src/storage/DatabaseManagerImpl.cxx

   1 /***************************************************************************
   2  *   Copyright (C) 2007 by www.databasecache.com                           *
   3  *   Contact: praba_tuty@databasecache.com                                 *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15   ***************************************************************************/
  16 #include<Database.h>
  17 #include<DatabaseManager.h>
  18 #include<DatabaseManagerImpl.h>
  19 #include<os.h>
  20 #include<Table.h>
  21 #include<TableImpl.h>
  22 #include<Transaction.h>
  23 #include<CatalogTables.h>
  24 #include<Index.h>
  25 #include<Lock.h>
  26 #include<Debug.h>
  27 #include<Config.h>
  28 #include<TableConfig.h>
  29 #include<Process.h>
  30
  31
  32 DatabaseManagerImpl::~DatabaseManagerImpl()
  33 {
  34     //Note:Databases are closed by the session interface
  35     delete tMgr_;
  36     delete lMgr_;
  37 }
  38
  39 void DatabaseManagerImpl::createLockManager()
  40 {
  41     lMgr_ = new LockManager(systemDatabase_);
  42     return;
  43 }
  44
  45 void DatabaseManagerImpl::createTransactionManager()
  46 {
  47
  48     tMgr_ = new TransactionManager();
  49     tMgr_->setFirstTrans(systemDatabase_->getSystemDatabaseTrans(0));
  50     return;
  51 }
  52 void DatabaseManagerImpl::setProcSlot()
  53 {
  54     systemDatabase_->setProcSlot(procSlot);
  55     db_->setProcSlot(procSlot);
  56 }
  57 DbRetVal DatabaseManagerImpl::openSystemDatabase()
  58 {
  59     DbRetVal rv = openDatabase(SYSTEMDB);
  60     if (rv != OK) return rv;
  61     systemDatabase_ = db_;
  62     db_ = NULL;
  63     printDebug(DM_Database, "Opened system database");
  64     return OK;
  65 }
  66
  67 DbRetVal DatabaseManagerImpl::closeSystemDatabase()
  68 {
  69     Database *db  = db_;
  70     //make them to point to system database file descriptor
  71     //and database pointer
  72     db_ = systemDatabase_;
  73     closeDatabase();
  74     db_ = db;
  75     printDebug(DM_Database, "Closed system database");
  76     return OK;
  77 }
  78
  79 DbRetVal DatabaseManagerImpl::createDatabase(const char *name, size_t size)
  80 {
  81     bool isMmapNeeded = Conf::config.useMmap();
  82 /*
  83     if (isMmapNeeded && !Conf::config.useDurability()) {
  84         printError(ErrBadArg, "If MMAP is set to true. Durability must be true.");
  85         return ErrBadArg;
  86     }
  87 */
  88     file_desc fd = (file_desc)-1;
  89     char cmd[1024];
  90     char dbMapFile[MAX_FILE_LEN];
  91     struct stat st;
  92     long fixAddr = 399998976L;
  93     bool firstTimeServer = false;
  94     if (NULL != db_ )
  95     {
  96         printError(ErrAlready, "Database is already created");
  97         return ErrAlready;
  98     }
  99     caddr_t rtnAddr = (caddr_t) NULL;
 100     void *mapAddr = NULL;
 101     shared_memory_id shm_id = 0;
 102
 103     char *startaddr = (char*)Conf::config.getMapAddress();
 104     shared_memory_key key = 0;
 105     if (0 == strcmp(name, SYSTEMDB))
 106     {
 107
 108         key = Conf::config.getSysDbKey();
 109     }
 110     else
 111     {
 112         startaddr = startaddr + Conf::config.getMaxSysDbSize();
 113         key = Conf::config.getUserDbKey();
 114     }
 115     if (!isMmapNeeded || (isMmapNeeded && 0 == strcmp(name, SYSTEMDB))) {
 116         shm_id = os::shm_create(key, size, 0660);
 117         if (-1 == shm_id) {
 118             if (errno == EEXIST)
 119 #if (defined MMDB && defined EMBED)
 120                 printError(ErrOS, "One application is already running.");
 121             return ErrOS;
 122 #else
 123                 printError(ErrOS, "Shared Memory already exists");
 124 #endif
 125             printError(ErrOS, "Shared memory create failed");
 126             exit(0);
 127         }
 128     } else {
 129         //switch the checkpoint
 130         if (Database::getCheckpointID() == 0)
 131             Database::setCheckpointID(1);
 132         else
 133             Database::setCheckpointID(0);
 134         int chkptID=Database::getCheckpointID();
 135
 136
 137         sprintf(dbMapFile, "%s/db.chkpt.data%d", Conf::config.getDbFile(), chkptID);
 138         /*if (FILE *file = fopen(dbMapFile, "r")) {
 139             fclose(file);
 140             sprintf(cmd, "cp %s %s/db.chkpt.data", dbMapFile, Conf::config.getDbFile());
 141             int ret = system(cmd);
 142             if (ret != 0) {
 143                 printError(ErrOS, "could not copy data file to map file");
 144                 return ErrOS;
 145             }
 146         }
 147         sprintf(dbMapFile, "%s/db.chkpt.data", Conf::config.getDbFile());
 148         */
 149
 150
 151         fd = os::openFile(dbMapFile, fileOpenCreat, 0660);
 152         if ((file_desc) -1 == fd) {
 153             printError(ErrOS, "Mmap file could not be opened");
 154             return ErrOS;
 155         }
 156         if(::stat(dbMapFile, &st) == -1) {
 157             printf("Unable to retrieve the db File data\n");
 158             os::closeFile(fd);
 159             db_->setChkptfd((file_desc)-1);
 160             return ErrOS;
 161         }
 162 #ifdef WINNT
 163         int localfd = os::open(dbMapFile, fileOpenCreat,0);
 164 #else
 165                 int localfd = fd;
 166 #endif
 167                 if (st.st_size == 0 || st.st_size < size) {
 168             firstTimeServer = true;
 169             off_t flSize = os::lseek(localfd, size - 1, SEEK_SET);
 170         }
 171         char *a = "0";
 172         int wSize = os::write(localfd, a, 1);
 173 #ifdef WINNT
 174             os::close(localfd);
 175 #endif
 176         mapAddr = os::mmap((void *)(fixAddr + Conf::config.getMaxSysDbSize()), size,
 177                                 mapProtRead | mapProtWrite, mapFixed | mapShared, fd, 0);
 178         rtnAddr = (caddr_t) mapAddr;
 179         printDebug(DM_Database, "Mapped db file address = %x", mapAddr);
 180     }
 181     void *shm_ptr = NULL;
 182     if (!isMmapNeeded || isMmapNeeded && 0 == strcmp(name, SYSTEMDB)) {
 183         shm_ptr = os::shm_attach(shm_id, startaddr, SHM_RND);
 184         rtnAddr  = (caddr_t) shm_ptr;
 185         if (rtnAddr < 0 || shm_ptr == (char*)0xffffffff)
 186         {
 187             printError(ErrOS, "Shared memory attach returned -ve value %d", rtnAddr);
 188             return ErrOS;
 189         }
 190 # if (defined MMDB && defined EMBED)
 191         if (0 == strcmp(name, SYSTEMDB)) ProcessManager::sysAddr = rtnAddr;
 192         else ProcessManager::usrAddr = rtnAddr;
 193 # endif
 194     }
 195     db_ = new Database();
 196     printDebug(DM_Database, "Creating database:%s",name);
 197
 198     /*if (!isMmapNeeded || isMmapNeeded && 0 == strcmp(name, SYSTEMDB)) {
 199         memset(shm_ptr, 0, size );
 200     }*/
 201
 202     //TODO:for user database do not have transtable and processtable mutex
 203     db_->setMetaDataPtr((DatabaseMetaData*)rtnAddr);
 204     db_->setDatabaseID(1);
 205     db_->setName(name);
 206     db_->setMaxSize(size);
 207     db_->setNoOfChunks(0);
 208     db_->initAllocDatabaseMutex();
 209     db_->initTransTableMutex();
 210     db_->initCheckpointMutex();
 211     db_->initProcessTableMutex();
 212     db_->initPrepareStmtMutex();
 213     db_->setUniqueChunkID(100);
 214     //compute the first page after book keeping information
 215     size_t offset = os::alignLong(sizeof (DatabaseMetaData));
 216     //Only for system db chunk array, trans array and proc array will be there
 217     if (0 == strcmp(name, SYSTEMDB))
 218     {
 219         db_->setCanTakeCheckPoint(true);
 220         offset = offset + os::alignLong( MAX_CHUNKS  * sizeof (Chunk));
 221         offset = offset + os::alignLong( Conf::config.getMaxProcs()   * sizeof(Transaction));
 222         offset = offset + os::alignLong( Conf::config.getMaxProcs() * sizeof(ThreadInfo));
 223     }
 224     int multiple = os::floor(offset / PAGE_SIZE);
 225     char *curPage = (((char*)rtnAddr) + ((multiple + 1) * PAGE_SIZE));
 226
 227     db_->setCurrentPage(curPage);
 228     db_->setFirstPage(curPage);
 229
 230     if (0 == strcmp(name, SYSTEMDB)) return OK;
 231
 232     /*Allocate new chunk to store hash index nodes
 233     Chunk *chunkInfo = createUserChunk(sizeof(IndexNode));
 234     if (NULL == chunkInfo)
 235     {
 236         printError(ErrSysInternal, "Failed to allocate hash index nodes chunk");
 237         return ErrSysInternal;
 238     }
 239     printDebug(DM_Database, "Creating Chunk for storing Hash index nodes %x",
 240                                                                   chunkInfo);
 241
 242     db_->setHashIndexChunk(chunkInfo);*/
 243     return OK;
 244 }
 245
 246 DbRetVal DatabaseManagerImpl::deleteDatabase(const char *name)
 247 {
 248     shared_memory_id shm_id = 0;
 249     if (0 == strcmp(name, SYSTEMDB))
 250     {
 251         shm_id = os::shm_open(Conf::config.getSysDbKey(), 100, 0660);
 252         os::shm_remove(shm_id);
 253                 delete systemDatabase_;
 254                 systemDatabase_ = NULL;
 255     } else {
 256         shm_id = os::shm_open(Conf::config.getUserDbKey(), 100, 0660);
 257         os::shm_remove(shm_id);
 258                 delete db_;
 259                 db_ = NULL;
 260     }
 261     return OK;
 262 }
 263
 264 DbRetVal DatabaseManagerImpl::openDatabase(const char *name)
 265 {
 266     bool isMmapNeeded = Conf::config.useMmap();
 267     char dbMapFile[1024];
 268     file_desc fd = (file_desc)-1;
 269     long size = Conf::config.getMaxSysDbSize();
 270     char *startaddr = (char*)Conf::config.getMapAddress();
 271     long fixAddr = 399998976L;
 272     if (0 == strcmp(name , SYSTEMDB))
 273     {
 274         if (NULL !=systemDatabase_)
 275         {
 276             printError(ErrAlready, "System Database already open");
 277             return ErrAlready;
 278         }
 279     }
 280     else
 281     {
 282         if (NULL ==systemDatabase_)
 283         {
 284             printError(ErrNotOpen, "System Database not open");
 285             return ErrNotOpen;
 286         }
 287         size = Conf::config.getMaxDbSize();
