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     chunkInfo->initMutex();
 421     if (0 != size) chunkInfo->setSize(size);
 422     if (chunkInfo->allocSize_ > PAGE_SIZE)
 423         chunkInfo->curPage_ = db_->getFreePage(chunkInfo->allocSize_);
 424     else
 425         chunkInfo->curPage_ = db_->getFreePage();
 426     if ( NULL == chunkInfo->curPage_)
 427     {
 428         chunkInfo->destroyMutex();
 429         chunk->free(db_, ptr);
 430         printError(ErrNoMemory, "Database full: No space to allocate from database");
 431         return NULL;
 432     }
 433     PageInfo* firstPageInfo = ((PageInfo*)chunkInfo->curPage_);
 434     if (chunkInfo->allocSize_ > PAGE_SIZE)
 435     {
 436         int multiple = os::floor(chunkInfo->allocSize_ / PAGE_SIZE);
 437         int offset = ((multiple + 1) * PAGE_SIZE);
 438         firstPageInfo->setPageAsUsed(offset);
 439     }
 440     else
 441     {
 442         firstPageInfo->setPageAsUsed(chunkInfo->allocSize_);
 443         char *data = ((char*)firstPageInfo) + sizeof(PageInfo);
 444         *(InUse*)data =0;
 445     }
 446     if (0 == size)
 447     {
 448         VarSizeInfo *varInfo = (VarSizeInfo*)(((char*)firstPageInfo) + sizeof(PageInfo));
 449         varInfo->isUsed_ = 0;
 450         varInfo->size_ = PAGE_SIZE - sizeof(PageInfo) - sizeof(VarSizeInfo);
 451
 452     }
 453     chunkInfo->firstPage_ = chunkInfo->curPage_;
 454
 455     if (0 == size)
 456         chunkInfo->setAllocType(VariableSizeAllocator);
 457     else
 458         chunkInfo->setAllocType(FixedSizeAllocator);
 459
 460     //TODO::Generate chunkid::use tableid
 461     chunkInfo->setChunkID(db_->getUniqueIDForChunk());
 462     db_->incrementChunk();
 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     rv = lMgr_->getExclusiveLock(chunk, NULL);
 727     if (rv !=OK)
 728     {
 729         systemDatabase_->releaseCheckpointMutex();
 730         printError(ErrLockTimeOut, "Unable to acquire exclusive lock on the table\n");
 731         return rv;
 732     }
 733
 734     rv = cTable.remove(name, chunk, tptr);
 735     if (OK != rv) {
 736         systemDatabase_->releaseCheckpointMutex();
 737         printError(ErrSysInternal, "Unable to update catalog table TABLE");
 738         return ErrSysInternal;
 739     }
 740     printDebug(DM_Database,"Deleted from TABLE:%s",name);
 741
 742     //remove the entries in the FIELD table
 743     CatalogTableFIELD cField(systemDatabase_);
 744     rv = cField.remove(tptr);
 745     if (OK != rv) {
 746         systemDatabase_->releaseCheckpointMutex();
 747         printError(ErrSysInternal, "Unable to update catalog table FIELD");
 748         return ErrSysInternal;
 749     }
 750     printDebug(DM_Database,"Deleted from FIELD:%s",name);
 751
 752     rv = deleteUserChunk((Chunk*)chunk);
 753     if (OK != rv) {
 754         systemDatabase_->releaseCheckpointMutex();
 755         printError(rv, "Unable to delete the chunk");
 756         return rv;
 757     }
 758     printDebug(DM_Database,"Deleted UserChunk:%x", chunk);
 759
 760     if (vcchunk != NULL) {
 761         rv = deleteUserChunk((Chunk*)vcchunk);
 762         if (OK != rv) {
 763             systemDatabase_->releaseCheckpointMutex();
 764             printError(rv, "Unable to delete the chunk");
 765             return rv;
 766         }
 767         printDebug(DM_Database,"Deleted UserChunk for Varchar:%x", chunk);
 768     }
 769
 770     //TODO::check whether indexes are available and drop that also.
 771     CatalogTableINDEX cIndex(systemDatabase_);
 772     int noIndexes = cIndex.getNumIndexes(tptr);
 773     for (int i =1 ; i<= noIndexes; i++) {
 774         char *idxName = cIndex.getIndexName(tptr, 1);
 775         dropIndexInt(idxName, false);
 776     }
 777     bool isFkExist=cFK.isFkTable(tptr);
 778     if(isFkExist)
 779     {
 780        dropForeignKey(tptr,false);
 781     }
 782     systemDatabase_->releaseCheckpointMutex();
 783     printDebug(DM_Database, "Deleted Table %s" , name);
 784     logFinest(Conf::logger, "Deleted Table %s" , name);
 785     rv = lMgr_->releaseLock(chunk);
 786     if (rv !=OK)
 787     {
 788         printError(ErrLockTimeOut, "Unable to release exclusive lock on the table\n");
 789         return rv;
 790     }
 791     return OK;
 792 }
 793
 794 //Return values: NULL for table not found
 795 Table* DatabaseManagerImpl::openTable(const char *name,bool checkpkfk)
 796 {
 797     DbRetVal ret = OK;
 798     //TODO::store table handles in list so that if it is
 799     //not closed by the application. destructor shall close it.
