DropTableProcessor::DDLResult DropTableProcessor::processPackage(ddlpackage::DropTableStatement& dropTableStmt)
{
SUMMARY_INFO("DropTableProcessor::processPackage");
DDLResult result;
result.result = NO_ERROR;
std::string err;
VERBOSE_INFO(dropTableStmt);
// Commit current transaction.
// all DDL statements cause an implicit commit
VERBOSE_INFO("Getting current txnID");
ByteStream::byte rc = 0;
BRM::TxnID txnID;
txnID.id= fTxnid.id;
txnID.valid= fTxnid.valid;
int rc1 = 0;
rc1= fDbrm->isReadWrite();
if (rc1 != 0 )
{
Message::Args args;
Message message(9);
args.add("Unable to execute the statement due to DBRM is read only");
message.format(args);
result.result = DROP_ERROR;
result.message = message;
fSessionManager.rolledback(txnID);
return result;
}
string stmt = dropTableStmt.fSql + "|" + dropTableStmt.fTableName->fSchema +"|";
SQLLogger logger(stmt, fDDLLoggingId, dropTableStmt.fSessionID, txnID.id);
std::vector <CalpontSystemCatalog::OID> oidList;
CalpontSystemCatalog::RIDList tableColRidList;
CalpontSystemCatalog::DictOIDList dictOIDList;
execplan::CalpontSystemCatalog::ROPair roPair;
std::string errorMsg;
ByteStream bytestream;
uint64_t uniqueId = 0;
//Bug 5070. Added exception handling
try {
uniqueId = fDbrm->getUnique64();
}
catch (std::exception& ex)
{
Message::Args args;
Message message(9);
args.add(ex.what());
message.format(args);
result.result = DROP_ERROR;
result.message = message;
fSessionManager.rolledback(txnID);
return result;
}
catch ( ... )
{
Message::Args args;
Message message(9);
args.add("Unknown error occured while getting unique number.");
message.format(args);
result.result = DROP_ERROR;
result.message = message;
fSessionManager.rolledback(txnID);
return result;
}
fWEClient->addQueue(uniqueId);
int pmNum = 1;
boost::shared_ptr<messageqcpp::ByteStream> bsIn;
uint64_t tableLockId = 0;
OamCache* oamcache = OamCache::makeOamCache();
std::vector<int> moduleIds = oamcache->getModuleIds();
try
{
//check table lock
CalpontSystemCatalog *systemCatalogPtr = CalpontSystemCatalog::makeCalpontSystemCatalog(dropTableStmt.fSessionID);
systemCatalogPtr->identity(CalpontSystemCatalog::EC);
systemCatalogPtr->sessionID(dropTableStmt.fSessionID);
CalpontSystemCatalog::TableName tableName;
tableName.schema = dropTableStmt.fTableName->fSchema;
tableName.table = dropTableStmt.fTableName->fName;
roPair = systemCatalogPtr->tableRID( tableName );
u_int32_t processID = ::getpid();
int32_t txnid = txnID.id;
int32_t sessionId = dropTableStmt.fSessionID;
std::string processName("DDLProc");
int i = 0;
std::vector<uint> pms;
for (unsigned i=0; i < moduleIds.size(); i++)
{
pms.push_back((uint)moduleIds[i]);
}
try {
tableLockId = fDbrm->getTableLock(pms, roPair.objnum, &processName, &processID, &sessionId, &txnid, BRM::LOADING );
}
catch (std::exception&)
{
throw std::runtime_error(IDBErrorInfo::instance()->errorMsg(ERR_HARD_FAILURE));
}
if ( tableLockId == 0 )
{
int waitPeriod = 10;
int sleepTime = 100; // sleep 100 milliseconds between checks
int numTries = 10; // try 10 times per second
waitPeriod = WriteEngine::Config::getWaitPeriod();
numTries = waitPeriod * 10;
struct timespec rm_ts;
rm_ts.tv_sec = sleepTime/1000;
rm_ts.tv_nsec = sleepTime%1000 *1000000;
for (; i < numTries; i++)
{
#ifdef _MSC_VER
Sleep(rm_ts.tv_sec * 1000);
#else
struct timespec abs_ts;
do
{