 288         startaddr = startaddr +  Conf::config.getMaxSysDbSize();
 289         fixAddr += Conf::config.getMaxSysDbSize();
 290     }
 291     if (NULL != db_)
 292     {
 293         printError(ErrAlready, "User Database already open");
 294         return ErrAlready;
 295     }
 296     //system db should be opened before user database files
 297     caddr_t rtnAddr = (caddr_t) NULL;
 298
 299     shared_memory_id shm_id = 0;
 300     shared_memory_key key = 0;
 301
 302     if (0 == strcmp(name, SYSTEMDB))
 303         key = Conf::config.getSysDbKey();
 304     else
 305        key = Conf::config.getUserDbKey();
 306
 307
 308     void *shm_ptr = NULL;
 309     void *mapAddr = NULL;
 310     bool firstThread = false;
 311     if ( ( ProcessManager::noThreads == 0 && 0 == strcmp(name, SYSTEMDB) ||
 312           ProcessManager::noThreads == 1 && 0 != strcmp(name, SYSTEMDB) ) )
 313    {
 314         if(isMmapNeeded && 0 != strcmp(name, SYSTEMDB)){
 315             //: Attach to Map File
 316             int curChkptID = Database::getCheckpointID();
 317             sprintf(dbMapFile, "%s/db.chkpt.data%d", Conf::config.getDbFile(),
 318                                                      curChkptID);
 319             fd = os::openFile(dbMapFile, fileOpenReadWrite, 0660);
 320             if ((file_desc)-1 == fd) {
 321                 printError(ErrOS, "Mmap file could not be opened");
 322                 return ErrOS;
 323             }
 324             mapAddr = os::mmap((void *)fixAddr, size, mapProtRead | mapProtWrite,
 325                                 mapFixed | mapShared, fd, 0);
 326
 327             shm_ptr= (caddr_t) mapAddr;
 328             printDebug(DM_Database, "Mapped db file address = %x", mapAddr);
 329         }else
 330         {
 331             shm_id = os::shm_open(key, size, 0660);
 332             if (shm_id == -1 )
 333             {
 334                 printError(ErrOS, "Shared memory open failed");
 335                 return ErrOS;
 336             }
 337             shm_ptr = os::shm_attach(shm_id, startaddr, SHM_RND);
 338         }
 339         if (0 == strcmp(name, SYSTEMDB))
 340         {
 341             firstThread = true;
 342             ProcessManager::sysAddr = (char*) shm_ptr;
 343         }
 344         else
 345         {
 346             ProcessManager::usrAddr = (char*) shm_ptr;
 347         }
 348     } else {
 349         if (0 == strcmp(name, SYSTEMDB)) shm_ptr = ProcessManager::sysAddr;
 350         else shm_ptr = ProcessManager::usrAddr;
 351     }
 352
 353
 354         rtnAddr  = (caddr_t) shm_ptr;
 355 #if defined (x86_64)
 356     if (rtnAddr < 0 || shm_ptr == (char*)0xffffffffffffffff)
 357     {
 358         printError(ErrOS, "Shared memory attach returned -ve value %x %d", shm_ptr, errno);
 359         return ErrOS;
 360     }
 361 #else
 362     if (rtnAddr < 0 || shm_ptr == (char*)0xffffffff)
 363     {
 364         printError(ErrOS, "Shared memory attach returned -ve value %x %d", shm_ptr, errno);
 365         return ErrOS;
 366     }
 367 #endif
 368
 369     db_ = new Database();
 370     db_->setMetaDataPtr((DatabaseMetaData*)rtnAddr);
 371     db_->setChkptfd(fd);
 372
 373     if (firstThread) ProcessManager::systemDatabase = db_;
 374
 375     printDebug(DM_Database, "Opening database: %s", name);
 376     return OK;
 377 }
 378
 379 DbRetVal DatabaseManagerImpl::closeDatabase()
 380 {
 381
 382     if (NULL == db_)
 383     {
 384         //Database is already closed
 385         return OK;
 386     }
 387     printDebug(DM_Database, "Closing database: %s",(char*)db_->getName());
 388     //check if this is the last thread to be deregistered
 389     int ret =0;// ProcessManager::mutex.getLock(-1, false);
 390     //If you are not getting lock ret !=0, it means somebody else is there.
 391     //he will close the database.
 392     if (0 != strcmp((char*)db_->getName(),  SYSTEMDB)) {
 393         file_desc fd = db_->getChkptfd();
 394         os::closeFile(fd);
 395     }
 396     if (ret == 0) {
 397     if (ProcessManager::noThreads == 0 && 0 == strcmp((char*)db_->getName(), SYSTEMDB)
 398        || ProcessManager::noThreads == 1 && 0 != strcmp((char*)db_->getName(),  SYSTEMDB) )  {
 399                 os::shm_detach((char*)db_->getMetaDataPtr());
 400             }
 401     }
 402     // ProcessManager::mutex.releaseLock(-1, false);
 403     delete db_;
 404     db_ = NULL;
 405     return OK;
 406 }
 407 //Assumes that system database mutex is taken before calling this.
 408 Chunk* DatabaseManagerImpl::createUserChunk(size_t size)
 409 {
 410     //Allocate new node in system database to store
 411     Chunk *chunk = getSystemTableChunk(UserChunkTableId);
 412     DbRetVal rv = OK;
 413     void *ptr = chunk->allocate(systemDatabase_, &rv);
 414     if (NULL == ptr)
 415     {
 416          printError(rv, "Allocation failed for User chunk catalog table");
 417          return NULL;
 418     }
 419     Chunk *chunkInfo = (Chunk*)ptr;
 420     int id = db_->getUniqueIDForChunk();
 421     db_->incrementChunk();
 422     chunkInfo->initMutex(id);
 423     if (0 != size) chunkInfo->setSize(size);
 424     if (chunkInfo->allocSize_ > PAGE_SIZE)
 425         chunkInfo->curPage_ = db_->getFreePage(chunkInfo->allocSize_);
 426     else
 427         chunkInfo->curPage_ = db_->getFreePage();
 428     if ( NULL == chunkInfo->curPage_)
 429     {
 430         chunkInfo->destroyMutex();
 431         chunk->free(db_, ptr);
 432         printError(ErrNoMemory, "Database full: No space to allocate from database");
 433         return NULL;
 434     }
 435     PageInfo* firstPageInfo = ((PageInfo*)chunkInfo->curPage_);
 436     if (chunkInfo->allocSize_ > PAGE_SIZE)
 437     {
 438         int multiple = os::floor(chunkInfo->allocSize_ / PAGE_SIZE);
 439         int offset = ((multiple + 1) * PAGE_SIZE);
 440         firstPageInfo->setPageAsUsed(offset);
 441     }
 442     else
 443     {
 444         firstPageInfo->setPageAsUsed(chunkInfo->allocSize_);
 445         char *data = ((char*)firstPageInfo) + sizeof(PageInfo);
 446         *(InUse*)data =0;
 447     }
 448     if (0 == size)
 449     {
 450         VarSizeInfo *varInfo = (VarSizeInfo*)(((char*)firstPageInfo) + sizeof(PageInfo));
 451         varInfo->isUsed_ = 0;
 452         varInfo->size_ = PAGE_SIZE - sizeof(PageInfo) - sizeof(VarSizeInfo);
 453
 454     }
 455     chunkInfo->firstPage_ = chunkInfo->curPage_;
 456
 457     if (0 == size)
 458         chunkInfo->setAllocType(VariableSizeAllocator);
 459     else
 460         chunkInfo->setAllocType(FixedSizeAllocator);
 461
 462     chunkInfo->setChunkID(id);
 463     chunkInfo->setPageDirty(firstPageInfo);
 464     printDebug(DM_Database, "Creating new User chunk chunkID:%d size: %d firstPage:%x",
 465                                -1, chunkInfo->allocSize_, firstPageInfo);
 466
 467     return chunkInfo;
 468 }
 469
 470 //Assumes that system database mutex is taken before calling this.
 471 DbRetVal DatabaseManagerImpl::deleteUserChunk(Chunk *chunk)
 472 {
 473     //Go to the pages and set them to notUsed
 474     Page *page = chunk->firstPage_;
 475     PageInfo* pageInfo = ((PageInfo*)page);
 476     //Here...sure that atleast one page will be there even no tuples
 477     //are inserted.so not checking if pageInfo == NULL
 478     while( pageInfo->nextPage_ != NULL)
 479     {
 480         PageInfo *prev = pageInfo;
 481         pageInfo = (PageInfo*)(pageInfo->nextPage_);
 482         //sets pageInfo->isUsed_ = 0 and pageInfo->hasFreeSpace_ = 0
 483         //and initializes the page content to zero
 484         if(NULL == pageInfo->nextPageAfterMerge_){
 485             os::memset(prev, 0, PAGE_SIZE);
 486             SETBIT(prev->flags, IS_DIRTY);
 487
 488         }
 489         else
 490         {
 491             int size = (char*) pageInfo->nextPageAfterMerge_ - (char*) pageInfo;
 492             char *iter = (char*)prev, *end=(char*)pageInfo->nextPageAfterMerge_;
 493             os::memset(prev, 0, size);
 494             //set dirty bit for all pages in merged pages
 495             while(iter <= end)
 496             {
 497                 PageInfo *info = (PageInfo*) iter;
 498                 SETBIT(info->flags, IS_DIRTY);
 499                 iter = iter  + PAGE_SIZE;
 500             }
 501         }
 502         printDebug(DM_Database,"deleting user chunk:%x clearing page %x",chunk, prev);
 503     }
 504     //The above loop wont execute for the last page
 505     //and for the case where table has only one page
 506     if(NULL == pageInfo->nextPageAfterMerge_) {
 507         os::memset(pageInfo, 0, PAGE_SIZE);
 508         SETBIT(pageInfo->flags, IS_DIRTY);
 509     }
 510     else
 511     {
 512         int size = (char*) pageInfo->nextPageAfterMerge_ - (char*) pageInfo;
 513         char *iter = (char*)pageInfo, *end=(char*)pageInfo->nextPageAfterMerge_;
 514         os::memset(pageInfo, 0, size);
 515         //set dirty bit for all pages in merged pages
 516         while(iter <= end)
 517         {
 518             PageInfo *info = (PageInfo*) iter;
 519             SETBIT(info->flags, IS_DIRTY);
 520             iter = iter  + PAGE_SIZE;
 521         }
 522     }
 523     printDebug(DM_Database,"deleting user chunk:%x clearing page %x",chunk, pageInfo);
 524     chunk->chunkID_ = -1;
 525     chunk->allocSize_ = 0;
 526     chunk->curPage_ = NULL;
 527     chunk->firstPage_ = NULL;
 528     chunk->destroyMutex();
 529     db_->decrementChunk();
 530     Chunk *userChunk = getSystemTableChunk(UserChunkTableId);
 531     userChunk->free(systemDatabase_,chunk);
 532     printDebug(DM_Database,"deleting user chunk:%x",chunk);
 533     return OK;
 534 }
 535
 536 //-1 -> Unable to create chunk. No memory
 537 //-2 -> Unable to update the catalog tables
 538 DbRetVal DatabaseManagerImpl::createTable(const char *name, TableDef &def)
 539 {
 540     DbRetVal rv = OK;
 541     if (!Util::isIdentifier((char*)name)) {
 542         printError(ErrBadArg, "Invalid character for index name");
 543         return ErrBadArg;
 544     }
 545     int fldCount = def.getFieldCount();
 546     if(0==fldCount)
 547     {
 548         printError(ErrNotExists,"Table can't be created without Field");
