128());
}
else
{
ret = (long double) tmp.value;
}
}
else
{
if (isUnsigned(op_ct.colDataType))
{
ret = (double) getUintVal(row, parm, isNull, op_ct);
}
else
{
ret = (double) getIntVal(row, parm, isNull, op_ct);
}
}
return ret;
}
string Func_ceil::getStrVal(Row& row,
FunctionParm& parm,
bool& isNull,
CalpontSystemCatalog::ColType& op_ct)
{
char tmp[512] = {'\0'};
if (op_ct.colDataType == CalpontSystemCatalog::DOUBLE ||
op_ct.colDataType == CalpontSystemCatalog::UDOUBLE ||
op_ct.colDataType == CalpontSystemCatalog::FLOAT ||
op_ct.colDataType == CalpontSystemCatalog::UFLOAT ||
op_ct.colDataType == CalpontSystemCatalog::VARCHAR ||
op_ct.colDataType == CalpontSystemCatalog::CHAR ||
op_ct.colDataType == CalpontSystemCatalog::TEXT)
{
snprintf(tmp, 511, "%f", getDoubleVal(row, parm, isNull, op_ct));
// remove the decimals in the oss string.
char* d = tmp;
while ((*d != '.') && (*d != '\0'))
d++;
*d = '\0';
}
else if (op_ct.colDataType == CalpontSystemCatalog::LONGDOUBLE)
{
snprintf(tmp, 511, "%Lf", getLongDoubleVal(row, parm, isNull, op_ct));
// remove the decimals in the oss string.
char* d = tmp;
while ((*d != '.') && (*d != '\0'))
d++;
*d = '\0';
}
else if (op_ct.colDataType == CalpontSystemCatalog::DECIMAL ||
op_ct.colDataType == CalpontSystemCatalog::UDECIMAL)
{
IDB_Decimal d = getDecimalVal(row, parm, isNull, op_ct);
if (op_ct.colWidth == datatypes::MAXDECIMALWIDTH)
{
return d.toString(true);
}
else
{
return d.toString();
}
}
else if (isUnsigned(op_ct.colDataType))
{
#ifndef __LP64__
snprintf(tmp, 511, "%llu", getUintVal(row, parm, isNull, op_ct));
#else
snprintf(tmp, 511, "%lu", getUintVal(row, parm, isNull, op_ct));
#endif
}
else
{
#ifndef __LP64__
snprintf(tmp, 511, "%lld", getIntVal(row, parm, isNull, op_ct));
#else
snprintf(tmp, 511, "%ld", getIntVal(row, parm, isNull, op_ct));
#endif
}
return string(tmp);
}
IDB_Decimal Func_ceil::getDecimalVal(Row& row,
FunctionParm& parm,
bool& isNull,
CalpontSystemCatalog::ColType& op_ct)
{
// Questionable approach. I believe we should use pointer here
// and call an appropriate ctor
IDB_Decimal ret;
switch (op_ct.colDataType)
{
case execplan::CalpontSystemCatalog::BIGINT:
case execplan::CalpontSystemCatalog::INT:
case execplan::CalpontSystemCatalog::MEDINT:
case execplan::CalpontSystemCatalog::TINYINT:
case execplan::CalpontSystemCatalog::SMALLINT:
{
ret.value = parm[0]->data()->getIntVal(row, isNull);
}
break;
case execplan::CalpontSystemCatalog::DECIMAL:
case execplan::CalpontSystemCatalog::UDECIMAL:
{
ret = parm[0]->data()->getDecimalVal(row, isNull);
if (isNull)
break;
// negative scale is not supported by CNX yet
if (ret.scale > 0)
{
if (ret.scale > datatypes::INT128MAXPRECISION)
{
std::ostringstream oss;
oss << "ceil: datatype of " << execplan::colDataTypeToString(op_ct.colDataType)
<< " with scale " << (int) ret.scale << " is beyond supported scale";
throw logging::IDBExcept(oss.str(), ERR_DATATYPE_NOT_SUPPORT);
}
return ret.ceil();
}
}
break;
case execplan::CalpontSystemCatalog::UBIGINT:
case execplan::CalpontSystemCatalog::UINT:
case execplan::CalpontSystemCatalog::UMEDINT:
case execplan::CalpontSystemCatalog::UTINYINT:
case execplan::CalpontSystemCatalog::USMALLINT:
{
ret.value = (int64_t)parm[0]->data()->getUintVal(row, isNull);
}
break;
case execplan::CalpontSystemCatalog::DOUBLE:
case execplan::CalpontSystemCatalog::UDOUBLE:
case execplan::CalpontSystemCatalog::FLOAT:
case execplan::CalpontSystemCatalog::UFLOAT:
{
ret.value = (int64_t) ceil(parm[0]->data()->getDoubleVal(row, isNull));
}
break;
case execplan::CalpontSystemCatalog::LONGDOUBLE:
{
ret.value = (int64_t) ceill(parm[0]->data()->getLongDoubleVal(row, isNull));
}
break;
case execplan::CalpontSystemCatalog::VARCHAR:
case execplan::CalpontSystemCatalog::CHAR:
case execplan::CalpontSystemCatalog::TEXT:
{
const string& str = parm[0]->data()->getStrVal(row, isNull);
if (!isNull)
ret.value = (int64_t) ceil(strtod(str.c_str(), 0));
}
break;
case CalpontSystemCatalog::DATE:
{
Date d (parm[0]->data()->getDateIntVal(row, isNull));
if (!isNull)
ret.value = d.convertToMySQLint();
}
break;
case CalpontSystemCatalog::DATETIME:
{
DateTime dt(parm[0]->data()->getDatetimeIntVal(row, isNull));
if (!isNull)
ret.value = dt.convertToMySQLint();
}
break;
case CalpontSystemCatalog::TIMESTAMP:
{
TimeStamp dt(parm[0]->data()->getTimestampIntVal(row, isNull));
if (!isNull)
ret.value = dt.convertToMySQLint(timeZone());
}
break;
case CalpontSystemCatalog::TIME:
{
Time dt(parm[0]->data()->getTimeIntVal(row, isNull));
if (!isNull)
ret.value = dt.convertToMySQLint();
}
break;
default:
{
std::ostringstream oss;
oss << "ceil: datatype of " << colDataTypeToString(op_ct.colDataType)
<< " is not supported";
throw logging::IDBExcept(oss.str(), ERR_DATATYPE_NOT_SUPPORT);
}
}
ret.scale = 0;
return ret;
}
} // namespace funcexp
// vim:ts=4 sw=4:
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