 800     TableImpl *table = new TableImpl();
 801     table->setDB(db_);
 802     table->setSystemDB(systemDatabase_);
 803     table->setLockManager(lMgr_);
 804     table->setTrans(ProcessManager::getThreadTransAddr(systemDatabase_->procSlot));
 805
 806     //to store the chunk pointer of table
 807     void *chunk = NULL;
 808     void *vcchunk = NULL;
 809
 810     //to store the tuple pointer of the table
 811     void *tptr =NULL;
 812
 813     //TODO::need to take shared lock on the table so that
 814     //all ddl operation will be denied on that table
 815     //which includes index creation, alter table
 816
 817     DbRetVal rv = systemDatabase_->getAllocDatabaseMutex();
 818     if (OK != rv) {
 819         printError(ErrSysInternal, "Unable to get database mutex");
 820         delete table;
 821         return NULL;
 822     }
 823     CatalogTableTABLE cTable(systemDatabase_);
 824     ret = cTable.getChunkAndTblPtr(name, chunk, tptr, vcchunk);
 825     if ( OK != ret)
 826     {
 827         systemDatabase_->releaseAllocDatabaseMutex();
 828         delete table;
 829         printError(ErrNotExists, "Table not exists %s", name);
 830         return NULL;
 831     }
 832     CTABLE *tTuple = (CTABLE*)tptr;
 833     table->setTableInfo(tTuple->tblName_, tTuple->tblID_, tTuple->length_,
 834                         tTuple->numFlds_, tTuple->numIndexes_,
 835                         tTuple->chunkPtr_, tTuple->varcharChunkPtr_);
 836     /*rv = table->lock(true); //take shared lock
 837     if (rv !=OK)
 838     {
 839         printError(ErrLockTimeOut, "Unable to acquire shared lock on the table\n");
 840         systemDatabase_->releaseAllocDatabaseMutex();
 841         delete table;
 842         return NULL;
 843     }*/
 844
 845
 846     if (tTuple->numFlds_ <= 32)
 847     {
 848         table->isIntUsedForNULL = true;
 849         table->iNullInfo = 0;
 850         table->iNotNullInfo =0;
 851     }
 852     else
 853     {
 854         table->isIntUsedForNULL = false;
 855         int noFields = os::align(tTuple->numFlds_);
 856         table->cNullInfo = (char*) malloc(noFields);
 857         table->cNotNullInfo = (char*) malloc(noFields);
 858         for (int i =0 ; i < noFields; i++) table->cNullInfo[i] =0;
 859         for (int i =0 ; i < noFields; i++) table->cNotNullInfo[i] =0;
 860
 861     }
 862
 863     //get field information from FIELD table
 864     CatalogTableFIELD cField(systemDatabase_);
 865     table->ptrToAuto = cField.getFieldInfo(tptr, table->fldList_);
 866
 867     //populate the notnull info
 868     FieldIterator fIter = table->fldList_.getIterator();
 869     int fldpos=1;
 870     while (fIter.hasElement())
 871     {
 872         FieldDef *def = fIter.nextElement();
 873         if (table->isIntUsedForNULL) {
 874             if (def->isNull_) SETBIT(table->iNotNullInfo, fldpos-1);
 875         }
 876         else {
 877             if (def->isNull_) table->cNotNullInfo[fldpos-1] = 1;
 878         }
 879         fldpos++;
 880    }
 881
 882     //get the number of indexes on this table
 883     //and populate the indexPtr array
 884     CatalogTableINDEX cIndex(systemDatabase_);
 885     table->numIndexes_ = cIndex.getNumIndexes(tptr);
 886     if (table->numIndexes_) {
 887         table->indexPtr_ = new char*[table->numIndexes_];
 888         table->idxInfo = new IndexInfo*[table->numIndexes_];
 889     }
 890     else
 891     {
 892         table->indexPtr_ = NULL;
 893     }
 894     cIndex.getIndexPtrs(tptr, table->indexPtr_);
 895     for (int i =0 ; i < table->numIndexes_; i++ )
 896     {
 897         HashIndexInfo *hIdxInfo = new HashIndexInfo();
 898         CatalogTableINDEXFIELD cIndexField(systemDatabase_);
 899         cIndexField.getFieldInfo(table->indexPtr_[i], hIdxInfo->idxFldList);
 900         ChunkIterator citer = CatalogTableINDEX::getIterator(table->indexPtr_[i]);
 901         hIdxInfo->indexPtr = table->indexPtr_[i];
 902         hIdxInfo->indType = ((CINDEX*)hIdxInfo->indexPtr)->indexType_;
 903         hIdxInfo->noOfBuckets = CatalogTableINDEX::getNoOfBuckets(table->indexPtr_[i]);
 904         FieldIterator fIter = hIdxInfo->idxFldList.getIterator();
 905         bool firstFld = true;
 906         while (fIter.hasElement())
 907         {
 908             FieldDef *def = fIter.nextElement();
 909             if (firstFld)
 910             {
 911                 hIdxInfo->fldOffset = table->fldList_.getFieldOffset(def->fldName_);
 912                 hIdxInfo->type = table->fldList_.getFieldType(def->fldName_);
 913                 hIdxInfo->compLength = table->fldList_.getFieldLength(def->fldName_);
 914                 firstFld = false;
 915             }else {
 916                 hIdxInfo->type = typeComposite;
 917                 hIdxInfo->compLength = hIdxInfo->compLength +
 918                          table->fldList_.getFieldLength(def->fldName_);
 919             }
 920         }
 921
 922         hIdxInfo->isUnique = CatalogTableINDEX::getUnique(table->indexPtr_[i]);
 923         hIdxInfo->buckets = (Bucket*)citer.nextElement();
 924         table->idxInfo[i] = (IndexInfo*) hIdxInfo;
 925     }
 926     systemDatabase_->releaseAllocDatabaseMutex();
 927     //Foreign key Operation
 928     if(checkpkfk){
 929         CatalogTableFK cFk(systemDatabase_);
 930         int totalFld=0;
 931         table->numFkRelation_ = cFk.getNumFkTable(tptr);
 932         if (table->numFkRelation_) {
 933             table->isPkTbl=true;//TODO:for Delete In casecade
 934             totalFld=cFk.getNoOfFkTable(tptr);
 935             //printDebug(DM_TEST,"Total table is %d\n",totalFld);
 936             char **fptr = new char* [totalFld];
 937             cFk.getFkTableName(tptr,fptr);
 938             for(int count=0; count < totalFld; count++){
 939                //printDebug(DM_TEST,"FK Name is %s\n",fptr[count]);
 940                Table *pkTable=openTable(fptr[count],false);
 941                if (pkTable) table->tblFkList.append(pkTable);
 942                else {
 943                    printError(ErrSysInternal, "Unable to open foreign key tables");
 944                    delete[] fptr;
 945                    pkTable->close();
 946                    return NULL;
 947                }
 948             }
 949             delete[] fptr;
 950
 951         }
 952         char *tblName = NULL;
 953         table->isFkTbl = cFk.isFkTable(tptr);
 954         if(table->isFkTbl)
 955         {
 956             totalFld=cFk.getNoOfPkTable(tptr);
 957             char **fptr = new char* [totalFld];
 958             cFk.getPkTableName(tptr,fptr);
 959             for(int count=0; count<totalFld; count++){
 960                 //printDebug(DM_TEST,"Parent Name is %s\n",fptr[count]);
 961                 Table *fkTable = openTable(fptr[count],false);
 962                 if (fkTable) table->tblList.append(fkTable);
 963                 else {