 549         return ErrNotExists;
 550     }
 551
 552     //If total field count is within 32, then 1 integer is used to store all
 553     // null information, if it is more then 1 char is used to store null
 554     // information of each field
 555     //This is to done to reduce cpu cycles for small tables
 556     int addSize = 0;
 557     if (fldCount <= 32) addSize = 4; else addSize = os::align(fldCount);
 558     size_t sizeofTuple = os::alignLong(def.getTupleSize()+addSize);
 559     rv = systemDatabase_->getXCheckpointMutex();
 560     if (OK != rv ) {
 561         printError(rv, "Unable to get Database mutex");
 562         return rv;
 563     }
 564
 565     void *tptr =NULL;
 566     void *chunk = NULL;
 567     void *vcchunk = NULL;
 568
 569     //check whether table already exists
 570     CatalogTableTABLE cTable(systemDatabase_);
 571     cTable.getChunkAndTblPtr(name, chunk, tptr, vcchunk);
 572     if (NULL != tptr)
 573     {
 574         systemDatabase_->releaseCheckpointMutex();
 575         printError(ErrAlready, "Table %s already exists", name);
 576         return ErrAlready;
 577     }
 578
 579     //create a chunk to store the tuples
 580     Chunk *ptr = createUserChunk(sizeofTuple);
 581     if (NULL  == ptr)
 582     {
 583         systemDatabase_->releaseCheckpointMutex();
 584         printError(ErrNoResource, "Unable to create user chunk");
 585         return ErrNoResource;
 586     }
 587     printDebug(DM_Database,"Created UserChunk:%x", ptr);
 588     ptr->setChunkName(name);
 589     //add row to TABLE
 590     int tblID = ((Chunk*)ptr)->getChunkID();
 591
 592     //check whether varchar is present in table
 593     FieldIterator fiter = def.getFieldIterator();
 594     bool isVarcharPresent = def.isVarcharPresentInSchema(fiter);
 595     Chunk *vcptr = NULL;
 596     if (isVarcharPresent) {
 597         //creat chunk to store varchar values
 598         vcptr = createUserChunk();
 599         if (NULL  == vcptr)
 600         {
 601             deleteUserChunk(ptr);
 602             systemDatabase_->releaseCheckpointMutex();
 603             printError(ErrNoResource, "Unable to create user chunk for varchar");
 604             return ErrNoResource;
 605         }
 606         printDebug(DM_Database,"Created UserChunk for Varchar:%x", vcptr);
 607         vcptr->setChunkName(name);
 608     }
 609     rv = cTable.insert(name, tblID, sizeofTuple,
 610                                    def.getFieldCount(), ptr, tptr, vcptr);
 611     if (OK != rv)
 612     {
 613         deleteUserChunk(ptr);
 614         if (vcptr) deleteUserChunk(vcptr);
 615         systemDatabase_->releaseCheckpointMutex();
 616         printError(ErrSysInternal, "Unable to update catalog table TABLE");
 617         return ErrSysInternal;
 618     }
 619     printDebug(DM_Database,"Inserted into TABLE:%s",name);
 620     //add rows to FIELD
 621     FieldIterator iter = def.getFieldIterator();
 622     CatalogTableFIELD cField(systemDatabase_);
 623     rv = cField.insert(iter, tblID ,tptr);
 624     if (OK != rv)
 625     {
 626         deleteUserChunk(ptr);
 627         if (vcptr) deleteUserChunk(vcptr);
 628         void *cptr, *ttptr;//Dummy as remove below needs both these OUT params
 629         cTable.remove(name, cptr, ttptr);
 630         systemDatabase_->releaseCheckpointMutex();
 631         printError(ErrSysInternal, "Unable to update catalog table FIELD");
 632         return ErrSysInternal;
 633     }
 634     printDebug(DM_Database,"Inserted into FIELD:%s",name);
 635     systemDatabase_->releaseCheckpointMutex();
 636     printDebug(DM_Database,"Table Created:%s",name);
 637     logFinest(Conf::logger, "Table Created %s" , name);
 638     return OK;
 639 }
 640 DbRetVal DatabaseManagerImpl::renameTable(const char *oldName,const char *newName)
 641 {
 642     void *chunk = NULL;
 643     DbRetVal rv = systemDatabase_->getXCheckpointMutex();
 644     if (OK != rv) {
 645         printError(ErrSysInternal, "Unable to get database mutex for rename table");
 646         return ErrSysInternal;
 647     }
 648     CatalogTableTABLE cTable(systemDatabase_);
 649     rv = cTable.renameTable(oldName,newName);
 650     if (OK != rv) {
 651         printError(ErrSysInternal, "Unable to rename table");
 652         systemDatabase_->releaseCheckpointMutex();
 653         return ErrSysInternal;
 654     }
 655     systemDatabase_->releaseCheckpointMutex();
 656     return OK;
 657 }
 658 DbRetVal DatabaseManagerImpl::renameIndex(const char *oldName,const char *newName)
 659 {
 660     void *chunk = NULL;
 661     DbRetVal rv = systemDatabase_->getXCheckpointMutex();
 662     if (OK != rv) {
 663         printError(ErrSysInternal, "Unable to get database mutex for rename table");
 664         return ErrSysInternal;
 665     }
 666     CatalogTableTABLE cTable(systemDatabase_);
 667     rv = cTable.renameIndex(oldName,newName);
 668     if (OK != rv) {
 669         printError(ErrSysInternal, "Unable to rename table");
 670         systemDatabase_->releaseCheckpointMutex();
 671         return ErrSysInternal;
 672     }
 673     systemDatabase_->releaseCheckpointMutex();
 674     return OK;
 675 }
 676
 677 DbRetVal DatabaseManagerImpl::renameField(const char *tableName,const char *oldName,const char *newName)
 678 {
 679    DbRetVal rv = systemDatabase_->getXCheckpointMutex();
 680     if (OK != rv) {
 681         printError(ErrSysInternal, "Unable to get database mutex for rename table");
 682         return ErrSysInternal;
 683     }
 684     CatalogTableFIELD fTable(systemDatabase_);
 685     rv = fTable.renameField(tableName, oldName, newName);
 686     if (OK != rv) {
 687         printError(ErrSysInternal, "Unable to rename field.");
 688         systemDatabase_->releaseCheckpointMutex();
 689         return ErrSysInternal;
 690     }
 691     systemDatabase_->releaseCheckpointMutex();
 692     return rv;
 693 }
 694
 695 //TODO::If any operation fails in between, then we may have some
 696 //dangling tuples, say we have have rows in INDEX table
 697 //which will not have any corresponding entries in TABLE
 698 //CHANGE the sequence so that it deletes from the bottom as
 699 //opposed to start from top as is written now
 700 DbRetVal DatabaseManagerImpl::dropTable(const char *name)
 701 {
 702     void *chunk = NULL;
 703     void *tptr =NULL;
 704     void *vcchunk = NULL;
 705     DbRetVal rv = systemDatabase_->getXCheckpointMutex();
 706     if (OK != rv) {
 707         printError(ErrSysInternal, "Unable to get database mutex");
 708         return ErrSysInternal;
 709     }
 710     //remove the entry in TABLE
 711     CatalogTableTABLE cTable(systemDatabase_);
 712     rv = cTable.getChunkAndTblPtr(name, chunk, tptr, vcchunk);
 713     if (OK != rv) {
 714         systemDatabase_->releaseCheckpointMutex();
 715         printError(ErrSysInternal, "Table %s does not exist", name);
 716         return ErrSysInternal;
 717     }
 718     CatalogTableFK cFK(systemDatabase_);
 719     int noOfRelation =cFK.getNumFkTable(tptr);
 720     if(noOfRelation)
 721     {
 722         printError(ErrSysInternal, "Unable to drop table due to relation exist.Drop child table...");
 723         systemDatabase_->releaseCheckpointMutex();
 724         return ErrSysInternal;
 725     }
 726     Transaction **trans = ProcessManager::getThreadTransAddr(systemDatabase_->procSlot);
 727     rv = lMgr_->getExclusiveLock(chunk, trans);
 728     if (rv !=OK)
 729     {
 730         systemDatabase_->releaseCheckpointMutex();
 731         printError(ErrLockTimeOut, "Unable to acquire exclusive lock on the table\n");
 732         return rv;
 733     }
 734
 735     rv = cTable.remove(name, chunk, tptr);
 736     if (OK != rv) {
 737         systemDatabase_->releaseCheckpointMutex();
 738         printError(ErrSysInternal, "Unable to update catalog table TABLE");
 739         return ErrSysInternal;
 740     }
 741     printDebug(DM_Database,"Deleted from TABLE:%s",name);
 742
 743     //remove the entries in the FIELD table
 744     CatalogTableFIELD cField(systemDatabase_);
 745     rv = cField.remove(tptr);
 746     if (OK != rv) {
 747         systemDatabase_->releaseCheckpointMutex();
 748         printError(ErrSysInternal, "Unable to update catalog table FIELD");
 749         return ErrSysInternal;
 750     }
 751     printDebug(DM_Database,"Deleted from FIELD:%s",name);
 752
 753     rv = deleteUserChunk((Chunk*)chunk);
 754     if (OK != rv) {
 755         systemDatabase_->releaseCheckpointMutex();
 756         printError(rv, "Unable to delete the chunk");
 757         return rv;
 758     }
 759     printDebug(DM_Database,"Deleted UserChunk:%x", chunk);
 760
 761     if (vcchunk != NULL) {
 762         rv = deleteUserChunk((Chunk*)vcchunk);
 763         if (OK != rv) {
 764             systemDatabase_->releaseCheckpointMutex();
 765             printError(rv, "Unable to delete the chunk");
 766             return rv;
 767         }
 768         printDebug(DM_Database,"Deleted UserChunk for Varchar:%x", chunk);
 769     }
 770
 771     //TODO::check whether indexes are available and drop that also.
 772     CatalogTableINDEX cIndex(systemDatabase_);
 773     int noIndexes = cIndex.getNumIndexes(tptr);
 774     for (int i =1 ; i<= noIndexes; i++) {
 775         char *idxName = cIndex.getIndexName(tptr, 1);
 776         dropIndexInt(idxName, false);
 777     }
 778     bool isFkExist=cFK.isFkTable(tptr);
 779     if(isFkExist)
 780     {
 781        dropForeignKey(tptr,false);
 782     }
 783     systemDatabase_->releaseCheckpointMutex();
 784     printDebug(DM_Database, "Deleted Table %s" , name);
 785     logFinest(Conf::logger, "Deleted Table %s" , name);
 786     rv = lMgr_->releaseLock(chunk);
 787     if (rv !=OK)
 788     {
 789         printError(ErrLockTimeOut, "Unable to release exclusive lock on the table\n");
 790         return rv;
 791     }
 792     return OK;
 793 }
 794
 795 //Return values: NULL for table not found
 796 Table* DatabaseManagerImpl::openTable(const char *name,bool checkpkfk)
 797 {
 798     DbRetVal ret = OK;
 799     //TODO::store table handles in list so that if it is
 800     //not closed by the application. destructor shall close it.
