mirror of
https://github.com/mariadb-corporation/mariadb-columnstore-engine.git
synced 2025-04-20 09:07:44 +03:00
97 lines
3.1 KiB
C++
97 lines
3.1 KiB
C++
/* Copyright (C) 2017 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. */
|
|
|
|
#include "distinct_count.h"
|
|
#include "calpontsystemcatalog.h"
|
|
|
|
using namespace mcsv1sdk;
|
|
|
|
struct distinct_count_data
|
|
{
|
|
long long cnt;
|
|
};
|
|
|
|
#define OUT_TYPE int64_t
|
|
mcsv1_UDAF::ReturnCode distinct_count::init(mcsv1Context* context, ColumnDatum* colTypes)
|
|
{
|
|
context->setUserDataSize(sizeof(distinct_count_data));
|
|
if (context->getParameterCount() != 1)
|
|
{
|
|
// The error message will be prepended with
|
|
// "The storage engine for the table doesn't support "
|
|
context->setErrorMessage("distinct_count() with other than 1 arguments");
|
|
return mcsv1_UDAF::ERROR;
|
|
}
|
|
context->setResultType(execplan::CalpontSystemCatalog::BIGINT);
|
|
context->setColWidth(8);
|
|
context->setRunFlag(mcsv1sdk::UDAF_IGNORE_NULLS);
|
|
context->setRunFlag(mcsv1sdk::UDAF_DISTINCT);
|
|
context->setRunFlag(mcsv1sdk::UDAF_OVER_REQUIRED);
|
|
|
|
return mcsv1_UDAF::SUCCESS;
|
|
}
|
|
|
|
mcsv1_UDAF::ReturnCode distinct_count::reset(mcsv1Context* context)
|
|
{
|
|
struct distinct_count_data* data = (struct distinct_count_data*)context->getUserData()->data;
|
|
data->cnt = 0;
|
|
return mcsv1_UDAF::SUCCESS;
|
|
}
|
|
|
|
mcsv1_UDAF::ReturnCode distinct_count::nextValue(mcsv1Context* context, ColumnDatum* valsIn)
|
|
{
|
|
static_any::any& valIn = valsIn[0].columnData;
|
|
struct distinct_count_data* data = (struct distinct_count_data*)context->getUserData()->data;
|
|
|
|
if (valIn.empty())
|
|
{
|
|
return mcsv1_UDAF::SUCCESS; // Ought not happen when UDAF_IGNORE_NULLS is on.
|
|
}
|
|
data->cnt++;
|
|
return mcsv1_UDAF::SUCCESS;
|
|
}
|
|
|
|
mcsv1_UDAF::ReturnCode distinct_count::subEvaluate(mcsv1Context* context, const UserData* userDataIn)
|
|
{
|
|
struct distinct_count_data* outData = (struct distinct_count_data*)context->getUserData()->data;
|
|
struct distinct_count_data* inData = (struct distinct_count_data*)userDataIn->data;
|
|
outData->cnt += inData->cnt;
|
|
return mcsv1_UDAF::SUCCESS;
|
|
}
|
|
|
|
mcsv1_UDAF::ReturnCode distinct_count::evaluate(mcsv1Context* context, static_any::any& valOut)
|
|
{
|
|
struct distinct_count_data* data = (struct distinct_count_data*)context->getUserData()->data;
|
|
valOut = data->cnt;
|
|
return mcsv1_UDAF::SUCCESS;
|
|
}
|
|
|
|
mcsv1_UDAF::ReturnCode distinct_count::dropValue(mcsv1Context* context, ColumnDatum* valsDropped)
|
|
{
|
|
static_any::any& valIn = valsDropped[0].columnData;
|
|
struct distinct_count_data* data = (struct distinct_count_data*)context->getUserData()->data;
|
|
|
|
if (valIn.empty())
|
|
{
|
|
return mcsv1_UDAF::SUCCESS; // Ought not happen when UDAF_IGNORE_NULLS is on.
|
|
}
|
|
|
|
data->cnt--;
|
|
|
|
return mcsv1_UDAF::SUCCESS;
|
|
}
|