 964                    printError(ErrSysInternal, "Unable to open foreign key tables");
 965                    delete[] fptr;
 966                    fkTable->close();
 967                    return NULL;
 968                }
 969             }
 970             delete[] fptr;
 971         }
 972     }
 973     printDebug(DM_Database,"Opening table handle name:%s chunk:%x numIndex:%d",
 974                                          name, chunk, table->numIndexes_);
 975     logFinest(Conf::logger, "Opening Table %s" , name);
 976     return table;
 977 }
 978
 979 List DatabaseManagerImpl::getAllTableNames(int *retval)
 980 {
 981     DbRetVal ret = OK;
 982     //to store the tuple pointer of the table
 983     void *tptr =NULL;
 984
 985     /*DbRetVal rv = systemDatabase_->getSCheckpointMutex();
 986     if (OK != rv) {
 987         printError(ErrSysInternal, "Unable to get checkpoint mutex");
 988         if(retval) *retval = rv;
 989         List tableList;
 990         return tableList;
 991     }*/
 992     CatalogTableTABLE cTable(systemDatabase_);
 993     List tableList = cTable.getTableList();
 994     //systemDatabase_->releaseCheckpointMutex();
 995     return tableList;
 996 }
 997
 998
 999
1000
1001 //Return values: -1 for table not found
1002 void DatabaseManagerImpl::closeTable(Table *table)
1003 {
1004     printDebug(DM_Database,"Closing table handle: %x", table);
1005     if (NULL == table) return;
1006     //table->unlock();
1007  /*   TableImpl *fkTbl =NULL;
1008     ListIterator tblIter = ((TableImpl*)table)->tblList.getIterator();
1009     tblIter.reset();
1010     while (tblIter.hasElement()){
1011         fkTbl = (TableImpl *) tblIter.nextElement();
1012         closeTable(fkTbl);
1013     }
1014     ((TableImpl*)table)->tblList.reset();
1015     tblIter = ((TableImpl*)table)->tblFkList.getIterator();
1016     tblIter.reset();
1017     while (tblIter.hasElement()){
1018         fkTbl = (TableImpl *) tblIter.nextElement();
1019         closeTable(fkTbl);
1020     }
1021     ((TableImpl*)table)->tblFkList.reset();*/
1022     if (table) delete table; table = NULL;
1023     logFinest(Conf::logger, "Closing Table");
1024 }
1025
1026 DbRetVal DatabaseManagerImpl::createIndex(const char *indName, IndexInitInfo *info)
1027 {
1028     DbRetVal rv = OK;
1029     if (!info->isUnique && info->isPrimary)
1030     {
1031         printError(ErrBadCall, "Primary key cannot be non unique\n");
1032         return ErrBadCall;
1033     }
1034     if (!Util::isIdentifier((char*)indName)) {
1035         printError(ErrBadArg, "Invalid character for index name");
1036         return ErrBadArg;
1037     }
1038
1039     if (info->indType == hashIndex)
1040     {
1041         //Assumes info is of type HashIndexInitInfo
1042         HashIndexInitInfo *hInfo = (HashIndexInitInfo*) info;
1043         rv = createHashIndex(indName, info->tableName, info->list, hInfo->bucketSize,
1044                              info->isUnique, info->isPrimary);
1045     }
1046     else if (info->indType == treeIndex)
1047     {
1048         HashIndexInitInfo *hInfo = (HashIndexInitInfo*) info;
1049         rv = createTreeIndex(indName, info->tableName, info->list,
1050                           hInfo->bucketSize, info->isUnique, info->isPrimary);
1051     }
1052     else if (info->indType == trieIndex)
1053     {
1054         HashIndexInitInfo *hInfo = (HashIndexInitInfo*) info;
1055         rv = createTrieIndex(indName, info->tableName, info->list,
1056                           info->isUnique, info->isPrimary);
1057
1058     }else {
1059         printError(ErrBadCall, "Index type not supported\n");
1060         return ErrBadCall;
1061     }
1062     return rv;
1063 }
1064
1065
1066 //-1 -> Table does not exists
1067 //-2 -> Field does not exists
1068 //-3 -> bucketSize is not valid
1069 DbRetVal DatabaseManagerImpl::createHashIndex(const char *indName, const char *tblName,
1070                       FieldNameList &fldList, int bucketSize, bool isUnique, bool isPrimary)
1071 {
1072     //validate the bucket size
1073     if (bucketSize < 100 || bucketSize > 200000)
1074     {
1075         printError(ErrBadRange, "Index Bucket size %d not in range 100-200000",
1076                                  bucketSize);
1077         return ErrBadRange;
1078     }
1079     int totFlds = fldList.size();
1080     if (totFlds == 0)
1081     {
1082         printError(ErrBadCall, "No Field name specified");
1083         return ErrBadCall;
1084     }
1085     void *tptr =NULL;
1086     void *chunk = NULL;
1087     void *vcchunk = NULL;
1088     DbRetVal rv = systemDatabase_->getXCheckpointMutex();
1089     if (OK != rv)
1090     {
1091         printError(ErrSysInternal, "Unable to get database mutex");
1092         return ErrSysInternal;
1093     }
1094
1095     //check whether table exists
1096     CatalogTableTABLE cTable(systemDatabase_);
1097     cTable.getChunkAndTblPtr(tblName, chunk, tptr, vcchunk);
1098     if (NULL == tptr)
1099     {
1100         systemDatabase_->releaseCheckpointMutex();
1101         printError(ErrNotExists, "Table does not exist %s", tblName);
1102         return ErrNotExists;
1103     }
1104
1105     //check whether field exists
1106     char **fptr = new char* [totFlds];
1107     CatalogTableFIELD cField(systemDatabase_);
1108     rv = cField.getFieldPtrs(fldList, tptr, fptr);
1109     if (OK != rv)
1110     {
1111         delete[] fptr;
1112         systemDatabase_->releaseCheckpointMutex();
1113         //TODO::check test cases of dbapi/Index, they give wrong results
1114         //if (rv == ErrBadCall) {
1115         ////    if (isPrimary) printError(ErrBadCall, "Field can have NULL values");
1116         //} else {
1117         //printError(ErrNotExists, "Field does not exist");
1118         //}
1119         //return ErrBadCall;
1120         if (rv != ErrBadCall) {
1121             printError(ErrNotExists, "Field does not exist");
1122             return ErrNotExists;
1123         }
1124     }
1125     for (int i=0; i <totFlds; i++)
1126     {
1127         CFIELD* fInfo = (CFIELD*)fptr[i];
1128         if (fInfo->type_ == typeFloat || fInfo->type_ == typeDouble || fInfo->type_ == typeTimeStamp)
1129         {
1130             printError(ErrBadArg, "HashIndex cannot be created for float or double or timestamp type");
1131             delete[] fptr;
1132             systemDatabase_->releaseCheckpointMutex();
1133             return ErrBadArg;
1134         }
1135         if (!fInfo->isNull_ && isPrimary )
1136         {
1137             printError(ErrBadArg, "Primary Index cannot be created on field without NOTNULL constraint");
1138             delete[] fptr;
1139             systemDatabase_->releaseCheckpointMutex();
1140             return ErrBadArg;
1141         }
1142          if(isPrimary){fInfo->isPrimary_=true;fInfo->isUnique_=true;}
1143          if(isUnique){fInfo->isUnique_=true;}
1144     }
1145     //create chunk to store the meta data of the index created