 801     TableImpl *table = new TableImpl();
 802     table->setDB(db_);
 803     table->setSystemDB(systemDatabase_);
 804     table->setLockManager(lMgr_);
 805     table->setTrans(ProcessManager::getThreadTransAddr(systemDatabase_->procSlot));
 806
 807     //to store the chunk pointer of table
 808     void *chunk = NULL;
 809     void *vcchunk = NULL;
 810
 811     //to store the tuple pointer of the table
 812     void *tptr =NULL;
 813
 814     //TODO::need to take shared lock on the table so that
 815     //all ddl operation will be denied on that table
 816     //which includes index creation, alter table
 817
 818     DbRetVal rv = systemDatabase_->getAllocDatabaseMutex();
 819     if (OK != rv) {
 820         printError(ErrSysInternal, "Unable to get database mutex");
 821         delete table;
 822         return NULL;
 823     }
 824     CatalogTableTABLE cTable(systemDatabase_);
 825     ret = cTable.getChunkAndTblPtr(name, chunk, tptr, vcchunk);
 826     if ( OK != ret)
 827     {
 828         systemDatabase_->releaseAllocDatabaseMutex();
 829         delete table;
 830         printError(ErrNotExists, "Table not exists %s", name);
 831         return NULL;
 832     }
 833     CTABLE *tTuple = (CTABLE*)tptr;
 834     table->setTableInfo(tTuple->tblName_, tTuple->tblID_, tTuple->length_,
 835                         tTuple->numFlds_, tTuple->numIndexes_,
 836                         tTuple->chunkPtr_, tTuple->varcharChunkPtr_);
 837     /*rv = table->lock(true); //take shared lock
 838     if (rv !=OK)
 839     {
 840         printError(ErrLockTimeOut, "Unable to acquire shared lock on the table\n");
 841         systemDatabase_->releaseAllocDatabaseMutex();
 842         delete table;
 843         return NULL;
 844     }*/
 845
 846
 847     if (tTuple->numFlds_ <= 32)
 848     {
 849         table->isIntUsedForNULL = true;
 850         table->iNullInfo = 0;
 851         table->iNotNullInfo =0;
 852     }
 853     else
 854     {
 855         table->isIntUsedForNULL = false;
 856         int noFields = os::align(tTuple->numFlds_);
 857         table->cNullInfo = (char*) malloc(noFields);
 858         table->cNotNullInfo = (char*) malloc(noFields);
 859         for (int i =0 ; i < noFields; i++) table->cNullInfo[i] =0;
 860         for (int i =0 ; i < noFields; i++) table->cNotNullInfo[i] =0;
 861
 862     }
 863
 864     //get field information from FIELD table
 865     CatalogTableFIELD cField(systemDatabase_);
 866     table->ptrToAuto = cField.getFieldInfo(tptr, table->fldList_);
 867
 868     //populate the notnull info
 869     FieldIterator fIter = table->fldList_.getIterator();
 870     int fldpos=1;
 871     while (fIter.hasElement())
 872     {
 873         FieldDef *def = fIter.nextElement();
 874         if (table->isIntUsedForNULL) {
 875             if (def->isNull_) SETBIT(table->iNotNullInfo, fldpos-1);
 876         }
 877         else {
 878             if (def->isNull_) table->cNotNullInfo[fldpos-1] = 1;
 879         }
 880         fldpos++;
 881    }
 882
 883     //get the number of indexes on this table
 884     //and populate the indexPtr array
 885     CatalogTableINDEX cIndex(systemDatabase_);
 886     table->numIndexes_ = cIndex.getNumIndexes(tptr);
 887     if (table->numIndexes_) {
 888         table->indexPtr_ = new char*[table->numIndexes_];
 889         table->idxInfo = new IndexInfo*[table->numIndexes_];
 890     }
 891     else
 892     {
 893         table->indexPtr_ = NULL;
 894     }
 895     cIndex.getIndexPtrs(tptr, table->indexPtr_);
 896     for (int i =0 ; i < table->numIndexes_; i++ )
 897     {
 898         HashIndexInfo *hIdxInfo = new HashIndexInfo();
 899         CatalogTableINDEXFIELD cIndexField(systemDatabase_);
 900         cIndexField.getFieldInfo(table->indexPtr_[i], hIdxInfo->idxFldList);
 901         ChunkIterator citer = CatalogTableINDEX::getIterator(table->indexPtr_[i]);
 902         hIdxInfo->indexPtr = table->indexPtr_[i];
 903         hIdxInfo->indType = ((CINDEX*)hIdxInfo->indexPtr)->indexType_;
 904         hIdxInfo->noOfBuckets = CatalogTableINDEX::getNoOfBuckets(table->indexPtr_[i]);
 905         FieldIterator fIter = hIdxInfo->idxFldList.getIterator();
 906         bool firstFld = true;
 907         while (fIter.hasElement())
 908         {
 909             FieldDef *def = fIter.nextElement();
 910             if (firstFld)
 911             {
 912                 hIdxInfo->fldOffset = table->fldList_.getFieldOffset(def->fldName_);
 913                 hIdxInfo->type = table->fldList_.getFieldType(def->fldName_);
 914                 hIdxInfo->compLength = table->fldList_.getFieldLength(def->fldName_);
 915                 firstFld = false;
 916             }else {
 917                 hIdxInfo->type = typeComposite;
 918                 hIdxInfo->compLength = hIdxInfo->compLength +
 919                          table->fldList_.getFieldLength(def->fldName_);
 920             }
 921         }
 922
 923         hIdxInfo->isUnique = CatalogTableINDEX::getUnique(table->indexPtr_[i]);
 924         hIdxInfo->buckets = (Bucket*)citer.nextElement();
 925         table->idxInfo[i] = (IndexInfo*) hIdxInfo;
 926     }
 927     systemDatabase_->releaseAllocDatabaseMutex();
 928     //Foreign key Operation
 929     if(checkpkfk){
 930         CatalogTableFK cFk(systemDatabase_);
 931         int totalFld=0;
 932         table->numFkRelation_ = cFk.getNumFkTable(tptr);
 933         if (table->numFkRelation_) {
 934             table->isPkTbl=true;//TODO:for Delete In casecade
 935             totalFld=cFk.getNoOfFkTable(tptr);
 936             //printDebug(DM_TEST,"Total table is %d\n",totalFld);
 937             char **fptr = new char* [totalFld];
 938             cFk.getFkTableName(tptr,fptr);
 939             for(int count=0; count < totalFld; count++){
 940                //printDebug(DM_TEST,"FK Name is %s\n",fptr[count]);
 941                Table *pkTable=openTable(fptr[count],false);
 942                if (pkTable) table->tblFkList.append(pkTable);
 943                else {
 944                    printError(ErrSysInternal, "Unable to open foreign key tables");
 945                    delete[] fptr;
 946                    pkTable->close();
 947                    return NULL;
 948                }
 949             }
 950             delete[] fptr;
 951
 952         }
 953         char *tblName = NULL;
 954         table->isFkTbl = cFk.isFkTable(tptr);
 955         if(table->isFkTbl)
 956         {
 957             totalFld=cFk.getNoOfPkTable(tptr);
 958             char **fptr = new char* [totalFld];
 959             cFk.getPkTableName(tptr,fptr);
 960             for(int count=0; count<totalFld; count++){
 961                 //printDebug(DM_TEST,"Parent Name is %s\n",fptr[count]);
 962                 Table *fkTable = openTable(fptr[count],false);
 963                 if (fkTable) table->tblList.append(fkTable);
 964                 else {
 965                    printError(ErrSysInternal, "Unable to open foreign key tables");
 966                    delete[] fptr;
 967                    fkTable->close();
 968                    return NULL;
 969                }
 970             }
 971             delete[] fptr;
 972         }
 973     }
 974     printDebug(DM_Database,"Opening table handle name:%s chunk:%x numIndex:%d",
 975                                          name, chunk, table->numIndexes_);
 976     logFinest(Conf::logger, "Opening Table %s" , name);
 977     return table;
 978 }
 979
 980 List DatabaseManagerImpl::getAllTableNames(int *retval)
 981 {
 982     DbRetVal ret = OK;
 983     //to store the tuple pointer of the table
 984     void *tptr =NULL;
 985
 986     /*DbRetVal rv = systemDatabase_->getSCheckpointMutex();
 987     if (OK != rv) {
 988         printError(ErrSysInternal, "Unable to get checkpoint mutex");
 989         if(retval) *retval = rv;
 990         List tableList;
 991         return tableList;
 992     }*/
 993     CatalogTableTABLE cTable(systemDatabase_);
 994     List tableList = cTable.getTableList();
 995     //systemDatabase_->releaseCheckpointMutex();
 996     return tableList;
 997 }
 998
 999
1000
1001
1002 //Return values: -1 for table not found
1003 void DatabaseManagerImpl::closeTable(Table *table)
1004 {
1005     printDebug(DM_Database,"Closing table handle: %x", table);
1006     if (NULL == table) return;
1007     //table->unlock();
1008  /*   TableImpl *fkTbl =NULL;
1009     ListIterator tblIter = ((TableImpl*)table)->tblList.getIterator();
1010     tblIter.reset();
1011     while (tblIter.hasElement()){
1012         fkTbl = (TableImpl *) tblIter.nextElement();
1013         closeTable(fkTbl);
1014     }
1015     ((TableImpl*)table)->tblList.reset();
1016     tblIter = ((TableImpl*)table)->tblFkList.getIterator();
1017     tblIter.reset();
1018     while (tblIter.hasElement()){
1019         fkTbl = (TableImpl *) tblIter.nextElement();
1020         closeTable(fkTbl);
1021     }
1022     ((TableImpl*)table)->tblFkList.reset();*/
1023     if (table) delete table; table = NULL;
1024     logFinest(Conf::logger, "Closing Table");
1025 }
1026
1027 DbRetVal DatabaseManagerImpl::createIndex(const char *indName, IndexInitInfo *info)
1028 {
1029     DbRetVal rv = OK;
1030     if (!info->isUnique && info->isPrimary)
1031     {
1032         printError(ErrBadCall, "Primary key cannot be non unique\n");
1033         return ErrBadCall;
1034     }
1035     if (!Util::isIdentifier((char*)indName)) {
1036         printError(ErrBadArg, "Invalid character for index name");
1037         return ErrBadArg;
1038     }
1039
1040     if (info->indType == hashIndex)
1041     {
1042         //Assumes info is of type HashIndexInitInfo
1043         HashIndexInitInfo *hInfo = (HashIndexInitInfo*) info;
1044         rv = createHashIndex(indName, info->tableName, info->list, hInfo->bucketSize,
1045                              info->isUnique, info->isPrimary);
1046     }
1047     else if (info->indType == treeIndex)
1048     {
1049         HashIndexInitInfo *hInfo = (HashIndexInitInfo*) info;
1050         rv = createTreeIndex(indName, info->tableName, info->list,
1051                           hInfo->bucketSize, info->isUnique, info->isPrimary);
1052     }
1053     else if (info->indType == trieIndex)
1054     {
1055         HashIndexInitInfo *hInfo = (HashIndexInitInfo*) info;
1056         rv = createTrieIndex(indName, info->tableName, info->list,
1057                           info->isUnique, info->isPrimary);
1058
1059     }else {
1060         printError(ErrBadCall, "Index type not supported\n");
1061         return ErrBadCall;
1062     }
1063     return rv;
1064 }
1065
1066
1067 //-1 -> Table does not exists
1068 //-2 -> Field does not exists
1069 //-3 -> bucketSize is not valid
1070 DbRetVal DatabaseManagerImpl::createHashIndex(const char *indName, const char *tblName,
1071                       FieldNameList &fldList, int bucketSize, bool isUnique, bool isPrimary)