abs_ts.tv_sec = rm_ts.tv_sec;
abs_ts.tv_nsec = rm_ts.tv_nsec;
}
while(nanosleep(&abs_ts,&rm_ts) < 0);
#endif
try {
processID = ::getpid();
txnid = txnID.id;
sessionId = dropTableStmt.fSessionID;;
processName = "DDLProc";
tableLockId = fDbrm->getTableLock(pms, roPair.objnum, &processName, &processID, &sessionId, &txnid, BRM::LOADING );
}
catch (std::exception&)
{
throw std::runtime_error(IDBErrorInfo::instance()->errorMsg(ERR_HARD_FAILURE));
}
if (tableLockId > 0)
break;
}
if (i >= numTries) //error out
{
Message::Args args;
args.add(processName);
args.add((uint64_t)processID);
args.add(sessionId);
throw std::runtime_error(IDBErrorInfo::instance()->errorMsg(ERR_TABLE_LOCKED,args));
}
}
// 1. Get the OIDs for the columns
// 2. Get the OIDs for the dictionaries
// 3. Save the OIDs to a log file
// 4. Remove the Table from SYSTABLE
// 5. Remove the columns from SYSCOLUMN
// 6. Commit the changes made to systables
// 7. Flush PrimProc Cache
// 8. Update extent map
// 9. Remove the column and dictionary files
// 10.Return the OIDs
CalpontSystemCatalog::TableName userTableName;
userTableName.schema = dropTableStmt.fTableName->fSchema;
userTableName.table = dropTableStmt.fTableName->fName;
tableColRidList = systemCatalogPtr->columnRIDs( userTableName );
dictOIDList = systemCatalogPtr->dictOIDs( userTableName );
Oam oam;
//Save qualified tablename, all column, dictionary OIDs, and transaction ID into a file in ASCII format
for ( unsigned i=0; i < tableColRidList.size(); i++ )
{
if ( tableColRidList[i].objnum > 3000 )
oidList.push_back( tableColRidList[i].objnum );
}
for ( unsigned i=0; i < dictOIDList.size(); i++ )
{
if ( dictOIDList[i].dictOID > 3000 )
oidList.push_back( dictOIDList[i].dictOID );
}
//get a unique number
VERBOSE_INFO("Removing the SYSTABLE meta data");
#ifdef IDB_DDL_DEBUG
cout << "Removing the SYSTABLEs meta data" << endl;
#endif
bytestream << (ByteStream::byte)WE_SVR_DELETE_SYSTABLES;
bytestream << uniqueId;
bytestream << (u_int32_t) dropTableStmt.fSessionID;
bytestream << (u_int32_t)txnID.id;
bytestream << dropTableStmt.fTableName->fSchema;
bytestream << dropTableStmt.fTableName->fName;
//Find out where systable is
BRM::OID_t sysOid = 1001;
ByteStream::byte rc = 0;
u_int16_t dbRoot;
rc = fDbrm->getSysCatDBRoot(sysOid, dbRoot);
if (rc != 0)
{
result.result =(ResultCode) rc;
Message::Args args;
Message message(9);
args.add("Error while calling getSysCatDBRoot");
args.add(errorMsg);
result.message = message;
//release transaction
fSessionManager.rolledback(txnID);
return result;
}
boost::shared_ptr<std::map<int, int> > dbRootPMMap = oamcache->getDBRootToPMMap();
pmNum = (*dbRootPMMap)[dbRoot];
try
{
//cout << "deleting systable entries with txnid " << txnID.id << endl;
fWEClient->write(bytestream, (uint)pmNum);
#ifdef IDB_DDL_DEBUG
cout << "Drop table sending WE_SVR_DELETE_SYSTABLES to pm " << pmNum << endl;
#endif
while (1)
{
bsIn.reset(new ByteStream());
fWEClient->read(uniqueId, bsIn);
if ( bsIn->length() == 0 ) //read error
{
rc = NETWORK_ERROR;
errorMsg = "Lost connection to Write Engine Server while updating SYSTABLES";
break;
}
else {
*bsIn >> rc;
if (rc != 0) {
*bsIn >> errorMsg;
}
break;
}
}
}
catch (runtime_error& ex) //write error
{
#ifdef IDB_DDL_DEBUG
cout << "Drop table got exception" << endl;
#endif
rc = NETWORK_ERROR;
errorMsg = ex.what();
}
catch (...)