1146     //for latches and bucket pointers
1147     printDebug(DM_HashIndex, "Creating chunk for storing hash buckets of size %d\n",
1148                              bucketSize * sizeof(Bucket));
1149     Chunk* chunkInfo = createUserChunk(bucketSize * sizeof(Bucket));
1150     if (NULL == chunkInfo)
1151     {
1152         delete[] fptr;
1153         systemDatabase_->releaseCheckpointMutex();
1154         printError(ErrSysInternal, "Unable to create chunk");
1155         return ErrSysInternal;
1156     }
1157     chunkInfo->setChunkName(indName);
1158     //create memory for holding the bucket pointers
1159     void *buckets = chunkInfo->allocate(db_, &rv);
1160     if (NULL == buckets)
1161     {
1162         delete[] fptr;
1163         deleteUserChunk(chunkInfo);
1164         systemDatabase_->releaseCheckpointMutex();
1165         printError(rv, "Unable to allocate memory for bucket");
1166         return rv;
1167     }
1168     Bucket *buck = (Bucket*) buckets;
1169     initHashBuckets(buck, bucketSize);
1170
1171     //create chunk to store the hash index nodes
1172     Chunk* hChunk = createUserChunk(sizeof(IndexNode));
1173     if (NULL == hChunk)
1174     {
1175         delete[] fptr;
1176         deleteUserChunk(chunkInfo);
1177         systemDatabase_->releaseCheckpointMutex();
1178         printError(ErrSysInternal, "Unable to create chunk for storing hash index nodes");
1179         return ErrSysInternal;
1180     }
1181
1182      hChunk->setChunkName(indName);
1183     //add row to INDEX
1184     void *tupleptr = NULL;
1185     CatalogTableINDEX cIndex(systemDatabase_);
1186     rv = cIndex.insert(indName, tptr, fldList.size(), isUnique,
1187                         chunkInfo, bucketSize, hChunk, tupleptr);
1188     if (OK != rv)
1189     {
1190         delete[] fptr;
1191         deleteUserChunk(hChunk);
1192         deleteUserChunk(chunkInfo);
1193         systemDatabase_->releaseCheckpointMutex();
1194         printError(ErrSysInternal, "Catalog table updation failed in INDEX table");
1195         return ErrSysInternal;
1196     }
1197     //add rows to INDEXFIELD
1198     CatalogTableINDEXFIELD cIndexField(systemDatabase_);
1199     rv = cIndexField.insert(fldList, tupleptr, tptr, fptr);
1200
1201     if (OK != rv)
1202     {
1203         delete[] fptr;
1204         cIndex.remove(indName, (void *&)chunkInfo, (void *&)hChunk, (void *&)tupleptr);
1205         deleteUserChunk(hChunk);
1206         deleteUserChunk(chunkInfo);
1207         systemDatabase_->releaseCheckpointMutex();
1208         printError(ErrSysInternal, "Catalog table updation failed in INDEXFIELD table");
1209         return ErrSysInternal;
1210     }
1211     delete[] fptr;
1212     systemDatabase_->releaseCheckpointMutex();
1213
1214     //TODO:: Take table lock
1215
1216     // Following code is written by Kishor Amballi
1217     TableImpl *tbl = (TableImpl *) openTable(tblName);
1218     if (NULL == tbl) {
1219         printError(ErrSysInternal, "Unable to open table %s", tblName);
1220         return ErrSysInternal;
1221     }
1222     if (! tbl->numTuples()) {
1223         printDebug(DM_Database, "Creating Hash Index Name:%s tblname:%s buckets:%x", indName, tblName, buckets);
1224         logFinest(Conf::logger, "Creating HashIndex %s on %s with bucket size %d", indName, tblName, buckets);
1225         closeTable(tbl);
1226         return OK;
1227     }
1228     HashIndexInfo *indxInfo = NULL;
1229     int i = 0;
1230     for (i = 0; i < tbl->numIndexes_; i++) {
1231         if(((HashIndexInfo *)tbl->idxInfo[i])->indexPtr == tupleptr) {
1232             indxInfo = (HashIndexInfo *) tbl->idxInfo[i];
1233             break;
1234         }
1235     }
1236     void *recPtr = NULL;
1237     ChunkIterator chIter = ((Chunk *)chunk)->getIterator();
1238     tbl->setLoading(true);
1239     while ((recPtr = chIter.nextElement()) != NULL) {
1240         rv = tbl->insertIndexNode(*tbl->trans, tupleptr, indxInfo, recPtr);
1241         if (rv == ErrUnique) {
1242             closeTable(tbl);
1243             dropIndex(indName);
1244             return rv;
1245         }
1246     }
1247     closeTable(tbl);
1248     printDebug(DM_Database, "Creating Hash Index Name:%s tblname:%s buckets:%x", indName, tblName, buckets);
1249     logFinest(Conf::logger, "Creating HashIndex %s on %s with bucket size %d", indName, tblName, buckets);
1250     return OK;
1251 }
1252
1253
1254 DbRetVal DatabaseManagerImpl::createTreeIndex(const char *indName, const char *tblName,
1255                       FieldNameList &fldList, int nodeSize, bool isUnique, bool isPrimary)
1256 {
1257     if (nodeSize < 20 || nodeSize > 20000)
1258     {
1259         printError(ErrBadRange,"Tree Index Node size %d not in range 20-20000",
1260                                  nodeSize);
1261         return ErrBadRange;
1262     }
1263     int totFlds = fldList.size();
1264     if (totFlds == 0) {
1265         printError(ErrBadCall, "No Field name specified");
1266         return ErrBadCall;
1267     }else if (totFlds != 1) {
1268         printError(ErrBadCall, "Composite index not supported for Tree");
1269         return ErrBadCall;
1270     }
1271     void *tptr =NULL;
1272     void *chunk = NULL;
1273     void *vcchunk = NULL;
1274     DbRetVal rv = systemDatabase_->getXCheckpointMutex();
1275     if (OK != rv)
1276     {
1277         printError(ErrSysInternal, "Unable to get database mutex");
1278         return ErrSysInternal;
1279     }
1280     //check whether table exists
1281
1282     CatalogTableTABLE cTable(systemDatabase_);
1283     cTable.getChunkAndTblPtr(tblName, chunk, tptr, vcchunk);
1284     if (NULL == tptr)
1285     {
1286         systemDatabase_->releaseCheckpointMutex();
1287         printError(ErrNotExists, "Table does not exist %s", tblName);
1288         return ErrNotExists;
1289     }
1290     char **fptr = new char* [totFlds];
1291     CatalogTableFIELD cField(systemDatabase_);
1292     rv = cField.getFieldPtrs(fldList, tptr, fptr);
1293     if (OK != rv)
1294     {
1295         delete[] fptr;
1296         systemDatabase_->releaseCheckpointMutex();
1297         if (rv != ErrBadCall) {
1298             printError(ErrNotExists, "Field does not exist");
1299             return ErrNotExists;
1300         }
1301     }
1302     for (int i=0; i <totFlds; i++)
1303     {
1304         CFIELD* fInfo = (CFIELD*)fptr[i];
1305         if (!fInfo->isNull_ && isPrimary )
1306         {
1307             printError(ErrBadArg, "Primary Index cannot be created on field without NOTNULL constraint");
1308             delete[] fptr;
1309             systemDatabase_->releaseCheckpointMutex();
1310             return ErrBadArg;
1311         }
1312         if (fInfo->type_ == typeVarchar)
1313         {
1314             printError(ErrBadArg, "Tree Index not supported for varchar type. Use char data type instead.");
1315             delete[] fptr;
1316            systemDatabase_->releaseCheckpointMutex();