1072 {
1073     //validate the bucket size
1074     if (bucketSize < 100 || bucketSize > 200000)
1075     {
1076         printError(ErrBadRange, "Index Bucket size %d not in range 100-200000",
1077                                  bucketSize);
1078         return ErrBadRange;
1079     }
1080     int totFlds = fldList.size();
1081     if (totFlds == 0)
1082     {
1083         printError(ErrBadCall, "No Field name specified");
1084         return ErrBadCall;
1085     }
1086     void *tptr =NULL;
1087     void *chunk = NULL;
1088     void *vcchunk = NULL;
1089     DbRetVal rv = systemDatabase_->getXCheckpointMutex();
1090     if (OK != rv)
1091     {
1092         printError(ErrSysInternal, "Unable to get database mutex");
1093         return ErrSysInternal;
1094     }
1095
1096     //check whether table exists
1097     CatalogTableTABLE cTable(systemDatabase_);
1098     cTable.getChunkAndTblPtr(tblName, chunk, tptr, vcchunk);
1099     if (NULL == tptr)
1100     {
1101         systemDatabase_->releaseCheckpointMutex();
1102         printError(ErrNotExists, "Table does not exist %s", tblName);
1103         return ErrNotExists;
1104     }
1105
1106     //check whether field exists
1107     char **fptr = new char* [totFlds];
1108     CatalogTableFIELD cField(systemDatabase_);
1109     rv = cField.getFieldPtrs(fldList, tptr, fptr);
1110     if (OK != rv)
1111     {
1112         delete[] fptr;
1113         systemDatabase_->releaseCheckpointMutex();
1114         //TODO::check test cases of dbapi/Index, they give wrong results
1115         //if (rv == ErrBadCall) {
1116         ////    if (isPrimary) printError(ErrBadCall, "Field can have NULL values");
1117         //} else {
1118         //printError(ErrNotExists, "Field does not exist");
1119         //}
1120         //return ErrBadCall;
1121         if (rv != ErrBadCall) {
1122             printError(ErrNotExists, "Field does not exist");
1123             return ErrNotExists;
1124         }
1125     }
1126     for (int i=0; i <totFlds; i++)
1127     {
1128         CFIELD* fInfo = (CFIELD*)fptr[i];
1129         if (fInfo->type_ == typeFloat || fInfo->type_ == typeDouble || fInfo->type_ == typeTimeStamp)
1130         {
1131             printError(ErrBadArg, "HashIndex cannot be created for float or double or timestamp type");
1132             delete[] fptr;
1133             systemDatabase_->releaseCheckpointMutex();
1134             return ErrBadArg;
1135         }
1136         if (!fInfo->isNull_ && isPrimary )
1137         {
1138             printError(ErrBadArg, "Primary Index cannot be created on field without NOTNULL constraint");
1139             delete[] fptr;
1140             systemDatabase_->releaseCheckpointMutex();
1141             return ErrBadArg;
1142         }
1143          if(isPrimary){fInfo->isPrimary_=true;fInfo->isUnique_=true;}
1144          if(isUnique){fInfo->isUnique_=true;}
1145     }
1146     //create chunk to store the meta data of the index created
1147     //for latches and bucket pointers
1148     printDebug(DM_HashIndex, "Creating chunk for storing hash buckets of size %d\n",
1149                              bucketSize * sizeof(Bucket));
1150     Chunk* chunkInfo = createUserChunk(bucketSize * sizeof(Bucket));
1151     if (NULL == chunkInfo)
1152     {
1153         delete[] fptr;
1154         systemDatabase_->releaseCheckpointMutex();
1155         printError(ErrSysInternal, "Unable to create chunk");
1156         return ErrSysInternal;
1157     }
1158     chunkInfo->setChunkName(indName);
1159     //create memory for holding the bucket pointers
1160     void *buckets = chunkInfo->allocate(db_, &rv);
1161     if (NULL == buckets)
1162     {
1163         delete[] fptr;
1164         deleteUserChunk(chunkInfo);
1165         systemDatabase_->releaseCheckpointMutex();
1166         printError(rv, "Unable to allocate memory for bucket");
1167         return rv;
1168     }
1169     Bucket *buck = (Bucket*) buckets;
1170     initHashBuckets(buck, bucketSize);
1171
1172     //create chunk to store the hash index nodes
1173     Chunk* hChunk = createUserChunk(sizeof(IndexNode));
1174     if (NULL == hChunk)
1175     {
1176         delete[] fptr;
1177         deleteUserChunk(chunkInfo);
1178         systemDatabase_->releaseCheckpointMutex();
1179         printError(ErrSysInternal, "Unable to create chunk for storing hash index nodes");
1180         return ErrSysInternal;
1181     }
1182
1183      hChunk->setChunkName(indName);
1184     //add row to INDEX
1185     void *tupleptr = NULL;
1186     CatalogTableINDEX cIndex(systemDatabase_);
1187     rv = cIndex.insert(indName, tptr, fldList.size(), isUnique,
1188                         chunkInfo, bucketSize, hChunk, tupleptr);
1189     if (OK != rv)
1190     {
1191         delete[] fptr;
1192         deleteUserChunk(hChunk);
1193         deleteUserChunk(chunkInfo);
1194         systemDatabase_->releaseCheckpointMutex();
1195         printError(ErrSysInternal, "Catalog table updation failed in INDEX table");
1196         return ErrSysInternal;
1197     }
1198     //add rows to INDEXFIELD
1199     CatalogTableINDEXFIELD cIndexField(systemDatabase_);
1200     rv = cIndexField.insert(fldList, tupleptr, tptr, fptr);
1201
1202     if (OK != rv)
1203     {
1204         delete[] fptr;
1205         cIndex.remove(indName, (void *&)chunkInfo, (void *&)hChunk, (void *&)tupleptr);
1206         deleteUserChunk(hChunk);
1207         deleteUserChunk(chunkInfo);
1208         systemDatabase_->releaseCheckpointMutex();
1209         printError(ErrSysInternal, "Catalog table updation failed in INDEXFIELD table");
1210         return ErrSysInternal;
1211     }
1212     delete[] fptr;
1213     systemDatabase_->releaseCheckpointMutex();
1214
1215     //TODO:: Take table lock
1216
1217     // Following code is written by Kishor Amballi
1218     TableImpl *tbl = (TableImpl *) openTable(tblName);
1219     if (NULL == tbl) {
1220         printError(ErrSysInternal, "Unable to open table %s", tblName);
1221         return ErrSysInternal;
1222     }
1223     if (! tbl->numTuples()) {
1224         printDebug(DM_Database, "Creating Hash Index Name:%s tblname:%s buckets:%x", indName, tblName, buckets);
1225         logFinest(Conf::logger, "Creating HashIndex %s on %s with bucket size %d", indName, tblName, buckets);
1226         closeTable(tbl);
1227         return OK;
1228     }
1229     HashIndexInfo *indxInfo = NULL;
1230     int i = 0;
1231     for (i = 0; i < tbl->numIndexes_; i++) {
1232         if(((HashIndexInfo *)tbl->idxInfo[i])->indexPtr == tupleptr) {
1233             indxInfo = (HashIndexInfo *) tbl->idxInfo[i];
1234             break;
1235         }
1236     }
1237     void *recPtr = NULL;
1238     ChunkIterator chIter = ((Chunk *)chunk)->getIterator();
1239     tbl->setLoading(true);
1240     while ((recPtr = chIter.nextElement()) != NULL) {
1241         rv = tbl->insertIndexNode(*tbl->trans, tupleptr, indxInfo, recPtr);
1242         if (rv == ErrUnique) {
1243             closeTable(tbl);
1244             dropIndex(indName);
1245             return rv;
1246         }
1247     }
1248     closeTable(tbl);
1249     printDebug(DM_Database, "Creating Hash Index Name:%s tblname:%s buckets:%x", indName, tblName, buckets);
1250     logFinest(Conf::logger, "Creating HashIndex %s on %s with bucket size %d", indName, tblName, buckets);
1251     return OK;
1252 }
1253
1254
1255 DbRetVal DatabaseManagerImpl::createTreeIndex(const char *indName, const char *tblName,
1256                       FieldNameList &fldList, int nodeSize, bool isUnique, bool isPrimary)
1257 {
1258     if (nodeSize < 20 || nodeSize > 20000)
1259     {
1260         printError(ErrBadRange,"Tree Index Node size %d not in range 20-20000",
1261                                  nodeSize);
1262         return ErrBadRange;
1263     }
1264     int totFlds = fldList.size();
1265     if (totFlds == 0) {
1266         printError(ErrBadCall, "No Field name specified");
1267         return ErrBadCall;
1268     }else if (totFlds != 1) {
1269         printError(ErrBadCall, "Composite index not supported for Tree");
1270         return ErrBadCall;
1271     }
1272     void *tptr =NULL;
1273     void *chunk = NULL;
1274     void *vcchunk = NULL;
1275     DbRetVal rv = systemDatabase_->getXCheckpointMutex();
1276     if (OK != rv)
1277     {
1278         printError(ErrSysInternal, "Unable to get database mutex");
1279         return ErrSysInternal;
1280     }
1281     //check whether table exists
1282
1283     CatalogTableTABLE cTable(systemDatabase_);
1284     cTable.getChunkAndTblPtr(tblName, chunk, tptr, vcchunk);
1285     if (NULL == tptr)
1286     {
1287         systemDatabase_->releaseCheckpointMutex();
1288         printError(ErrNotExists, "Table does not exist %s", tblName);
1289         return ErrNotExists;
1290     }
1291     char **fptr = new char* [totFlds];
1292     CatalogTableFIELD cField(systemDatabase_);
1293     rv = cField.getFieldPtrs(fldList, tptr, fptr);
1294     if (OK != rv)
1295     {
1296         delete[] fptr;
1297         systemDatabase_->releaseCheckpointMutex();
1298         if (rv != ErrBadCall) {
1299             printError(ErrNotExists, "Field does not exist");
1300             return ErrNotExists;
1301         }
1302     }
1303     for (int i=0; i <totFlds; i++)
1304     {
1305         CFIELD* fInfo = (CFIELD*)fptr[i];
1306         if (!fInfo->isNull_ && isPrimary )
1307         {
1308             printError(ErrBadArg, "Primary Index cannot be created on field without NOTNULL constraint");
1309             delete[] fptr;
1310             systemDatabase_->releaseCheckpointMutex();
1311             return ErrBadArg;
1312         }
1313         if (fInfo->type_ == typeVarchar)
1314         {
1315             printError(ErrBadArg, "Tree Index not supported for varchar type. Use char data type instead.");
1316             delete[] fptr;
1317            systemDatabase_->releaseCheckpointMutex();
1318             return ErrBadArg;
1319         }
1320
1321     }
1322     int chunkSize = sizeof(TreeNode)+(nodeSize * sizeof(void*));
1323     printDebug(DM_HashIndex, "Creating chunk for storing tree nodes of size %d\n", chunkSize);
1324
1325     Chunk* chunkInfo = createUserChunk(chunkSize);
1326     if (NULL == chunkInfo)
1327     {
1328         delete[] fptr;
1329         systemDatabase_->releaseCheckpointMutex();
1330         printError(ErrSysInternal, "Unable to create chunk");
1331         return ErrSysInternal;
1332     }
1333
1334
1335     void *tupleptr = NULL;
1336
1337     CatalogTableINDEX cIndex(systemDatabase_);
1338     rv = cIndex.insert(indName, tptr, fldList.size(), isUnique,
1339                         chunkInfo, nodeSize, NULL, tupleptr);
1340     if (OK != rv)
1341     {
1342         delete[] fptr;
1343         deleteUserChunk(chunkInfo);
1344         systemDatabase_->releaseCheckpointMutex();