{
rc = NETWORK_ERROR;
#ifdef IDB_DDL_DEBUG
cout << "Drop table got unknown exception" << endl;
#endif
}
if (rc != 0)
{
Message::Args args;
Message message(9);
args.add("Error in dropping table from systables.");
args.add(errorMsg);
message.format(args);
result.result = (ResultCode)rc;
result.message = message;
//release table lock and session
fSessionManager.rolledback(txnID);
(void)fDbrm->releaseTableLock(tableLockId);
fWEClient->removeQueue(uniqueId);
return result;
}
rc = commitTransaction(uniqueId, txnID);
//cout << "commiting transaction " << txnID.id << " and valid is " << txnID.valid << endl;
if (rc != 0)
fSessionManager.rolledback(txnID);
else
fSessionManager.committed(txnID);
if (rc != 0)
{
Message::Args args;
Message message(9);
ostringstream oss;
oss << " Commit failed with error code " << rc;
args.add(oss.str());
fSessionManager.rolledback(txnID);
(void)fDbrm->releaseTableLock(tableLockId);
message.format(args);
result.result = (ResultCode)rc;
result.message = message;
fWEClient->removeQueue(uniqueId);
return result;
}
// Log the DDL statement
logDDL(dropTableStmt.fSessionID, txnID.id, dropTableStmt.fSql, dropTableStmt.fOwner);
}
catch (std::exception& ex)
{
result.result = DROP_ERROR;
Message::Args args;
Message message(9);
args.add("Drop table failed due to ");
args.add(ex.what());
fSessionManager.rolledback(txnID);
try {
(void)fDbrm->releaseTableLock(tableLockId);
}
catch (std::exception&)
{
args.add(IDBErrorInfo::instance()->errorMsg(ERR_HARD_FAILURE));
}
message.format( args );
result.message = message;
fWEClient->removeQueue(uniqueId);
return result;
}
catch (...)
{
result.result = DROP_ERROR;
errorMsg = "Error in getting information from system catalog or from dbrm.";
Message::Args args;
Message message(9);
args.add("Drop table failed due to ");
args.add(errorMsg);
fSessionManager.rolledback(txnID);
try {
(void)fDbrm->releaseTableLock(tableLockId);
}
catch (std::exception&)
{
args.add(IDBErrorInfo::instance()->errorMsg(ERR_HARD_FAILURE));
}
message.format( args );
result.message = message;
fWEClient->removeQueue(uniqueId);
return result;
}
try {
(void)fDbrm->releaseTableLock(tableLockId);
}
catch (std::exception&)
{
result.result = DROP_ERROR;
Message::Args args;
Message message(9);
args.add("Drop table failed due to ");
args.add(IDBErrorInfo::instance()->errorMsg(ERR_HARD_FAILURE));
fSessionManager.rolledback(txnID);
message.format( args );
result.message = message;
fWEClient->removeQueue(uniqueId);
return result;
}
//Save the oids to a file
try {
createWriteDropLogFile( roPair.objnum, uniqueId, oidList );
}
catch (std::exception& ex)
{
result.result = WARNING;
Message::Args args;
Message message(9);
args.add("Drop table failed due to ");
args.add(ex.what());
message.format(args);
result.message = message;
fSessionManager.rolledback(txnID);
fWEClient->removeQueue(uniqueId);
return result;
}
// Bug 4208 Drop the PrimProcFDCache before droping the column files
// FOr Windows, this ensures (most likely) that the column files have
// no open handles to hinder the deletion of the files.
