mariadb-columnstore-engine/dbcon/execplan/returnedcolumn.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: returnedcolumn.cpp 9413 2013-04-22 22:03:42Z zzhu $
*
*
***********************************************************************/

#include <iostream>
#include <string>

#include "bytestream.h"
#include "returnedcolumn.h"
#include "objectreader.h"

using namespace std;
using namespace messageqcpp;

namespace execplan
{
/**
 * Constructors/Destructors
 */
ReturnedColumn::ReturnedColumn(): fReturnAll (false),
    fSessionID(0),
    fSequence(-1),
    fCardinality(0),
    fDistinct(false),
    fJoinInfo(0),
    fAsc(true),
    fNullsFirst(true),
    fOrderPos((uint64_t) - 1),
    fColSource(0),
    fColPosition(-1),
    fHasAggregate(false),
    fInputIndex(-1),
    fOutputIndex(-1),
    fExpressionId ((uint32_t) - 1)
{
}

ReturnedColumn::ReturnedColumn(const string& sql):
    fReturnAll (false),
    fSessionID(0),
    fSequence(-1),
    fCardinality(0),
    fDistinct(false),
    fJoinInfo(0),
    fAsc(true),
    fNullsFirst(true),
    fOrderPos((uint64_t) - 1),
    fColSource(0),
    fColPosition(-1),
    fHasAggregate(false),
    fData(sql),
    fInputIndex(-1),
    fOutputIndex(-1),
    fExpressionId ((uint32_t) - 1)
{
}

ReturnedColumn::ReturnedColumn(const uint32_t sessionID, const bool returnAll):
    fReturnAll(returnAll),
    fSessionID(sessionID),
    fSequence(-1),
    fCardinality(0),
    fDistinct(false),
    fJoinInfo(0),
    fAsc(true),
    fNullsFirst(true),
    fOrderPos((uint64_t) - 1),
    fColSource(0),
    fColPosition(-1),
    fHasAggregate(false),
    fInputIndex(-1),
    fOutputIndex(-1),
    fExpressionId ((uint32_t) - 1)
{
}

ReturnedColumn::ReturnedColumn(const ReturnedColumn& rhs, const uint32_t sessionID):
    TreeNode(rhs),
    fReturnAll(rhs.fReturnAll),
    fSessionID(sessionID),
    fSequence(rhs.fSequence),
    fCardinality(rhs.fCardinality),
    fDistinct(rhs.fDistinct),
    fJoinInfo(rhs.fJoinInfo),
    fAsc(rhs.fAsc),
    fNullsFirst(rhs.fNullsFirst),
    fOrderPos(rhs.fOrderPos),
    fColSource(rhs.fColSource),
    fColPosition(rhs.fColPosition),
    fHasAggregate(rhs.fHasAggregate),
    fData(rhs.fData),
    fInputIndex(rhs.fInputIndex),
    fOutputIndex(rhs.fOutputIndex),
    fExpressionId (rhs.fExpressionId)
{
}

ReturnedColumn::~ReturnedColumn()
{
}

/**
 * ostream function
 */
ostream& operator<<(ostream& output, const ReturnedColumn& retCol)
{
    output << retCol.toString() << endl;
    return output;
}

void ReturnedColumn::serialize(messageqcpp::ByteStream& b) const
{
    b << (ObjectReader::id_t) ObjectReader::RETURNEDCOLUMN;
    b << fData;
    b << (uint64_t) fCardinality;
    b << fAlias;
    b << (uint8_t)fDistinct;
    b << (uint64_t)fJoinInfo;
    b << (uint8_t)fAsc;
    b << (uint8_t)fNullsFirst;
    b << (uint64_t)fOrderPos;
    b << (uint64_t)fColSource;
    b << (int64_t)fColPosition;
    b << (uint32_t)fInputIndex;
    b << (uint32_t)fOutputIndex;
    b << (int32_t)fSequence;
    b << (uint8_t)fReturnAll;
    fResultType.serialize(b);
    fOperationType.serialize(b);
    b << (uint32_t)fExpressionId;
}

void ReturnedColumn::unserialize(messageqcpp::ByteStream& b)
{
    ObjectReader::checkType(b, ObjectReader::RETURNEDCOLUMN);
    b >> fData;
    b >> (uint64_t&)fCardinality;
    b >> fAlias;
    b >> (uint8_t&)fDistinct;
    b >> (uint64_t&)fJoinInfo;
    b >> (uint8_t&)fAsc;
    b >> (uint8_t&)fNullsFirst;
    b >> (uint64_t&)fOrderPos;
    b >> (uint64_t&)fColSource;
    b >> (int64_t&)fColPosition;
    b >> (uint32_t&)fInputIndex;
    b >> (uint32_t&)fOutputIndex;
    b >> (int32_t&)fSequence;
    b >> (uint8_t&)fReturnAll;
    fResultType.unserialize(b);
    fOperationType.unserialize(b);
    b >> (uint32_t&)fExpressionId;
}

bool ReturnedColumn::operator==(const ReturnedColumn& t) const
{
    // Not all fields are considered for a positive equality.
    if (fData != t.fData)
        return false;

    if (fCardinality != t.fCardinality)
        return false;

    if (fDistinct != t.fDistinct)
        return false;

    if (fJoinInfo != t.fJoinInfo)
        return false;

    if (fAsc != t.fAsc)
        return false;

    if (fNullsFirst != t.fNullsFirst)
        return false;

    if (fInputIndex != t.fInputIndex)
        return false;

    if (fOutputIndex != t.fOutputIndex)
        return false;

    if (fResultType != t.fResultType)
        return false;

    if (fOperationType != t.fOperationType)
        return false;

    return true;
}

bool ReturnedColumn::operator==(const TreeNode* t) const
{
    const ReturnedColumn* rc;

    rc = dynamic_cast<const ReturnedColumn*>(t);

    if (rc == NULL)
        return false;

    return *this == *rc;
}

bool ReturnedColumn::operator!=(const ReturnedColumn& t) const
{
    return !(*this == t);
}

bool ReturnedColumn::operator!=(const TreeNode* t) const
{
    return !(*this == t);
}

const string ReturnedColumn::data() const
{
    return fData;
}

const string ReturnedColumn::toString() const
{
    ostringstream oss;
    oss << ">ReturnedColumn " << fJoinInfo << "<" << endl;
    return oss.str();
}

// All columns that may have simple column added to the list need to implement
// this function. Default behavior is to have no SC added to the list so
// fSimpleColumnList will be cleared.
void ReturnedColumn::setSimpleColumnList()
{
    fSimpleColumnList.clear();
}


} // namespace execplan