1317             return ErrBadArg;
1318         }
1319
1320     }
1321     int chunkSize = sizeof(TreeNode)+(nodeSize * sizeof(void*));
1322     printDebug(DM_HashIndex, "Creating chunk for storing tree nodes of size %d\n", chunkSize);
1323
1324     Chunk* chunkInfo = createUserChunk(chunkSize);
1325     if (NULL == chunkInfo)
1326     {
1327         delete[] fptr;
1328         systemDatabase_->releaseCheckpointMutex();
1329         printError(ErrSysInternal, "Unable to create chunk");
1330         return ErrSysInternal;
1331     }
1332
1333
1334     void *tupleptr = NULL;
1335
1336     CatalogTableINDEX cIndex(systemDatabase_);
1337     rv = cIndex.insert(indName, tptr, fldList.size(), isUnique,
1338                         chunkInfo, nodeSize, NULL, tupleptr);
1339     if (OK != rv)
1340     {
1341         delete[] fptr;
1342         deleteUserChunk(chunkInfo);
1343         systemDatabase_->releaseCheckpointMutex();
1344         printError(ErrSysInternal, "Catalog table updation failed in INDEX table");
1345         return ErrSysInternal;
1346     }
1347     CatalogTableINDEXFIELD cIndexField(systemDatabase_);
1348     rv = cIndexField.insert(fldList, tupleptr, tptr, fptr);
1349
1350     if (OK != rv)
1351     {
1352         delete[] fptr;
1353         void *hChunk = NULL;
1354         cIndex.remove(indName, (void *&)chunkInfo, (void *&)hChunk, (void *&)tupleptr);
1355         deleteUserChunk(chunkInfo);
1356         systemDatabase_->releaseCheckpointMutex();
1357         printError(ErrSysInternal, "Catalog table updation failed in INDEXFIELD table");
1358         return ErrSysInternal;
1359     }
1360     delete[] fptr;
1361     systemDatabase_->releaseCheckpointMutex();
1362     //TODO::if tuples already present in this table, then create tree index '
1363     //nodes
1364     TableImpl *tbl = (TableImpl *) openTable(tblName);
1365     if (NULL == tbl) {
1366         printError(ErrSysInternal, "Unable to open table %s", tblName);
1367         return ErrSysInternal;
1368     }
1369     if (! tbl->numTuples()) {
1370         printDebug(DM_Database, "Creating Tree Index Name:%s tblname:%s node size:%x",indName, tblName, nodeSize);
1371         logFinest(Conf::logger, "Creating TreeIndex %s on %s with node size %d",indName, tblName, nodeSize);
1372         closeTable(tbl);
1373         return OK;
1374     }
1375     HashIndexInfo *indxInfo = NULL;
1376     int i = 0;
1377     for (i = 0; i < tbl->numIndexes_; i++) {
1378         if(((HashIndexInfo *)tbl->idxInfo[i])->indexPtr == tupleptr) {
1379             indxInfo = (HashIndexInfo *) tbl->idxInfo[i];
1380             break;
1381         }
1382     }
1383     void *recPtr = NULL;
1384     ChunkIterator chIter = ((Chunk *)chunk)->getIterator();
1385     tbl->setLoading(true);
1386     while ((recPtr = chIter.nextElement()) != NULL) {
1387         rv = tbl->insertIndexNode(*tbl->trans, tupleptr, indxInfo, recPtr);
1388         if (rv == ErrUnique) {
1389             dropIndex(indName);
1390             closeTable(tbl);
1391             return rv;
1392         }
1393     }
1394     closeTable(tbl);
1395     printDebug(DM_Database, "Creating Tree Index Name:%s tblname:%s node size:%x",
1396                                    indName, tblName, nodeSize);
1397     logFinest(Conf::logger, "Creating TreeIndex %s on %s with node size %d",
1398                                    indName, tblName, nodeSize);
1399     return OK;
1400 }
1401
1402 DbRetVal DatabaseManagerImpl::createTrieIndex(const char *indName, const char *tblName,
1403                       FieldNameList &fldList, bool isUnique, bool isPrimary)
1404 {
1405     int totFlds = fldList.size();
1406     void *tptr =NULL;
1407     char **fptr = new char* [totFlds];
1408     DbRetVal rv = validateIndex(tblName, fldList, &tptr, &fptr, isPrimary);
1409     if (OK != rv)
1410     {
1411         delete[] fptr;
1412         return rv;
1413     }
1414     rv = systemDatabase_->getXCheckpointMutex();
1415     if (OK != rv)
1416     {
1417         printError(ErrSysInternal, "Unable to get database mutex");
1418         return ErrSysInternal;
1419     }
1420
1421     //below statements are actually setting values in the catalog table
1422     //thats why mutex is taken before this stmt. Do not change the order
1423     CFIELD* fInfo = (CFIELD*)fptr[0];
1424     if(isPrimary){fInfo->isPrimary_=true;fInfo->isUnique_=true;}
1425     if(isUnique){fInfo->isUnique_=true;}
1426
1427     printDebug(DM_TrieIndex, "Creating chunk for storing trie nodes\n" );
1428     Chunk* chunkInfo = createUserChunk(sizeof(TrieNode));
1429
1430     //chunk to store the linked list of trie values
1431     Chunk* hChunk = createUserChunk(sizeof(IndexNode));
1432     if (NULL == chunkInfo || NULL == hChunk)
1433     {
1434         delete[] fptr;
1435         if (chunkInfo) deleteUserChunk(chunkInfo);
1436         systemDatabase_->releaseCheckpointMutex();
1437         printError(ErrSysInternal, "Unable to create trie node chunk");
1438         return ErrSysInternal;
1439     }
1440     chunkInfo->setChunkName(indName);
1441     hChunk->setChunkName(indName);
1442     rv = updateIndexCatalogTables(indName,tptr, fptr, fldList, isUnique,
1443                                   chunkInfo, hChunk );
1444     delete[] fptr;
1445     if (OK != rv) {
1446         printError(ErrSysInternal, "Catalog table updation failed");
1447         deleteUserChunk(chunkInfo);
1448         deleteUserChunk(hChunk);
1449         systemDatabase_->releaseCheckpointMutex();
1450         return rv;
1451     }
1452     systemDatabase_->releaseCheckpointMutex();
1453     //TODO:: create index nodes if records already exist in the table
1454     return OK;
1455 }
1456 DbRetVal DatabaseManagerImpl::validateIndex(const char *tblName,
1457                              FieldNameList &fldList, void **tptr, char ***fptr,
1458                              bool isPrimary)
1459 {
1460     int totFlds = fldList.size();
1461     if (totFlds != 1)
1462     {
1463         printError(ErrBadCall, "No Field name specified or composite fields specified");
1464         return ErrBadCall;
1465     }
1466     void *chunk = NULL;
1467     void *vcchunk = NULL;
1468     //check whether table exists
1469     CatalogTableTABLE cTable(systemDatabase_);
1470     cTable.getChunkAndTblPtr(tblName, chunk, *tptr, vcchunk);
1471     if (NULL == tptr)
1472     {
1473         printError(ErrNotExists, "Table does not exist %s", tblName);
1474         return ErrNotExists;
1475     }
1476
1477     //check whether field exists
1478     CatalogTableFIELD cField(systemDatabase_);
1479     DbRetVal rv = cField.getFieldPtrs(fldList, *tptr, *fptr);
1480     if (OK != rv)
1481     {
1482         if (rv != ErrBadCall) {
1483             printError(ErrNotExists, "Field does not exist");
1484             return ErrNotExists;
1485         }
1486     }
1487     CFIELD* fInfo = (CFIELD*)fptr[0];
1488     if (!(fInfo->type_ == typeInt || fInfo->type_ == typeLong || fInfo->type_ == typeLongLong || fInfo->type_ == typeString