rc = cacheutils::dropPrimProcFdCache();
//Drop files
bytestream.restart();
bytestream << (ByteStream::byte)WE_SVR_WRITE_DROPFILES;
bytestream << uniqueId;
bytestream << (uint32_t) oidList.size();
for (unsigned i=0; i < oidList.size(); i++)
{
bytestream << (uint32_t) oidList[i];
}
#ifdef IDB_DDL_DEBUG
cout << "Drop table removing column files" << endl;
#endif
uint msgRecived = 0;
try {
fWEClient->write_to_all(bytestream);
bsIn.reset(new ByteStream());
ByteStream::byte tmp8;
while (1)
{
if (msgRecived == fWEClient->getPmCount())
break;
fWEClient->read(uniqueId, bsIn);
if ( bsIn->length() == 0 ) //read error
{
rc = NETWORK_ERROR;
fWEClient->removeQueue(uniqueId);
break;
}
else {
*bsIn >> tmp8;
rc = tmp8;
if (rc != 0) {
*bsIn >> errorMsg;
fWEClient->removeQueue(uniqueId);
break;
}
else
msgRecived++;
}
}
DropPartitionProcessor::DDLResult DropPartitionProcessor::processPackage(ddlpackage::DropPartitionStatement& dropPartitionStmt)
{
SUMMARY_INFO("DropPartitionProcessor::processPackage");
DDLResult result;
result.result = NO_ERROR;
std::string err;
VERBOSE_INFO(dropPartitionStmt);
// Commit current transaction.
// all DDL statements cause an implicit commit
VERBOSE_INFO("Getting current txnID");
int rc = 0;
rc = fDbrm->isReadWrite();
BRM::TxnID txnID;
txnID.id= fTxnid.id;
txnID.valid= fTxnid.valid;
if (rc != 0 )
{
logging::Message::Args args;
logging::Message message(9);
args.add("Unable to execute the statement due to DBRM is read only");
message.format(args);
result.result = DROP_ERROR;
result.message = message;
fSessionManager.rolledback(txnID);
return result;
}
std::vector <CalpontSystemCatalog::OID> oidList;
CalpontSystemCatalog::RIDList tableColRidList;
CalpontSystemCatalog::DictOIDList dictOIDList;
execplan::CalpontSystemCatalog::ROPair roPair;
uint32_t processID = 0;
u_int64_t uniqueID = 0;
uint32_t sessionID = dropPartitionStmt.fSessionID;
std::string processName("DDLProc");
u_int64_t uniqueId = 0;
//Bug 5070. Added exception handling
try {
uniqueId = fDbrm->getUnique64();
}
catch (std::exception& ex)
{
logging::Message::Args args;
logging::Message message(9);
args.add(ex.what());
message.format(args);
result.result = ALTER_ERROR;
result.message = message;
fSessionManager.rolledback(txnID);
return result;
}
catch ( ... )
{
logging::Message::Args args;
logging::Message message(9);
args.add("Unknown error occured while getting unique number.");
message.format(args);
result.result = ALTER_ERROR;
result.message = message;
fSessionManager.rolledback(txnID);
return result;
}
string stmt = dropPartitionStmt.fSql + "|" + dropPartitionStmt.fTableName->fSchema +"|";
SQLLogger logger(stmt, fDDLLoggingId, sessionID, txnID.id);
try
{
//check table lock
CalpontSystemCatalog *systemCatalogPtr = CalpontSystemCatalog::makeCalpontSystemCatalog(dropPartitionStmt.fSessionID);
systemCatalogPtr->identity(CalpontSystemCatalog::EC);
systemCatalogPtr->sessionID(dropPartitionStmt.fSessionID);
CalpontSystemCatalog::TableName tableName;
tableName.schema = dropPartitionStmt.fTableName->fSchema;
tableName.table = dropPartitionStmt.fTableName->fName;
roPair = systemCatalogPtr->tableRID( tableName );
//@Bug 3054 check for system catalog
if ( roPair.objnum < 3000 )
{
throw std::runtime_error("Drop partition cannot be operated on Calpont system catalog.");
}
int i = 0;
processID = ::getpid();
oam::OamCache * oamcache = OamCache::makeOamCache();
