mariadb-columnstore-engine/dbcon/dmlpackage/deletedmlpackage.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: deletedmlpackage.cpp 9210 2013-01-21 14:10:42Z rdempsey $
 *
 *
 ***********************************************************************/
#include <stdexcept>
#include <iostream>
#include <boost/tokenizer.hpp>
#include <string>
#include <cstdlib>
using namespace std;
#define DELETEDMLPKG_DLLEXPORT
#include "deletedmlpackage.h"
#undef DELETEDMLPKG_DLLEXPORT

namespace dmlpackage
{
DeleteDMLPackage::DeleteDMLPackage()
{
}

DeleteDMLPackage::DeleteDMLPackage(std::string schemaName, std::string tableName, std::string dmlStatement,
                                   int sessionID)
 : CalpontDMLPackage(schemaName, tableName, dmlStatement, sessionID)
{
}

DeleteDMLPackage::~DeleteDMLPackage()
{
}

int DeleteDMLPackage::write(messageqcpp::ByteStream& bytestream)
{
  int retval = 1;

  messageqcpp::ByteStream::byte package_type = DML_DELETE;
  bytestream << package_type;

  messageqcpp::ByteStream::quadbyte session_id = fSessionID;
  bytestream << session_id;

  /*   if(fPlan != 0)
         fHasFilter = true;
     else
         fHasFilter = false;
  */
  messageqcpp::ByteStream::quadbyte hasFilter = fHasFilter;
  bytestream << hasFilter;

  bytestream << fUuid;

  bytestream << fDMLStatement;
  bytestream << fSQLStatement;
  bytestream << fSchemaName;
  bytestream << fTimeZone;

  if (fTable != 0)
  {
    retval = fTable->write(bytestream);
  }

  if (fHasFilter)
  {
    bytestream += *(fPlan.get());
  }

  return retval;
}
/**
 *
 */
int DeleteDMLPackage::read(messageqcpp::ByteStream& bytestream)
{
  int retval = 1;

  messageqcpp::ByteStream::quadbyte session_id;
  messageqcpp::ByteStream::quadbyte hasFilter;

  bytestream >> session_id;
  fSessionID = session_id;

  bytestream >> hasFilter;
  fHasFilter = (hasFilter != 0);

  bytestream >> fUuid;

  std::string dmlStatement;
  bytestream >> fDMLStatement;
  bytestream >> fSQLStatement;
  bytestream >> fSchemaName;
  bytestream >> fTimeZone;

  fTable = new DMLTable();
  retval = fTable->read(bytestream);

  if (fHasFilter)
  {
    fPlan.reset(new messageqcpp::ByteStream(bytestream));
  }

  return retval;
}

int DeleteDMLPackage::buildFromSqlStatement(SqlStatement& sqlStatement)
{
  int retval = 1;

  DeleteSqlStatement& deleteStmt = dynamic_cast<DeleteSqlStatement&>(sqlStatement);

  initializeTable();

  if (0 != deleteStmt.fWhereClausePtr)
  {
    fHasFilter = true;
    fQueryString = deleteStmt.getQueryString();
  }

  // else all rows are deleted

  return retval;
}

/**
 *
 */
int DeleteDMLPackage::buildFromBuffer(std::string& buffer, int columns, int rows)
{
#ifdef DML_PACKAGE_DEBUG
  // cout << "The data buffer received: " << buffer << endl;
#endif

  int retval = 1;

  initializeTable();

  std::vector<std::string> dataList;
  typedef boost::tokenizer<boost::char_separator<char> > tokenizer;
  boost::char_separator<char> sep(":");
  tokenizer tokens(buffer, sep);

  for (tokenizer::iterator tok_iter = tokens.begin(); tok_iter != tokens.end(); ++tok_iter)
  {
    dataList.push_back(StripLeadingWhitespace(*tok_iter));
  }

  int n = 0;

  for (int i = 0; i < rows; i++)
  {
    // get a new row
    Row aRow;
    // Row *aRowPtr = new Row();
    // std::string colName;
    // std::string colValue;
    // get row ID from the buffer
    std::string rowid = dataList[n++];
    aRow.set_RowID(atoll(rowid.c_str()));
    // aRowPtr->set_RowID(atol(rowid.c_str()));
#ifdef DML_PACKAGE_DEBUG

    // cout << "The row ID is " << rowid << endl;
#endif
    /*
            for (int j = 0; j < columns; j++)
            {
                //Build a column list
                colName = dataList[n++];
                colValue = dataList[n++];
    #ifdef DML_PACKAGE_DEBUG
                cout << "The column data: " << colName << " " << colValue << endl;
    #endif
                DMLColumn* aColumn = new DMLColumn(colName, colValue);
                (aRowPtr->get_ColumnList()).push_back(aColumn);
    }
    //build a row list for a table
    fTable->get_RowList().push_back(aRowPtr);
    */
  }

  return retval;
}

int DeleteDMLPackage::buildFromMysqlBuffer(ColNameList& colNameList, TableValuesMap& tableValuesMap,
                                           int columns, int rows, NullValuesBitset& nullValues)
{
  int retval = 1;

  initializeTable();
  // The row already built from MySql parser.
  /*  Row *aRowPtr = new Row();
      std::string colName;
      std::vector<std::string> colValList;
      for (int j = 0; j < columns; j++)
      {
        //Build a column list
        colName = colNameList[j];

        colValList = tableValuesMap[j];

        DMLColumn* aColumn = new DMLColumn(colName, colValList, false);
        (aRowPtr->get_ColumnList()).push_back(aColumn);
      }
      //build a row list for a table
      fTable->get_RowList().push_back(aRowPtr); */
  return retval;
}

}  // namespace dmlpackage