1489 || 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
1574     for (int i=0; i < bucketSize ; i++)
1575     {
1576         buck[i].mutex_.init("Bucket");
1577     }
1578     return;
1579 }
1580
1581 DbRetVal DatabaseManagerImpl::dropIndex(const char *name)
1582 {
1583     return dropIndexInt(name, true);
1584 }
1585
1586 DbRetVal DatabaseManagerImpl::dropIndexInt(const char *name, bool takeLock)
1587 {
1588     DbRetVal rv = OK;
1589     void *chunk = NULL, *hchunk = NULL;
1590     void *tptr =NULL;
1591     int ret = 0;
1592     if (takeLock) {
1593         rv = systemDatabase_->getXCheckpointMutex();
1594         if (OK != rv)
1595         {
1596             printError(ErrSysInternal, "Unable to get database mutex");
1597             return ErrSysInternal;
1598         }
1599     }
1600     rv = removeIndexCatalogTables(name, chunk, hchunk, tptr);
1601     if (OK != rv)
1602     {
1603         if (takeLock) systemDatabase_->releaseCheckpointMutex();
1604         return rv;
1605     }
1606
1607     CINDEX *iptr = (CINDEX*)tptr;
1608     rv = removeIndexChunks(chunk, hchunk, iptr->indexType_);
1609     if (OK != rv)
1610     {
1611         if (takeLock) systemDatabase_->releaseCheckpointMutex();
1612         return rv;
1613     }
1614     if (takeLock) systemDatabase_->releaseCheckpointMutex();
1615
1616     printDebug(DM_Database, "Dropped index %s",name);
1617     logFinest(Conf::logger, "Deleted Index %s", name);
1618     return OK;
1619 }
1620 DbRetVal DatabaseManagerImpl::createForeignKey(char *fKName,ForeignKeyInfo *info)
1621 {
1622    DbRetVal rv = OK;
1623    int totFkFlds = info->fkFldList.size();
1624    int totPkFlds = info->pkFldList.size();
1625    if (totFkFlds==0 && totPkFlds==0) {
1626         printError(ErrBadCall, "No Field name specified");
1627         return ErrBadCall;
1628    }
1629     void *tptr =NULL;
1630     void *chunk = NULL;
1631     void *vcchunk = NULL;
1632     rv = systemDatabase_->getXCheckpointMutex();
1633     if (OK != rv)
1634     {
1635         printError(ErrSysInternal, "Unable to get database mutex");
1636         return ErrSysInternal;
1637     }
1638     CatalogTableTABLE cTable(systemDatabase_);
1639     cTable.getChunkAndTblPtr(info->fkTableName, chunk, tptr, vcchunk);
1640     if (NULL == tptr)
1641     {
1642         systemDatabase_->releaseCheckpointMutex();
1643         printError(ErrNotExists, "Table does not exist %s", info->fkTableName);
1644         return ErrNotExists;
1645     }
1646     char **fptr = new char* [totFkFlds];
1647     CatalogTableFIELD cField(systemDatabase_);
1648     rv = cField.getFieldPtrs(info->fkFldList, tptr, fptr);
1649     if (OK != rv)
1650     {
1651         delete[] fptr;
1652         systemDatabase_->releaseCheckpointMutex();
1653         if (rv != ErrBadCall) {
1654             printError(ErrNotExists, "Field does not exist");
1655             return ErrNotExists;
1656         }
1657     }
1658     void *tPkptr =NULL;
1659     void *chunkPk = NULL;
1660     void *vcchunkPk = NULL;
1661     CatalogTableTABLE c2Table(systemDatabase_);
1662     c2Table.getChunkAndTblPtr(info->pkTableName, chunkPk, tPkptr, vcchunkPk);
1663     if (NULL == tPkptr)
1664     {
1665         systemDatabase_->releaseCheckpointMutex();
1666         printError(ErrNotExists, "Table does not exist %s", info->pkTableName);
1667         return ErrNotExists;
1668     }
1669     char **fPkptr = new char* [totPkFlds];
1670     CatalogTableFIELD c2Field(systemDatabase_);
1671     rv = c2Field.getFieldPtrs(info->pkFldList, tPkptr, fPkptr);
1672     if (OK != rv)
1673     {
1674         delete[] fptr;
1675         delete[] fPkptr;
1676         systemDatabase_->releaseCheckpointMutex();
1677         if (rv != ErrBadCall) {
1678             printError(ErrNotExists, "Field does not exist");
1679             return ErrNotExists;
1680         }
1681     }
1682     //Create New chunkdatanode
1683     CatalogTableFK cFK(systemDatabase_);
1684     rv = cFK.insert(fKName, tptr, tPkptr);//TODO
1685     if (OK != rv)
1686     {
1687         delete[] fptr;
1688         delete[] fPkptr;
1689         systemDatabase_->releaseCheckpointMutex();
1690         printError(ErrSysInternal, "Catalog table updation failed in CFK table");
1691         return ErrSysInternal;
1692     }
1693
1694     CatalogTableFKFIELD cFKField(systemDatabase_);
1695     rv = cFKField.insert(fKName,fptr,fPkptr,totFkFlds);
1696     if (OK != rv)
1697     {
1698         delete[] fptr;
1699         delete[] fPkptr;
1700         cFK.remove(tptr);
1701         systemDatabase_->releaseCheckpointMutex();
1702         printError(ErrSysInternal, "Catalog table updation failed in CFKFIELD table");
1703         return ErrSysInternal;
1704     }
1705     systemDatabase_->releaseCheckpointMutex();
1706     delete[] fptr;
1707     delete[] fPkptr;
1708     return rv;
1709 }
1710 DbRetVal DatabaseManagerImpl::dropForeignKey(void *tptr,bool trylock)
1711 {
1712     DbRetVal rv = OK;
1713     if(trylock){
1714         rv = systemDatabase_->getXCheckpointMutex();
1715         if (OK != rv)
1716         {
1717             printError(ErrSysInternal, "Unable to get database mutex");
1718             return ErrSysInternal;
1719         }
1720     }
1721     void *fkChunk=NULL;
1722     CatalogTableFK cFK(systemDatabase_);
1723     int total = cFK.getNoOfPkTable(tptr);
1724     //printDebug(DM_TEST,"total fk chunk %d",total);
1725     for (int i=0;i< total; i++)
1726     {
1727          fkChunk = cFK.getFkCTable(tptr);
1728          if(NULL==fkChunk)
1729          {
1730             if(trylock){
1731                 systemDatabase_->releaseCheckpointMutex();
1732             }
1733             printError(ErrSysInternal, "Catalog table not finds CFKFIELD table");
1734             return ErrSysInternal;
1735          }
1736          CatalogTableFKFIELD cFKField(systemDatabase_);
1737          rv = cFKField.remove(fkChunk);
1738          if (OK != rv)
1739          {
1740              if(trylock){
1741                 systemDatabase_->releaseCheckpointMutex();
1742              }
1743              printError(ErrSysInternal, "Catalog table updation failed in CFKFIELD table");
1744              return ErrSysInternal;
1745          }
1746          rv =cFK.remove(fkChunk);
1747          if (OK != rv)
1748          {
1749             if(trylock){
1750                 systemDatabase_->releaseCheckpointMutex();
1751             }
1752             printError(ErrSysInternal, "Catalog table updation failed for INDEX table");
1753             return ErrSysInternal;
1754          }
1755     }
1756     if(trylock){
1757         systemDatabase_->releaseCheckpointMutex();
1758     }
1759     return rv;
1760 }
1761
1762 void DatabaseManagerImpl::printTreeIndexNodeInfo(char *name, bool flag)
1763 {
1764     CatalogTableINDEX cIndex(systemDatabase_);
1765     DbRetVal rv = OK;
1766     void *chunk = NULL, *hchunk = NULL;