std::vector<int> pmList = oamcache->getModuleIds();
std::vector<uint> pms;
for (unsigned i=0; i < pmList.size(); i++)
{
pms.push_back((uint)pmList[i]);
}
try {
uniqueID = fDbrm->getTableLock(pms, roPair.objnum, &processName, &processID, (int32_t*)&sessionID, (int32_t*)&txnID.id, BRM::LOADING );
}
catch (std::exception&)
{
result.result = DROP_ERROR;
result.message = IDBErrorInfo::instance()->errorMsg(ERR_HARD_FAILURE);
// no need to release lock. dbrm un-hold the lock
fSessionManager.rolledback(txnID);
return result;
}
if ( uniqueID == 0 )
{
int waitPeriod = 10;
int sleepTime = 100; // sleep 100 milliseconds between checks
int numTries = 10; // try 10 times per second
waitPeriod = Config::getWaitPeriod();
numTries = waitPeriod * 10;
struct timespec rm_ts;
rm_ts.tv_sec = sleepTime/1000;
rm_ts.tv_nsec = sleepTime%1000 *1000000;
for (; i < numTries; i++)
{
#ifdef _MSC_VER
Sleep(rm_ts.tv_sec * 1000);
#else
struct timespec abs_ts;
do
{
abs_ts.tv_sec = rm_ts.tv_sec;
abs_ts.tv_nsec = rm_ts.tv_nsec;
}
while(nanosleep(&abs_ts,&rm_ts) < 0);
#endif
// reset
sessionID = dropPartitionStmt.fSessionID;
txnID.id= fTxnid.id;
txnID.valid= fTxnid.valid;
processID = ::getpid();
processName = "DDLProc";
try
{
uniqueID = fDbrm->getTableLock(pms, roPair.objnum, &processName, &processID, (int32_t*)&sessionID, (int32_t*)&txnID.id, BRM::LOADING );
}
catch (std::exception&)
{
result.result = DROP_ERROR;
result.message = IDBErrorInfo::instance()->errorMsg(ERR_HARD_FAILURE);
fSessionManager.rolledback(txnID);
return result;
}
if (uniqueID > 0)
break;
}
if (i >= numTries) //error out
{
result.result = DROP_ERROR;
logging::Message::Args args;
args.add(processName);
args.add((uint64_t)processID);
args.add((uint64_t)sessionID);
result.message = Message(IDBErrorInfo::instance()->errorMsg(ERR_TABLE_LOCKED,args));
fSessionManager.rolledback(txnID);
return result;
}
}
// 1. Get the OIDs for the columns
// 2. Get the OIDs for the dictionaries
// 3. Save the OIDs to a log file
// 4. Disable the extents from extentmap for the partition
// 5. Remove the column and dictionary files for the partition
// 6. Flush PrimProc Cache
// 7. Remove the extents from extentmap for the partition
CalpontSystemCatalog::TableName userTableName;
userTableName.schema = dropPartitionStmt.fTableName->fSchema;
userTableName.table = dropPartitionStmt.fTableName->fName;
tableColRidList = systemCatalogPtr->columnRIDs( userTableName );
dictOIDList = systemCatalogPtr->dictOIDs( userTableName );
//Save qualified tablename, all column, dictionary OIDs, and transaction ID into a file in ASCII format
for ( unsigned i=0; i < tableColRidList.size(); i++ )
{
if ( tableColRidList[i].objnum > 3000 )
oidList.push_back( tableColRidList[i].objnum );
}
for ( unsigned i=0; i < dictOIDList.size(); i++ )
{
if ( dictOIDList[i].dictOID > 3000 )
oidList.push_back( dictOIDList[i].dictOID );
}
//Mark the partition disabled from extent map
string emsg;
rc = fDbrm->markPartitionForDeletion( oidList, dropPartitionStmt.fPartitions, emsg);
if (rc != 0 && rc !=BRM::ERR_PARTITION_DISABLED &&
rc != BRM::ERR_INVALID_OP_LAST_PARTITION &&
rc != BRM::ERR_NOT_EXIST_PARTITION)
{
throw std::runtime_error(emsg);
}
set<BRM::LogicalPartition> markedPartitions;
set<BRM::LogicalPartition> outOfServicePartitions;
// only log partitions that are successfully marked disabled.
