mariadb-columnstore-engine/dbcon/joblist/virtualtable.cpp

/* Copyright (C) 2014 InfiniDB, Inc.

   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: virtualtable.cpp 6412 2010-03-29 04:58:09Z xlou $

#include <iostream>
//#define NDEBUG
#include <cassert>
using namespace std;

#include <boost/scoped_ptr.hpp>
#include <boost/shared_ptr.hpp>
using namespace boost;

#include "errorids.h"
#include "exceptclasses.h"
using namespace logging;

#include "returnedcolumn.h"
#include "aggregatecolumn.h"
#include "windowfunctioncolumn.h"
#include "arithmeticcolumn.h"
#include "constantcolumn.h"
#include "functioncolumn.h"
#include "simplecolumn.h"
using namespace execplan;

#include "jobstep.h"
#include "jlf_tuplejoblist.h"
#include "virtualtable.h"

namespace joblist
{
VirtualTable::VirtualTable() : fTableOid(CNX_VTABLE_ID), fVarBinOK(false)
{
}

void VirtualTable::initialize()
{
}

void VirtualTable::addColumn(const SRCP& column)
{
  // As of bug3695, make sure varbinary is not used in subquery.
  if (column->resultType().colDataType == CalpontSystemCatalog::VARBINARY && !fVarBinOK)
    throw runtime_error("VARBINARY in subquery is not supported.");

  AggregateColumn* agc = NULL;
  ArithmeticColumn* arc = NULL;
  ConstantColumn* cc = NULL;
  FunctionColumn* fc = NULL;
  SimpleColumn* sc = NULL;
  WindowFunctionColumn* wc = NULL;

  string columnName;
  ostringstream oss;
  UniqId colId;

  if ((sc = dynamic_cast<SimpleColumn*>(column.get())) != NULL)
  {
    if (sc->schemaName().empty())
      sc->oid(fTableOid + sc->colPosition() + 1);

    columnName = sc->columnName();
    colId = UniqId(sc);
  }
  else if ((agc = dynamic_cast<AggregateColumn*>(column.get())) != NULL)
  {
    //		oss << agc->functionName() << "_" << agc->expressionId();
    //		oss << "Aggregate_" << agc->expressionId();
    columnName = agc->data();
    colId = UniqId(agc->expressionId(), "", "", "");
  }
  else if ((wc = dynamic_cast<WindowFunctionColumn*>(column.get())) != NULL)
  {
    //		oss << wc->functionName() << "_" << wc->expressionId();
    //		oss << "Window_" << wc->expressionId();
    columnName = wc->data();
    colId = UniqId(wc->expressionId(), "", "", "");
  }
  else if ((arc = dynamic_cast<ArithmeticColumn*>(column.get())) != NULL)
  {
    //		oss << "Arithmetic_" << arc->expressionId();
    columnName = arc->data();
    colId = UniqId(arc->expressionId(), "", "", "");
  }
  else if ((fc = dynamic_cast<FunctionColumn*>(column.get())) != NULL)
  {
    //		oss << fc->functionName() << "_" << fc->expressionId();
    columnName = fc->data();
    colId = UniqId(fc->expressionId(), "", "", "");
  }
  else if ((cc = dynamic_cast<ConstantColumn*>(column.get())) != NULL)
  {
    //		oss << "Constant_" << cc->expressionId();
    columnName = cc->data();
    colId = UniqId(cc->expressionId(), cc->alias(), "", fView);
  }
  else  // new column type has added, but this code is not updated.
  {
    auto& columnType = *(column.get());
    oss << "not supported column type: " << typeid(columnType).name();
    throw runtime_error(oss.str());
  }

  if (columnName.empty())
    columnName = column->alias();

  SimpleColumn* vc = new SimpleColumn();
  vc->tableName(fName);
  vc->tableAlias(fAlias);
  vc->columnName(columnName);
  vc->alias(column->alias());
  vc->viewName(fView);

  uint32_t index = fColumns.size();
  vc->colPosition(index);
  vc->oid(fTableOid + index + 1);
  vc->resultType(column->resultType());

  SSC ssc(vc);
  fColumns.push_back(ssc);
  fColumnTypes.push_back(column->resultType());
  fColumnMap.insert(make_pair(colId, index));
}

const CalpontSystemCatalog::OID& VirtualTable::columnOid(uint32_t i) const
{
  idbassert(i < fColumns.size());
  return fColumns[i]->oid();
}

void VirtualTable::columnType(CalpontSystemCatalog::ColType& type, uint32_t i)
{
  idbassert(i < fColumnTypes.size());
  fColumnTypes[i] = type;
  fColumns[i]->resultType(type);
}

const CalpontSystemCatalog::ColType& VirtualTable::columnType(uint32_t i) const
{
  idbassert(i < fColumnTypes.size());
  return fColumnTypes[i];
}

}  // namespace joblist