1767     void *tptr =NULL;
1768     rv = cIndex.get(name, chunk, hchunk, tptr);
1769     if (OK != rv) return;
1770     IndexType iType = CatalogTableINDEX::getType(tptr);
1771     if (treeIndex != iType)
1772     {
1773        printf("%s is not a tree index\n ");
1774        return;
1775     }
1776     Chunk *ch = (Chunk*) chunk;
1777     if(flag){  if(hchunk)((TreeNode*) hchunk)->displayAll(); }
1778     else {
1779         int offset = CatalogTableINDEX::getOffsetOfFirstField(tptr);
1780         //if(typeInt != offset) { printf("%s is not on Integer Type Field. To see info Index should be on integer type field. \n "); return;}
1781         if(hchunk) ((TreeNode*) hchunk)->displayAll(offset);
1782     }
1783 }
1784
1785 DbRetVal DatabaseManagerImpl::printIndexInfo(char *name)
1786 {
1787     CatalogTableINDEX cIndex(systemDatabase_);
1788     DbRetVal rv = OK;
1789     void *chunk = NULL, *hchunk = NULL;
1790     void *tptr =NULL;
1791     rv = cIndex.get(name, chunk, hchunk, tptr);
1792     if (OK != rv) return rv;
1793     printf("<IndexName> %s </IndexName>\n", name);
1794     printf("<Unique> %d </Unique>\n", CatalogTableINDEX::getUnique(tptr));
1795     IndexType iType = CatalogTableINDEX::getType(tptr);
1796     if(hashIndex == iType)
1797         printf("<Type> Hash Index </Type>\n");
1798     else if (treeIndex == iType)
1799         printf("<Type> Tree Index </Type>\n");
1800     else if (trieIndex == iType)
1801         printf("<Type> Trie Index </Type>\n");
1802     else
1803         printf("<Type> Unknown Index </Type>\n");
1804
1805     Chunk *ch = (Chunk*) chunk;
1806     printf("<HashBucket>\n");
1807     printf("  <TotalPages> %d </TotalPages>\n", ch->totalPages());
1808     printf("  <TotalBuckets> %d </TotalBuckets> \n", CatalogTableINDEX::getNoOfBuckets(tptr));
1809     printf("</HashBucket>\n");
1810     printf("<IndexNodes>\n");
1811     if(hashIndex == iType){
1812         ch = (Chunk*) hchunk;
1813         printf("  <TotalPages> %d </TotalPages>\n", ch->totalPages());
1814         printf("  <TotalNodes> %d </TotalNodes>\n", ch->getTotalDataNodes());
1815     } else if (treeIndex == iType) {
1816         printf("  <TotalNodes> %d </TotalNodes>\n", ch->getTotalDataNodes());
1817         if(hchunk)
1818             printf("  <TotalElements> %lld </TotalElements>\n",((TreeNode*) hchunk)->getTotalElements());
1819         else
1820             printf("  <TotalElements> 0 </TotalElements>\n");
1821     } else if (trieIndex == iType)
1822     {
1823         printf(" <TrieNodes> \n");
1824         printf("  <TotalPages> %d </TotalPages>\n", ch->totalPages());
1825         printf("  <TotalNodes> %d </TotalNodes>\n", ch->getTotalDataNodes());
1826         printf(" </TrieNodes> \n <TrieValues>\n");
1827         ch = (Chunk*) hchunk;
1828         printf("  <TotalPages> %d </TotalPages>\n", ch->totalPages());
1829         printf("  <TotalNodes> %d </TotalNodes>\n", ch->getTotalDataNodes());
1830         printf(" </TrieValues>\n");
1831     } else
1832     {
1833         printf("Unknown Index type\n");
1834     }
1835     printf("<IndexNodes>\n");
1836     return OK;
1837 }
1838
1839 DbRetVal DatabaseManagerImpl::registerThread()
1840 {
1841     DbRetVal rv = OK;
1842     if (pMgr_ != NULL)
1843     {
1844         printError(ErrAlready, "Process already registered\n");
1845         return ErrAlready;
1846     }
1847     pMgr_ = new ProcessManager();
1848     rv = pMgr_->registerThread();
1849     if (rv ==OK) {
1850         procSlot = pMgr_->getProcSlot();
1851         systemDatabase_->setProcSlot(procSlot);
1852         printDebug(DM_Process, "Process registed with slot %d\n", procSlot);
1853     }
1854     return rv;
1855 }
1856
1857 DbRetVal DatabaseManagerImpl::deregisterThread()
1858 {
1859     DbRetVal rv = OK;
1860     if (pMgr_ != NULL)
1861     {
1862         rv = pMgr_->deregisterThread(procSlot);
1863         delete pMgr_;
1864         pMgr_ = NULL;
1865     }
1866     return rv;
1867 }
1868
1869 bool DatabaseManagerImpl::isAnyOneRegistered()
1870 {
1871     if (pMgr_ != NULL) return pMgr_->isAnyOneRegistered();
1872     return true;
1873 }
1874
1875
1876 void DatabaseManagerImpl::printUsageStatistics()
1877 {
1878     pMgr_->printUsageStatistics();
1879     tMgr_->printUsageStatistics();
1880     lMgr_->printUsageStatistics();
1881 }
1882
1883 void DatabaseManagerImpl::printDebugLockInfo()
1884 {
1885     lMgr_->printDebugInfo();
1886 }
1887
1888 void DatabaseManagerImpl::printDebugTransInfo()
1889 {
1890     tMgr_->printDebugInfo(systemDatabase_);
1891 }
1892 void DatabaseManagerImpl::printDebugProcInfo()
1893 {
1894     pMgr_->printDebugInfo();
1895 }
1896 void DatabaseManagerImpl::printDebugChunkInfo()
1897 {
1898     printf("<NotYetImplemented> </NotYetImplemented>\n");
1899 }
1900 ChunkIterator DatabaseManagerImpl::getSystemTableIterator(CatalogTableID id)
1901 {
1902     Chunk *fChunk = systemDatabase_->getSystemDatabaseChunk(id);
1903     return fChunk->getIterator();
1904 }
1905
1906 Chunk* DatabaseManagerImpl::getSystemTableChunk(CatalogTableID id)
1907 {
1908     return systemDatabase_->getSystemDatabaseChunk(id);
1909 }
1910
1911 int DatabaseManagerImpl::getNoOfPagesForTable(char *tblName)
1912 {
1913     Table *tbl = openTable(tblName);
1914     if (NULL == tbl) {
1915         printError(ErrSysInternal, "Unable to open table %s", tblName);
1916         return 0;
1917     }
1918     TableImpl *tb = (TableImpl *) tbl;
1919     int pages = 0;
1920     if (tb->numTuples()) pages = tb->pagesUsed();
1921     closeTable(tbl);
1922     return pages;
1923 }
1924
1925 DbRetVal DatabaseManagerImpl::loadRecords(char *tblName, char *buffer)
1926 {
1927     // buffer should be as big as the no of pages occupied by the records
1928     Table *tbl = openTable(tblName);
1929     if (NULL == tbl) {
1930         printError(ErrSysInternal, "Unable to open table %s", tblName);
1931         return ErrSysInternal;
1932     }
1933     TableImpl *tb = (TableImpl *) tbl;
1934     char *bufIter = buffer;
1935     int pages = *(int *) bufIter; bufIter += sizeof(int);
1936     Page *firstPage = ((Chunk *)(tb->chunkPtr_))->getFirstPage();
1937     PageInfo *pi = (PageInfo *) firstPage;
1938     memcpy(bufIter, pi, PAGE_SIZE);
1939     bufIter += PAGE_SIZE;
1940     for (int i = 0; i < pages - 1; i++) {
1941         Page *nPage = pi->nextPage_;
1942         memcpy(bufIter, nPage, PAGE_SIZE);
1943         bufIter += PAGE_SIZE;
1944         pi = (PageInfo *) nPage;
1945     }
1946     closeTable(tbl);
1947     return OK;
1948 }
1949
1950 DbRetVal DatabaseManagerImpl::pasteRecords(char *tblName, void *buffer)
1951 {
1952     // buffer should be as big as the no of pages occupied by the records
1953     Table *tbl = openTable(tblName);
1954     if (NULL == tbl) {
1955         printError(ErrSysInternal, "Unable to open table %s", tblName);
1956         return ErrSysInternal;
1957     }
1958     TableImpl *tb = (TableImpl *) tbl;
1959     Database *db = tb->getDB();