rc = fDbrm->getOutOfServicePartitions(oidList[0], outOfServicePartitions);
if (rc != 0)
{
string errorMsg;
BRM::errString(rc, errorMsg);
ostringstream oss;
oss << "getOutOfServicePartitions failed due to " << errorMsg;
throw std::runtime_error(oss.str());
}
set<BRM::LogicalPartition>::iterator it;
for (it = dropPartitionStmt.fPartitions.begin(); it != dropPartitionStmt.fPartitions.end(); ++it)
{
if (outOfServicePartitions.find(*it) != outOfServicePartitions.end())
markedPartitions.insert(*it);
}
//Save the oids to a file
createWritePartitionLogFile( roPair.objnum, markedPartitions, oidList, uniqueId);
VERBOSE_INFO("Removing files");
removePartitionFiles( oidList, markedPartitions, uniqueId );
//Flush PrimProc cache for those lbids
rc = cacheutils::flushPartition( oidList, markedPartitions );
//Remove the partition from extent map
emsg.clear();
rc = fDbrm->deletePartition( oidList, dropPartitionStmt.fPartitions, emsg);
if ( rc != 0 )
throw std::runtime_error(emsg);
}
catch (exception& ex)
{
cerr << "DropPartitionProcessor::processPackage: " << ex.what() << endl;
logging::Message::Args args;
logging::Message message(ex.what());
if (rc == BRM::ERR_TABLE_NOT_LOCKED)
result.result = USER_ERROR;
else if (rc == BRM::ERR_NOT_EXIST_PARTITION || rc == BRM::ERR_INVALID_OP_LAST_PARTITION)
result.result = PARTITION_WARNING;
else if (rc == BRM::ERR_NO_PARTITION_PERFORMED)
result.result = WARN_NO_PARTITION;
else
result.result = DROP_ERROR;
result.message = message;
try {
fDbrm->releaseTableLock(uniqueID);
} catch (std::exception&)
{
result.result = DROP_ERROR;
result.message = IDBErrorInfo::instance()->errorMsg(ERR_HARD_FAILURE);
}
fSessionManager.rolledback(txnID);
return result;
}
catch (...)
{
cerr << "DropPartitionProcessor::processPackage: caught unknown exception!" << endl;
logging::Message::Args args;
logging::Message message(1);
args.add("Drop partition failed: ");
args.add( "encountered unkown exception" );
args.add("");
args.add("");
message.format( args );
result.result = DROP_ERROR;
result.message = message;
try {
fDbrm->releaseTableLock(uniqueID);
} catch (std::exception&)
{
result.result = DROP_ERROR;
result.message = IDBErrorInfo::instance()->errorMsg(ERR_HARD_FAILURE);
}
fSessionManager.rolledback(txnID);
return result;
}
// Log the DDL statement
logging::logDDL(dropPartitionStmt.fSessionID, txnID.id, dropPartitionStmt.fSql, dropPartitionStmt.fOwner);
//Remove the log file
//release the transaction
try {
fDbrm->releaseTableLock(uniqueID);
deleteLogFile(DROPPART_LOG, roPair.objnum, uniqueId);
} catch (std::exception&)
{
result.result = DROP_ERROR;
result.message = IDBErrorInfo::instance()->errorMsg(ERR_HARD_FAILURE);
fSessionManager.rolledback(txnID);
return result;
}
fSessionManager.committed(txnID);
return result;
}