MySQL数据库

开发平台：
Visual C++

NdbSchemaOp.cpp：源码内容
							/* Copyright (C) 2003 MySQL AB
   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; either version 2 of the License, or
   (at your option) any later version.
   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
/*****************************************************************************
Name:          NdbSchemaOp.cpp
Include:
Link:
Author:        UABMNST Mona Natterkvist UAB/B/SD
               EMIKRON Mikael Ronstrom                         
Date:          040524
Version:       3.0
Description:   Interface between application and NDB
Documentation: Handles createTable and createAttribute calls
Adjust:  980125  UABMNST   First version.
         020826  EMIKRON   New version for new DICT
         040524  Magnus Svensson - Adapted to not be included in public NdbApi
                                   unless the user wants to use it.
  NOTE: This file is only used as a compatibility layer for old test programs,
        New programs should use NdbDictionary.hpp
*****************************************************************************/
#include <ndb_global.h>
#include <NdbApi.hpp>
#include <NdbSchemaOp.hpp>
#include <NdbSchemaCon.hpp>
/*****************************************************************************
NdbSchemaOp(Ndb* aNdb, Table* aTable);
Return Value:  None
Parameters:    aNdb: Pointers to the Ndb object.
               aTable: Pointers to the Table object
Remark:        Creat an object of NdbSchemaOp. 
*****************************************************************************/
NdbSchemaOp::NdbSchemaOp(Ndb* aNdb) : 
  theNdb(aNdb),
  theSchemaCon(NULL),
  m_currentTable(NULL)
{
}//NdbSchemaOp::NdbSchemaOp()
/*****************************************************************************
~NdbSchemaOp();
Remark:         Delete tables for connection pointers (id).
*****************************************************************************/
NdbSchemaOp::~NdbSchemaOp( )
{
}//~NdbSchemaOp::NdbSchemaOp()
     
/*****************************************************************************
int createTable( const char* tableName )
*****************************************************************************/
int
NdbSchemaOp::createTable(const char* aTableName, 
                         Uint32 aTableSize, 
                         KeyType aTupleKey,
                         int aNrOfPages, 
                         FragmentType aFragmentType, 
                         int aKValue,
                         int aMinLoadFactor,
                         int aMaxLoadFactor,
                         int aMemoryType,
                         bool aStoredTable)
{
  if(m_currentTable != 0){
    return -1;
  }
  m_currentTable = new NdbDictionary::Table(aTableName);
  m_currentTable->setKValue(aKValue);
  m_currentTable->setMinLoadFactor(aMinLoadFactor);
  m_currentTable->setMaxLoadFactor(aMaxLoadFactor);
  m_currentTable->setLogging(aStoredTable);
  m_currentTable->setFragmentType(NdbDictionary::Object::FragAllMedium);
  return 0;
}//NdbSchemaOp::createTable()
/******************************************************************************
int createAttribute( const char* anAttrName,            
                         KeyType aTupleyKey,            
                             int anAttrSize,                    
                             int anArraySize,                           
                        AttrType anAttrType,
                        SafeType aSafeType,             
                     StorageMode aStorageMode,
                             int aNullAttr,
                             int aStorageAttr );
******************************************************************************/
int     
NdbSchemaOp::createAttribute( const char* anAttrName,                   
                              KeyType aTupleKey,                        
                              int anAttrSize,                   
                              int anArraySize,                          
                              AttrType anAttrType,      
                              StorageMode aStorageMode,
                              bool nullable,
                              StorageAttributeType aStorageAttr,
			      int aDistributionKeyFlag,
			      int aDistributionGroupFlag,
			      int aDistributionGroupNoOfBits,
                              bool aAutoIncrement,
                              const char* aDefaultValue)
{
  if (m_currentTable == 0){
    return -1;
  }//if
  
  NdbDictionary::Column col(anAttrName);
  switch(anAttrType){
  case Signed:
    if(anAttrSize == 64)
      col.setType(NdbDictionary::Column::Bigint);
    else
      col.setType(NdbDictionary::Column::Int);
    break;
  case UnSigned:
    if(anAttrSize == 64)
      col.setType(NdbDictionary::Column::Bigunsigned);
    else
      col.setType(NdbDictionary::Column::Unsigned);
    break;
  case Float:
    if(anAttrSize == 64)
      col.setType(NdbDictionary::Column::Double);
    else
      col.setType(NdbDictionary::Column::Float);
    break;
  case String:
    col.setType(NdbDictionary::Column::Char);
    break;
  case NoAttrTypeDef:
    abort();
  }
  col.setLength(anArraySize);
  col.setNullable(nullable);
  if(aTupleKey != NoKey)
    col.setPrimaryKey(true);
  else
    col.setPrimaryKey(false);
  col.setDistributionKey(aDistributionKeyFlag);
  col.setDistributionGroup(aDistributionGroupFlag,aDistributionGroupNoOfBits);
  col.setAutoIncrement(aAutoIncrement);
  col.setDefaultValue(aDefaultValue != 0 ? aDefaultValue : "");
  
  m_currentTable->addColumn(col);
  return 0;      
}
/******************************************************************************
void release();
Remark:        Release all objects connected to the schemaop object.
******************************************************************************/
void
NdbSchemaOp::release(){
}//NdbSchemaOp::release()
/******************************************************************************
int sendRec()
Return Value:   Return 0 : send was succesful.
                Return -1: In all other case.   
Parameters:
Remark:         Send and receive signals for schema transaction based on state
******************************************************************************/
int
NdbSchemaOp::sendRec(){
  int retVal = 0;
  if(m_currentTable == 0){
    retVal = -1;
  } else {
    retVal = theNdb->getDictionary()->createTable(* m_currentTable);
    delete m_currentTable;
    theSchemaCon->theError.code = theNdb->getDictionary()->getNdbError().code;
  }
  
  return retVal;
}//NdbSchemaOp::sendRec()
/******************************************************************************
int init();
Return Value:  Return 0 : init was successful.
               Return -1: In all other case.  
Remark:        Initiates SchemaOp record after allocation.
******************************************************************************/
int
NdbSchemaOp::init(NdbSchemaCon* aSchemaCon)
{
  theSchemaCon = aSchemaCon;
  return 0;
}//NdbSchemaOp::init()
const NdbError &
NdbSchemaOp::getNdbError() const
{
   return theSchemaCon->getNdbError();
}

						