1960     char *bufIter = (char *) buffer;
1961     int pages = *(int *) bufIter;
1962     bufIter += sizeof(int);
1963
1964     Page *firstPage = ((Chunk *)(tb->chunkPtr_))->getFirstPage();
1965     PageInfo *pi = (PageInfo *) firstPage;
1966     memcpy(pi, bufIter, PAGE_SIZE);
1967     bufIter += PAGE_SIZE;
1968     while (--pages != 0) {
1969         //get a new page allocated
1970         Page *newPage = db->getFreePage();
1971         memcpy(newPage, bufIter, PAGE_SIZE);
1972         pi->nextPage_ = newPage;
1973         pi = (PageInfo *) newPage;
1974     }
1975     // initialize chunk details and pageInfo
1976     ((Chunk *)tb->chunkPtr_)->curPage_ = pi;
1977     closeTable(tbl);
1978     return OK;
1979 }
1980
1981 void DatabaseManagerImpl::setCanTakeCheckPoint(bool ctcp)
1982 { systemDatabase_->setCanTakeCheckPoint(ctcp); }
1983
1984 bool DatabaseManagerImpl::getCanTakeCheckPoint()
1985 { return systemDatabase_->getCanTakeCheckPoint(); }
1986
1987 DbRetVal DatabaseManagerImpl::checkPoint()
1988 {
1989     if (!systemDatabase_->getCanTakeCheckPoint()) {
1990         printf("Load / Cache / Replication process might be running. CheckPoint not taken\n");
1991         return ErrLoadingOn;
1992     }
1993     DbRetVal rv = systemDatabase_->getXCheckpointMutex();
1994     if (OK != rv ) {
1995         printError(rv, "Unable to get checkpoint mutex");
1996         return ErrLockTimeOut;
1997     }
1998     if (tMgr_ && !tMgr_->isTransactionConsistent(systemDatabase_)) {
1999         printf("not in transaction consistent point\n");
2000         systemDatabase_->releaseCheckpointMutex();
2001         return ErrLockTimeOut;
2002     }
2003     rv = writeSchemaFile();
2004     if (rv != OK) {
2005         printError(ErrSysInternal, "checkpoint error");
2006     }
2007     rv = db()->checkPoint();
2008     systemDatabase_->releaseCheckpointMutex();
2009     return rv;
2010 }
2011
2012 DbRetVal DatabaseManagerImpl::writeSchemaFile()
2013 {
2014     DbRetVal rv = OK;
2015     FILE *fp = NULL;
2016     FILE *fp1 = NULL;
2017     int fd = -1;
2018     char schFile[MAX_FILE_LEN];
2019     char mapFile[MAX_FILE_LEN];
2020     sprintf(schFile, "%s/db.chkpt.schema1", Conf::config.getDbFile());
2021     sprintf(mapFile, "%s/db.chkpt.map1", Conf::config.getDbFile());
2022     fp = fopen(schFile, "r");
2023     if (fp != NULL) {
2024         fclose(fp);
2025         int ret = unlink(schFile);
2026         if( ret != 0) {
2027             printError(ErrOS, "checkpoint: delete schema file failed");
2028             return ErrOS;
2029         }
2030     }
2031     fp = fopen(schFile, "w+");
2032     if (fp == NULL) {
2033             printError(ErrOS, "Unable to create schema file for chkpt.");
2034             return ErrOS;
2035     }
2036     fp1 = fopen(mapFile, "r");
2037     if (fp1 != NULL) {
2038         fclose(fp1);
2039         int ret = unlink(mapFile);
2040         if( ret != 0) {
2041             printError(ErrOS, "checkpoint: delete schema file failed");
2042             return ErrOS;
2043         }
2044     }
2045     fd = open(mapFile, O_WRONLY|O_CREAT, 0644);
2046     if (fd == -1) {
2047         printError(ErrOS, "checkpoint: Unable to create map file.");
2048         return ErrOS;
2049     }
2050     List tableList = getAllTableNames();
2051     ListIterator iter = tableList.getIterator();
2052     Identifier *elem = NULL;
2053     int count =0;
2054     while (iter.hasElement()) {
2055         elem = (Identifier*) iter.nextElement();
2056 //        if (TableConf::config.isTableCached(elem->name) == OK) continue;
2057         fprintf(fp, "CREATE TABLE %s (", elem->name);
2058         Table *table = openTable(elem->name);
2059         if (NULL == table) {
2060             printError(ErrSysInternal, "Unable to open table %s", elem->name);
2061             return ErrSysInternal;
2062         }
2063         void *chunk = NULL; void *tptr = NULL; void *vcchunk = NULL;
2064         CatalogTableTABLE cTable(systemDatabase_);
2065         rv = cTable.getChunkAndTblPtr(elem->name, chunk, tptr, vcchunk);
2066         struct Object obj;
2067         strcpy(obj.name, elem->name);
2068         obj.type = Tbl;
2069         obj.bucketChunk = NULL;
2070         obj.firstPage = ((Chunk *)chunk)->getFirstPage();
2071         obj.curPage = ((Chunk *)chunk)->getCurrentPage();
2072         void *buf = &obj;
2073         write(fd, buf, sizeof(obj));
2074         FieldInfo *info = new FieldInfo();
2075         List fNameList = table->getFieldNameList();
2076         ListIterator fNameIter = fNameList.getIterator();
2077         count++;
2078         bool firstField=true;
2079         char fieldName[IDENTIFIER_LENGTH];
2080         while (fNameIter.hasElement()) {
2081             elem = (Identifier*) fNameIter.nextElement();
2082             Table::getFieldNameAlone(elem->name, fieldName);
2083             rv = table->getFieldInfo(elem->name, info);
2084             if (rv !=OK)  {
2085                 printf("unable to retrive info for table %s\n", elem->name);
2086             }
2087             if (firstField) {
2088                 fprintf(fp, "%s %s ", fieldName, AllDataType::getSQLString(info->type));
2089                 firstField = false;
2090             } else
2091                 fprintf(fp, ", %s %s ", fieldName, AllDataType::getSQLString(info->type));
2092             if (info->type == typeString || info->type == typeVarchar ||
2093                                                       info->type == typeBinary)
2094                 fprintf(fp, "(%d)",info->length);
2095             if (info->isNull) fprintf(fp, " NOT NULL ");
2096             if (info->isDefault) fprintf(fp, " DEFAULT '%s' ", info->defaultValueBuf);
2097             if (info->isAutoIncrement) fprintf(fp, " AUTO_INCREMENT ");
2098         }
2099         fNameIter.reset();
2100         while (fNameIter.hasElement())
2101             delete ((FieldName *) fNameIter.nextElement());
2102         fNameList.reset();
2103
2104         fprintf(fp, ");\n");
2105         table->printSQLIndexString(fp, fd);
2106         delete info;
2107         closeTable(table);
2108     }
2109     ListIterator tIter = tableList.getIterator();
2110     tIter.reset();
2111     while (tIter.hasElement())
2112         delete ((FieldName *) tIter.nextElement());
2113     tableList.reset();
2114
2115     fclose(fp);
2116     close(fd);
2117     return OK;
2118 }
2119
2120 DbRetVal DatabaseManagerImpl::recover()
2121 {
2122     DbRetVal rv = OK;
2123     rv = sysDb()->recoverSystemDB();
2124     if (rv != OK) return rv;
2125     if (!Conf::config.useMmap())rv = db()->recoverUserDB();
2126     return rv;
2127 }
2128
2129 void DatabaseManagerImpl::sendSignal(int signal)
2130 {
2131     ThreadInfo* tInfo = sysDb()->getThreadInfo(0);
2132     for (int i=0; i < Conf::config.getMaxProcs(); i++)
2133     {
2134         if (tInfo->pid_ !=0) os::kill(tInfo->pid_, signal);
2135         tInfo++;
2136     }
2137 }