1345         printError(ErrSysInternal, "Catalog table updation failed in INDEX table");
1346         return ErrSysInternal;
1347     }
1348     CatalogTableINDEXFIELD cIndexField(systemDatabase_);
1349     rv = cIndexField.insert(fldList, tupleptr, tptr, fptr);
1350
1351     if (OK != rv)
1352     {
1353         delete[] fptr;
1354         void *hChunk = NULL;
1355         cIndex.remove(indName, (void *&)chunkInfo, (void *&)hChunk, (void *&)tupleptr);
1356         deleteUserChunk(chunkInfo);
1357         systemDatabase_->releaseCheckpointMutex();
1358         printError(ErrSysInternal, "Catalog table updation failed in INDEXFIELD table");
1359         return ErrSysInternal;
1360     }
1361     delete[] fptr;
1362     systemDatabase_->releaseCheckpointMutex();
1363     //TODO::if tuples already present in this table, then create tree index '
1364     //nodes
1365     TableImpl *tbl = (TableImpl *) openTable(tblName);
1366     if (NULL == tbl) {
1367         printError(ErrSysInternal, "Unable to open table %s", tblName);
1368         return ErrSysInternal;
1369     }
1370     if (! tbl->numTuples()) {
1371         printDebug(DM_Database, "Creating Tree Index Name:%s tblname:%s node size:%x",indName, tblName, nodeSize);
1372         logFinest(Conf::logger, "Creating TreeIndex %s on %s with node size %d",indName, tblName, nodeSize);
1373         closeTable(tbl);
1374         return OK;
1375     }
1376     HashIndexInfo *indxInfo = NULL;
1377     int i = 0;
1378     for (i = 0; i < tbl->numIndexes_; i++) {
1379         if(((HashIndexInfo *)tbl->idxInfo[i])->indexPtr == tupleptr) {
1380             indxInfo = (HashIndexInfo *) tbl->idxInfo[i];
1381             break;
1382         }
1383     }
1384     void *recPtr = NULL;
1385     ChunkIterator chIter = ((Chunk *)chunk)->getIterator();
1386     tbl->setLoading(true);
1387     while ((recPtr = chIter.nextElement()) != NULL) {
1388         rv = tbl->insertIndexNode(*tbl->trans, tupleptr, indxInfo, recPtr);
1389         if (rv == ErrUnique) {
1390             dropIndex(indName);
1391             closeTable(tbl);
1392             return rv;
1393         }
1394     }
1395     closeTable(tbl);
1396     printDebug(DM_Database, "Creating Tree Index Name:%s tblname:%s node size:%x",
1397                                    indName, tblName, nodeSize);
1398     logFinest(Conf::logger, "Creating TreeIndex %s on %s with node size %d",
1399                                    indName, tblName, nodeSize);
1400     return OK;
1401 }
1402
1403 DbRetVal DatabaseManagerImpl::createTrieIndex(const char *indName, const char *tblName,
1404                       FieldNameList &fldList, bool isUnique, bool isPrimary)
1405 {
1406     int totFlds = fldList.size();
1407     void *tptr =NULL;
1408     char **fptr = new char* [totFlds];
1409     DbRetVal rv = validateIndex(tblName, fldList, &tptr, &fptr, isPrimary);
1410     if (OK != rv)
1411     {
1412         delete[] fptr;
1413         return rv;
1414     }
1415     rv = systemDatabase_->getXCheckpointMutex();
1416     if (OK != rv)
1417     {
1418         printError(ErrSysInternal, "Unable to get database mutex");
1419         return ErrSysInternal;
1420     }
1421
1422     //below statements are actually setting values in the catalog table
1423     //thats why mutex is taken before this stmt. Do not change the order
1424     CFIELD* fInfo = (CFIELD*)fptr[0];
1425     if(isPrimary){fInfo->isPrimary_=true;fInfo->isUnique_=true;}
1426     if(isUnique){fInfo->isUnique_=true;}
1427
1428     printDebug(DM_TrieIndex, "Creating chunk for storing trie nodes\n" );
1429     Chunk* chunkInfo = createUserChunk(sizeof(TrieNode));
1430
1431     //chunk to store the linked list of trie values
1432     Chunk* hChunk = createUserChunk(sizeof(IndexNode));
1433     if (NULL == chunkInfo || NULL == hChunk)
1434     {
1435         delete[] fptr;
1436         if (chunkInfo) deleteUserChunk(chunkInfo);
1437         systemDatabase_->releaseCheckpointMutex();
1438         printError(ErrSysInternal, "Unable to create trie node chunk");
1439         return ErrSysInternal;
1440     }
1441     chunkInfo->setChunkName(indName);
1442     hChunk->setChunkName(indName);
1443     rv = updateIndexCatalogTables(indName,tptr, fptr, fldList, isUnique,
1444                                   chunkInfo, hChunk );
1445     delete[] fptr;
1446     if (OK != rv) {
1447         printError(ErrSysInternal, "Catalog table updation failed");
1448         deleteUserChunk(chunkInfo);
1449         deleteUserChunk(hChunk);
1450         systemDatabase_->releaseCheckpointMutex();
1451         return rv;
1452     }
1453     systemDatabase_->releaseCheckpointMutex();
1454     //TODO:: create index nodes if records already exist in the table
1455     return OK;
1456 }
1457 DbRetVal DatabaseManagerImpl::validateIndex(const char *tblName,
1458                              FieldNameList &fldList, void **tptr, char ***fptr,
1459                              bool isPrimary)
1460 {
1461     int totFlds = fldList.size();
1462     if (totFlds != 1)
1463     {
1464         printError(ErrBadCall, "No Field name specified or composite fields specified");
1465         return ErrBadCall;
1466     }
1467     void *chunk = NULL;
1468     void *vcchunk = NULL;
1469     //check whether table exists
1470     CatalogTableTABLE cTable(systemDatabase_);
1471     cTable.getChunkAndTblPtr(tblName, chunk, *tptr, vcchunk);
1472     if (NULL == tptr)
1473     {
1474         printError(ErrNotExists, "Table does not exist %s", tblName);
1475         return ErrNotExists;
1476     }
1477
1478     //check whether field exists
1479     CatalogTableFIELD cField(systemDatabase_);
1480     DbRetVal rv = cField.getFieldPtrs(fldList, *tptr, *fptr);
1481     if (OK != rv)
1482     {
1483         if (rv != ErrBadCall) {
1484             printError(ErrNotExists, "Field does not exist");
1485             return ErrNotExists;
1486         }
1487     }
1488     CFIELD* fInfo = (CFIELD*)*fptr[0];
1489     if (!(fInfo->type_ == typeInt || fInfo->type_ == typeLongLong || fInfo->type_ == typeString || fInfo->type_ == typeVarchar))
1490     {
1491         printError(ErrBadArg, "Trie Index cannot be created for float or double or timestamp type");
1492         return ErrBadArg;
1493     }
1494     if (!fInfo->isNull_ && isPrimary )
1495     {
1496         printError(ErrBadArg, "Primary Index cannot be created on field without NOTNULL constraint");
1497         return ErrBadArg;
1498     }
1499
1500     return OK;
1501 }
1502
1503 DbRetVal DatabaseManagerImpl::updateIndexCatalogTables(const char *indName,
1504                         void *tptr, char **fptr, FieldNameList &fldList,
1505                         bool isUnique, Chunk* chunkInfo, Chunk* hChunk )
1506 {
1507     void *tupleptr = NULL;
1508     CatalogTableINDEX cIndex(systemDatabase_);
1509     DbRetVal rv = cIndex.insert(indName, tptr, fldList.size(), isUnique,
1510                         chunkInfo, 0, hChunk, tupleptr);
1511     if (OK != rv)
1512     {
1513         printError(ErrSysInternal, "Catalog table updation failed in INDEX table");
1514         return ErrSysInternal;
1515     }
1516     CatalogTableINDEXFIELD cIndexField(systemDatabase_);
1517     rv = cIndexField.insert(fldList, tupleptr, tptr, fptr);
1518     if (OK != rv)
1519     {
1520         //rollback the previous operation
1521         cIndex.remove(indName, (void *&)chunkInfo, (void *&)hChunk, (void *&)tupleptr);
1522         printError(ErrSysInternal, "Catalog table updation failed in INDEXFIELD table");
1523         return ErrSysInternal;
1524     }
1525     return rv;
1526 }
1527
1528 DbRetVal DatabaseManagerImpl::removeIndexCatalogTables(const char *name, void *&chunk, void *&hchunk, void *&tptr)
1529 {
1530     //remove the entry in INDEX
1531     CatalogTableINDEX cIndex(systemDatabase_);
1532     DbRetVal rv = cIndex.remove(name, chunk, hchunk, tptr);
1533     if (OK != rv)
1534     {
1535         printError(ErrSysInternal, "Catalog table updation failed for INDEX table");
1536         return ErrSysInternal;
1537     }
1538     printDebug(DM_Database, "Removing from INDEX %s",name);
1539     //remove the entries in the INDEXFIELD table
1540     CatalogTableINDEXFIELD cIndexField(systemDatabase_);
1541     rv = cIndexField.remove(tptr);
1542     if (OK != rv)
1543     {
1544         printError(ErrSysInternal, "Catalog table updation failed for INDEX table");
1545         return ErrSysInternal;
1546     }
1547     printDebug(DM_Database, "Removing from INDEXFIELD %s",name);
1548     return OK;
1549 }
1550 DbRetVal DatabaseManagerImpl::removeIndexChunks(void* chunk, void* hchunk, IndexType iType)
1551 {
1552     DbRetVal rv = deleteUserChunk((Chunk*)chunk);
1553     if (OK != rv)
1554     {
1555         printError(ErrSysInternal, "Unable to delete the index chunk");
1556         return ErrSysInternal;
1557     }
1558     //delete the index hash node chunk
1559     if (iType == hashIndex || iType == trieIndex) {
1560         rv = deleteUserChunk((Chunk*)hchunk);
1561         if (OK != rv)
1562         {
1563             printError(ErrSysInternal, "Unable to delete the index hash node chunk");
1564             return ErrSysInternal;
1565         }
1566     }
1567     return OK;
1568 }
1569
1570 void DatabaseManagerImpl::initHashBuckets(Bucket *buck, int bucketSize)
1571 {
1572     os::memset((void*)buck, 0, bucketSize * sizeof(Bucket));
1573     char mutName[IDENTIFIER_LENGTH];
1574     for (int i=0; i < bucketSize ; i++)
1575     {
1576         sprintf(mutName, "BKT:%d",i);
1577         buck[i].mutex_.init(mutName);
1578     }
1579     return;
1580 }
1581
1582 DbRetVal DatabaseManagerImpl::dropIndex(const char *name)
1583 {
1584     return dropIndexInt(name, true);
1585 }
1586
1587 DbRetVal DatabaseManagerImpl::dropIndexInt(const char *name, bool takeLock)
1588 {
1589     DbRetVal rv = OK;
1590     void *chunk = NULL, *hchunk = NULL;
1591     void *tptr =NULL;
1592     int ret = 0;
1593     if (takeLock) {
1594         rv = systemDatabase_->getXCheckpointMutex();
1595         if (OK != rv)
1596         {
1597             printError(ErrSysInternal, "Unable to get database mutex");
1598             return ErrSysInternal;
1599         }
1600     }
1601     rv = removeIndexCatalogTables(name, chunk, hchunk, tptr);
1602     if (OK != rv)
1603     {
1604         if (takeLock) systemDatabase_->releaseCheckpointMutex();
1605         return rv;
1606     }
1607
1608     CINDEX *iptr = (CINDEX*)tptr;
1609     rv = removeIndexChunks(chunk, hchunk, iptr->indexType_);
1610     if (OK != rv)
1611     {
1612         if (takeLock) systemDatabase_->releaseCheckpointMutex();
1613         return rv;
1614     }
1615     if (takeLock) systemDatabase_->releaseCheckpointMutex();
1616
1617     printDebug(DM_Database, "Dropped index %s",name);
1618     logFinest(Conf::logger, "Deleted Index %s", name);
1619     return OK;
1620 }
1621 DbRetVal DatabaseManagerImpl::createForeignKey(char *fKName,ForeignKeyInfo *info)
1622 {
1623    DbRetVal rv = OK;
1624    int totFkFlds = info->fkFldList.size();
1625    int totPkFlds = info->pkFldList.size();
1626    if (totFkFlds==0 && totPkFlds==0) {
1627         printError(ErrBadCall, "No Field name specified");
1628         return ErrBadCall;
1629    }
1630     void *tptr =NULL;
1631     void *chunk = NULL;
1632     void *vcchunk = NULL;
1633     rv = systemDatabase_->getXCheckpointMutex();
1634     if (OK != rv)
1635     {
1636         printError(ErrSysInternal, "Unable to get database mutex");
1637         return ErrSysInternal;
1638     }
1639     CatalogTableTABLE cTable(systemDatabase_);
1640     cTable.getChunkAndTblPtr(info->fkTableName, chunk, tptr, vcchunk);
1641     if (NULL == tptr)
1642     {
1643         systemDatabase_->releaseCheckpointMutex();
1644         printError(ErrNotExists, "Table does not exist %s", info->fkTableName);
1645         return ErrNotExists;
1646     }
1647     char **fptr = new char* [totFkFlds];
1648     CatalogTableFIELD cField(systemDatabase_);
1649     rv = cField.getFieldPtrs(info->fkFldList, tptr, fptr);
1650     if (OK != rv)
1651     {
1652         delete[] fptr;
1653         systemDatabase_->releaseCheckpointMutex();
1654         if (rv != ErrBadCall) {
1655             printError(ErrNotExists, "Field does not exist");
1656             return ErrNotExists;
1657         }
1658     }
1659     void *tPkptr =NULL;
1660     void *chunkPk = NULL;
1661     void *vcchunkPk = NULL;
1662     CatalogTableTABLE c2Table(systemDatabase_);
1663     c2Table.getChunkAndTblPtr(info->pkTableName, chunkPk, tPkptr, vcchunkPk);
1664     if (NULL == tPkptr)
1665     {
1666         systemDatabase_->releaseCheckpointMutex();
1667         printError(ErrNotExists, "Table does not exist %s", info->pkTableName);
1668         return ErrNotExists;
1669     }
1670     char **fPkptr = new char* [totPkFlds];
1671     CatalogTableFIELD c2Field(systemDatabase_);
1672     rv = c2Field.getFieldPtrs(info->pkFldList, tPkptr, fPkptr);
1673     if (OK != rv)
1674     {
1675         delete[] fptr;
1676         delete[] fPkptr;
1677         systemDatabase_->releaseCheckpointMutex();
1678         if (rv != ErrBadCall) {
1679             printError(ErrNotExists, "Field does not exist");
1680             return ErrNotExists;
1681         }
1682     }
1683     //Create New chunkdatanode
1684     CatalogTableFK cFK(systemDatabase_);
1685     rv = cFK.insert(fKName, tptr, tPkptr);//TODO
1686     if (OK != rv)
1687     {
1688         delete[] fptr;
1689         delete[] fPkptr;
1690         systemDatabase_->releaseCheckpointMutex();
1691         printError(ErrSysInternal, "Catalog table updation failed in CFK table");
1692         return ErrSysInternal;
1693     }
1694
1695     CatalogTableFKFIELD cFKField(systemDatabase_);
1696     rv = cFKField.insert(fKName,fptr,fPkptr,totFkFlds);
1697     if (OK != rv)
1698     {
1699         delete[] fptr;
1700         delete[] fPkptr;
1701         cFK.remove(tptr);
1702         systemDatabase_->releaseCheckpointMutex();
1703         printError(ErrSysInternal, "Catalog table updation failed in CFKFIELD table");
1704         return ErrSysInternal;
1705     }
1706     systemDatabase_->releaseCheckpointMutex();
1707     delete[] fptr;
1708     delete[] fPkptr;
1709     return rv;
1710 }
1711 DbRetVal DatabaseManagerImpl::dropForeignKey(void *tptr,bool trylock)
1712 {
1713     DbRetVal rv = OK;
1714     if(trylock){
1715         rv = systemDatabase_->getXCheckpointMutex();
1716         if (OK != rv)
1717         {
1718             printError(ErrSysInternal, "Unable to get database mutex");
1719             return ErrSysInternal;
1720         }
1721     }
1722     void *fkChunk=NULL;
1723     CatalogTableFK cFK(systemDatabase_);
1724     int total = cFK.getNoOfPkTable(tptr);
1725     //printDebug(DM_TEST,"total fk chunk %d",total);
1726     for (int i=0;i< total; i++)
1727     {
1728          fkChunk = cFK.getFkCTable(tptr);
1729          if(NULL==fkChunk)
1730          {
1731             if(trylock){
1732                 systemDatabase_->releaseCheckpointMutex();
1733             }
1734             printError(ErrSysInternal, "Catalog table not finds CFKFIELD table");
1735             return ErrSysInternal;
1736          }
1737          CatalogTableFKFIELD cFKField(systemDatabase_);
1738          rv = cFKField.remove(fkChunk);
1739          if (OK != rv)
1740          {
1741              if(trylock){
1742                 systemDatabase_->releaseCheckpointMutex();
1743              }
1744              printError(ErrSysInternal, "Catalog table updation failed in CFKFIELD table");
1745              return ErrSysInternal;
1746          }
1747          rv =cFK.remove(fkChunk);
1748          if (OK != rv)
1749          {
1750             if(trylock){
1751                 systemDatabase_->releaseCheckpointMutex();
1752             }
1753             printError(ErrSysInternal, "Catalog table updation failed for INDEX table");
1754             return ErrSysInternal;
1755          }
1756     }
1757     if(trylock){
1758         systemDatabase_->releaseCheckpointMutex();
1759     }
1760     return rv;
1761 }
1762
1763 void DatabaseManagerImpl::printTreeIndexNodeInfo(char *name, bool flag)
1764 {
1765     CatalogTableINDEX cIndex(systemDatabase_);
1766     DbRetVal rv = OK;
1767     void *chunk = NULL, *hchunk = NULL;
1768     void *tptr =NULL;
1769     rv = cIndex.get(name, chunk, hchunk, tptr);
1770     if (OK != rv) return;
1771     IndexType iType = CatalogTableINDEX::getType(tptr);
1772     if (treeIndex != iType)
1773     {
1774        printf("%s is not a tree index\n ");
1775        return;
1776     }
1777     Chunk *ch = (Chunk*) chunk;
1778     if(flag){  if(hchunk)((TreeNode*) hchunk)->displayAll(); }
1779     else {
1780         int offset = CatalogTableINDEX::getOffsetOfFirstField(tptr);
1781         //if(typeInt != offset) { printf("%s is not on Integer Type Field. To see info Index should be on integer type field. \n "); return;}
1782         if(hchunk) ((TreeNode*) hchunk)->displayAll(offset);
1783     }
1784 }
1785
1786 DbRetVal DatabaseManagerImpl::printIndexInfo(char *name)
1787 {
1788     CatalogTableINDEX cIndex(systemDatabase_);
1789     DbRetVal rv = OK;
1790     void *chunk = NULL, *hchunk = NULL;
1791     void *tptr =NULL;
1792     rv = cIndex.get(name, chunk, hchunk, tptr);
1793     if (OK != rv) return rv;
1794     printf("<IndexName> %s </IndexName>\n", name);
1795     printf("<Unique> %d </Unique>\n", CatalogTableINDEX::getUnique(tptr));
1796     IndexType iType = CatalogTableINDEX::getType(tptr);
1797     if(hashIndex == iType)
1798         printf("<Type> Hash Index </Type>\n");
1799     else if (treeIndex == iType)
1800         printf("<Type> Tree Index </Type>\n");
1801     else if (trieIndex == iType)
1802         printf("<Type> Trie Index </Type>\n");
1803     else
1804         printf("<Type> Unknown Index </Type>\n");
1805
1806     Chunk *ch = (Chunk*) chunk;
1807     printf("<HashBucket>\n");
1808     printf("  <TotalPages> %d </TotalPages>\n", ch->totalPages());
1809     printf("  <TotalBuckets> %d </TotalBuckets> \n", CatalogTableINDEX::getNoOfBuckets(tptr));
1810     printf("</HashBucket>\n");
1811     printf("<IndexNodes>\n");
1812     if(hashIndex == iType){
1813         ch = (Chunk*) hchunk;
1814         printf("  <TotalPages> %d </TotalPages>\n", ch->totalPages());
1815         printf("  <TotalNodes> %d </TotalNodes>\n", ch->getTotalDataNodes());
1816     } else if (treeIndex == iType) {
1817         printf("  <TotalNodes> %d </TotalNodes>\n", ch->getTotalDataNodes());
1818         if(hchunk)
1819             printf("  <TotalElements> %lld </TotalElements>\n",((TreeNode*) hchunk)->getTotalElements());
1820         else
1821             printf("  <TotalElements> 0 </TotalElements>\n");
1822     } else if (trieIndex == iType)
1823     {
1824         printf(" <TrieNodes> \n");
1825         printf("  <TotalPages> %d </TotalPages>\n", ch->totalPages());
1826         printf("  <TotalNodes> %d </TotalNodes>\n", ch->getTotalDataNodes());
1827         printf(" </TrieNodes> \n <TrieValues>\n");
1828         ch = (Chunk*) hchunk;
1829         printf("  <TotalPages> %d </TotalPages>\n", ch->totalPages());
1830         printf("  <TotalNodes> %d </TotalNodes>\n", ch->getTotalDataNodes());
1831         printf(" </TrieValues>\n");
1832     } else
1833     {
1834         printf("Unknown Index type\n");
1835     }
1836     printf("<IndexNodes>\n");
1837     return OK;
1838 }
1839
1840 DbRetVal DatabaseManagerImpl::registerThread()
1841 {
1842     DbRetVal rv = OK;
1843     if (pMgr_ != NULL)
1844     {
1845         printError(ErrAlready, "Process already registered\n");
1846         return ErrAlready;
1847     }
1848     pMgr_ = new ProcessManager();
1849     rv = pMgr_->registerThread();
1850     if (rv ==OK) {
1851         procSlot = pMgr_->getProcSlot();
1852         systemDatabase_->setProcSlot(procSlot);
1853         printDebug(DM_Process, "Process registed with slot %d\n", procSlot);
1854     }
1855     return rv;
1856 }
1857
1858 DbRetVal DatabaseManagerImpl::deregisterThread()
1859 {
1860     DbRetVal rv = OK;
1861     if (pMgr_ != NULL)
1862     {
1863         rv = pMgr_->deregisterThread(procSlot);
1864         delete pMgr_;
1865         pMgr_ = NULL;
1866     }
1867     return rv;
1868 }
1869
1870 bool DatabaseManagerImpl::isAnyOneRegistered()
1871 {
1872     if (pMgr_ != NULL) return pMgr_->isAnyOneRegistered();
1873     return true;
1874 }
1875
1876
1877 void DatabaseManagerImpl::printUsageStatistics()
1878 {
1879     pMgr_->printUsageStatistics();
1880     tMgr_->printUsageStatistics();
1881     lMgr_->printUsageStatistics();
1882 }
1883
1884 void DatabaseManagerImpl::printDebugLockInfo()
1885 {
1886     lMgr_->printDebugInfo();
1887 }
1888
1889 void DatabaseManagerImpl::printDebugTransInfo()
1890 {
1891     tMgr_->printDebugInfo(systemDatabase_);
1892 }
1893 void DatabaseManagerImpl::printDebugProcInfo()
1894 {
1895     pMgr_->printDebugInfo();
1896 }
1897 void DatabaseManagerImpl::printDebugMutexInfo()
1898 {
1899     Database *db = sysDb();
1900     db->printDebugMutexInfo();
1901     Chunk *chunk;
1902     int id=1;
1903     printf("<Chunk Mutexes>\n");
1904     chunk=db->getSystemDatabaseChunk(UserChunkTableId);
1905     while(id<MAX_CHUNKS)
1906     {
1907        chunk=db->getSystemDatabaseChunk(id);
1908        if((chunk->getChunkID())!=0){
1909           chunk->printMutexInfo();
1910        }
1911        id++;
1912     }
1913     chunk=db->getSystemDatabaseChunk(UserChunkTableId);
1914     size_t size=chunk->getSize();
1915     int noOfDataNodes=os::floor((PAGE_SIZE - sizeof(PageInfo))/size);
1916     Page* page=chunk->getFirstPage();
1917     int i=0;
1918     Chunk *chk;
1919     while(page)
1920     {
1921         char *data = ((char*)page) + sizeof(PageInfo);
1922         for (i = 0; i< noOfDataNodes; i++)
1923         {
1924             if (*((InUse*)data) == 1)
1925             {
1926                 chk=(Chunk*)((InUse*)data+1);
1927                 chk->printMutexInfo();
1928             }
1929             data = data + size;
1930         }
1931         page = (PageInfo*)(((PageInfo*)page)->nextPage_) ;
1932     }
1933     printf("</Chunk Mutexes>\n");
1934     lMgr_->printMutexInfo();
1935 }
1936 void DatabaseManagerImpl::printDebugChunkInfo()
1937 {
1938     Database *db = sysDb();
1939     Chunk *chunk;
1940     int id=1;
1941     printf("<Chunk information>\n");
1942     printf("  <System Chunk >\n");
1943     chunk=db->getSystemDatabaseChunk(UserChunkTableId);
1944     chunk->print();
1945     while(id<MAX_CHUNKS)
1946     {
1947        chunk=db->getSystemDatabaseChunk(id);
1948        if((chunk->getChunkID())!=0){
1949           chunk->print();
1950        }
1951        id++;
1952     }
1953     printf("  </System Chunk >\n");
1954     printf("  <User Chunk >\n");
1955     chunk=db->getSystemDatabaseChunk(UserChunkTableId);
1956     size_t size=chunk->getSize();
1957     int noOfDataNodes=os::floor((PAGE_SIZE - sizeof(PageInfo))/size);
1958     Page* page=chunk->getFirstPage();
1959     int i=0;
1960     Chunk *chk;
1961     while(page)
1962     {
1963         char *data = ((char*)page) + sizeof(PageInfo);
1964         for (i = 0; i< noOfDataNodes; i++)
1965         {
1966             if (*((InUse*)data) == 1)
1967             {
1968                 chk=(Chunk*)((InUse*)data+1);
1969                 chk->print();
1970             }
1971             data = data + size;
1972         }
1973         page = (PageInfo*)(((PageInfo*)page)->nextPage_) ;
1974     }
1975     printf("  </User Chunk >\n");
1976     printf("</Chunk information>\n");
1977     return;
1978 }
1979 ChunkIterator DatabaseManagerImpl::getSystemTableIterator(CatalogTableID id)
1980 {
1981     Chunk *fChunk = systemDatabase_->getSystemDatabaseChunk(id);
1982     return fChunk->getIterator();
1983 }
1984
1985 Chunk* DatabaseManagerImpl::getSystemTableChunk(CatalogTableID id)
1986 {
1987     return systemDatabase_->getSystemDatabaseChunk(id);
1988 }
1989
1990 int DatabaseManagerImpl::getNoOfPagesForTable(char *tblName)
1991 {
1992     Table *tbl = openTable(tblName);
1993     if (NULL == tbl) {
1994         printError(ErrSysInternal, "Unable to open table %s", tblName);
1995         return 0;
1996     }
1997     TableImpl *tb = (TableImpl *) tbl;
1998     int pages = 0;
1999     if (tb->numTuples()) pages = tb->pagesUsed();
2000     closeTable(tbl);
2001     return pages;
2002 }
2003
2004 DbRetVal DatabaseManagerImpl::loadRecords(char *tblName, char *buffer)
2005 {
2006     // buffer should be as big as the no of pages occupied by the records
2007     Table *tbl = openTable(tblName);
2008     if (NULL == tbl) {
2009         printError(ErrSysInternal, "Unable to open table %s", tblName);
2010         return ErrSysInternal;
2011     }
2012     TableImpl *tb = (TableImpl *) tbl;
2013     char *bufIter = buffer;
2014     int pages = *(int *) bufIter; bufIter += sizeof(int);
2015     Page *firstPage = ((Chunk *)(tb->chunkPtr_))->getFirstPage();
2016     PageInfo *pi = (PageInfo *) firstPage;
2017     memcpy(bufIter, pi, PAGE_SIZE);
2018     bufIter += PAGE_SIZE;
2019     for (int i = 0; i < pages - 1; i++) {
2020         Page *nPage = pi->nextPage_;
2021         memcpy(bufIter, nPage, PAGE_SIZE);
2022         bufIter += PAGE_SIZE;
2023         pi = (PageInfo *) nPage;
2024     }
2025     closeTable(tbl);
2026     return OK;
2027 }
2028
2029 DbRetVal DatabaseManagerImpl::pasteRecords(char *tblName, void *buffer)
2030 {
2031     // buffer should be as big as the no of pages occupied by the records
2032     Table *tbl = openTable(tblName);
2033     if (NULL == tbl) {
2034         printError(ErrSysInternal, "Unable to open table %s", tblName);
2035         return ErrSysInternal;
2036     }
2037     TableImpl *tb = (TableImpl *) tbl;
2038     Database *db = tb->getDB();
2039     char *bufIter = (char *) buffer;
2040     int pages = *(int *) bufIter;
2041     bufIter += sizeof(int);
2042
2043     Page *firstPage = ((Chunk *)(tb->chunkPtr_))->getFirstPage();
2044     PageInfo *pi = (PageInfo *) firstPage;
2045     memcpy(pi, bufIter, PAGE_SIZE);
2046     bufIter += PAGE_SIZE;
2047     while (--pages != 0) {
2048         //get a new page allocated
2049         Page *newPage = db->getFreePage();
2050         memcpy(newPage, bufIter, PAGE_SIZE);
2051         pi->nextPage_ = newPage;
2052         pi = (PageInfo *) newPage;
2053     }
2054     // initialize chunk details and pageInfo
2055     ((Chunk *)tb->chunkPtr_)->curPage_ = pi;
2056     closeTable(tbl);
2057     return OK;
2058 }
2059
2060 void DatabaseManagerImpl::setCanTakeCheckPoint(bool ctcp)
2061 { systemDatabase_->setCanTakeCheckPoint(ctcp); }
2062
2063 bool DatabaseManagerImpl::getCanTakeCheckPoint()
2064 { return systemDatabase_->getCanTakeCheckPoint(); }
2065
2066 DbRetVal DatabaseManagerImpl::checkPoint()
2067 {
2068     if (!systemDatabase_->getCanTakeCheckPoint()) {
2069         printf("Load / Cache / Replication process might be running. CheckPoint not taken\n");
2070         return ErrLoadingOn;
2071     }
2072     DbRetVal rv = systemDatabase_->getXCheckpointMutex();
2073     if (OK != rv ) {
2074         printError(rv, "Unable to get checkpoint mutex");
2075         return ErrLockTimeOut;
2076     }
2077     if (tMgr_ && !tMgr_->isTransactionConsistent(systemDatabase_)) {
2078         printf("not in transaction consistent point\n");
2079         systemDatabase_->releaseCheckpointMutex();
2080         return ErrLockTimeOut;
2081     }
2082     rv = writeSchemaFile();
2083     if (rv != OK) {
2084         printError(ErrSysInternal, "checkpoint error");
2085     }
2086     rv = db()->checkPoint();
2087     systemDatabase_->releaseCheckpointMutex();
2088     return rv;
2089 }
2090
2091 DbRetVal DatabaseManagerImpl::writeSchemaFile()
2092 {
2093     DbRetVal rv = OK;
2094     FILE *fp = NULL;
2095     FILE *fp1 = NULL;
2096     int fd = -1;
2097     char schFile[MAX_FILE_LEN];
2098     char mapFile[MAX_FILE_LEN];
2099     sprintf(schFile, "%s/db.chkpt.schema1", Conf::config.getDbFile());
2100     sprintf(mapFile, "%s/db.chkpt.map1", Conf::config.getDbFile());
2101     fp = fopen(schFile, "r");
2102     if (fp != NULL) {
2103         fclose(fp);
2104         int ret = unlink(schFile);
2105         if( ret != 0) {
2106             printError(ErrOS, "checkpoint: delete schema file failed");
2107             return ErrOS;
2108         }
2109     }
2110     fp = fopen(schFile, "w+");
2111     if (fp == NULL) {
2112             printError(ErrOS, "Unable to create schema file for chkpt.");
2113             return ErrOS;
2114     }
2115     fp1 = fopen(mapFile, "r");
2116     if (fp1 != NULL) {
2117         fclose(fp1);
2118         int ret = unlink(mapFile);
2119         if( ret != 0) {
2120             printError(ErrOS, "checkpoint: delete schema file failed");
2121             return ErrOS;
2122         }
2123     }
2124     fd = open(mapFile, O_WRONLY|O_CREAT, 0644);
2125     if (fd == -1) {
2126         printError(ErrOS, "checkpoint: Unable to create map file.");
2127         return ErrOS;
2128     }
2129     List tableList = getAllTableNames();
2130     ListIterator iter = tableList.getIterator();
2131     Identifier *elem = NULL;
2132     int count =0;
2133     while (iter.hasElement()) {
2134         elem = (Identifier*) iter.nextElement();
2135 //        if (TableConf::config.isTableCached(elem->name) == OK) continue;
2136         fprintf(fp, "CREATE TABLE %s (", elem->name);
2137         Table *table = openTable(elem->name);
2138         if (NULL == table) {
2139             printError(ErrSysInternal, "Unable to open table %s", elem->name);
2140             return ErrSysInternal;
2141         }
2142         void *chunk = NULL; void *tptr = NULL; void *vcchunk = NULL;
2143         CatalogTableTABLE cTable(systemDatabase_);
2144         rv = cTable.getChunkAndTblPtr(elem->name, chunk, tptr, vcchunk);
2145         struct Object obj;
2146         strcpy(obj.name, elem->name);
2147         obj.type = Tbl;
2148         obj.bucketChunk = NULL;
2149         obj.firstPage = ((Chunk *)chunk)->getFirstPage();
2150         obj.curPage = ((Chunk *)chunk)->getCurrentPage();
2151         void *buf = &obj;
2152         write(fd, buf, sizeof(obj));
2153         FieldInfo *info = new FieldInfo();
2154         List fNameList = table->getFieldNameList();
2155         ListIterator fNameIter = fNameList.getIterator();
2156         count++;
2157         bool firstField=true;
2158         char fieldName[IDENTIFIER_LENGTH];
2159         while (fNameIter.hasElement()) {
2160             elem = (Identifier*) fNameIter.nextElement();
2161             Table::getFieldNameAlone(elem->name, fieldName);
2162             rv = table->getFieldInfo(elem->name, info);
2163             if (rv !=OK)  {
2164                 printf("unable to retrive info for table %s\n", elem->name);
2165             }
2166             if (firstField) {
2167                 fprintf(fp, "%s %s ", fieldName, AllDataType::getSQLString(info->type));
2168                 firstField = false;
2169             } else
2170                 fprintf(fp, ", %s %s ", fieldName, AllDataType::getSQLString(info->type));
2171             if (info->type == typeString || info->type == typeVarchar ||
2172                                                       info->type == typeBinary)
2173                 fprintf(fp, "(%d)",info->length);
2174             if (info->isNull) fprintf(fp, " NOT NULL ");
2175             if (info->isDefault) fprintf(fp, " DEFAULT '%s' ", info->defaultValueBuf);
2176             if (info->isAutoIncrement) fprintf(fp, " AUTO_INCREMENT ");
2177         }
2178         fNameIter.reset();
2179         while (fNameIter.hasElement())
2180             delete ((FieldName *) fNameIter.nextElement());
2181         fNameList.reset();
2182
2183         fprintf(fp, ");\n");
2184         table->printSQLIndexString(fp, fd);
2185         delete info;
2186         closeTable(table);
2187     }
2188     ListIterator tIter = tableList.getIterator();
2189     tIter.reset();
2190     while (tIter.hasElement())
2191         delete ((FieldName *) tIter.nextElement());
2192     tableList.reset();
2193
2194     fclose(fp);
2195     close(fd);
2196     return OK;
2197 }
2198
2199 DbRetVal DatabaseManagerImpl::recover()
2200 {
2201     DbRetVal rv = OK;
2202     rv = sysDb()->recoverSystemDB();
2203     if (rv != OK) return rv;
2204     if (!Conf::config.useMmap())rv = db()->recoverUserDB();
2205     return rv;
2206 }
2207
2208 void DatabaseManagerImpl::sendSignal(int signal)
2209 {
2210     ThreadInfo* tInfo = sysDb()->getThreadInfo(0);
2211     for (int i=0; i < Conf::config.getMaxProcs(); i++)
2212     {
2213         if (tInfo->pid_ !=0) os::kill(tInfo->pid_, signal);
2214         tInfo++;
2215     }
2216 }