package com.tesora.dve.queryplan;
/*
* #%L
* Tesora Inc.
* Database Virtualization Engine
* %%
* Copyright (C) 2011 - 2014 Tesora Inc.
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
* #L%
*/
import java.util.Collection;
import java.util.concurrent.Future;
import com.tesora.dve.common.catalog.PersistentDatabase;
import com.tesora.dve.common.catalog.StorageGroup;
import com.tesora.dve.common.catalog.UserTable;
import com.tesora.dve.common.logutil.ExecutionLogger;
import com.tesora.dve.db.DBEmptyTextResultConsumer;
import com.tesora.dve.db.DBResultConsumer;
import com.tesora.dve.exceptions.PEException;
import com.tesora.dve.server.connectionmanager.SSConnection;
import com.tesora.dve.server.messaging.SQLCommand;
import com.tesora.dve.server.messaging.WorkerExecuteRequest;
import com.tesora.dve.server.messaging.WorkerRequest;
import com.tesora.dve.worker.Worker;
import com.tesora.dve.worker.WorkerGroup;
import com.tesora.dve.worker.WorkerGroup.MappingSolution;
public class QueryStepCreateTempTableOperation extends QueryStepOperation {
private UserTable theTable;
public QueryStepCreateTempTableOperation(StorageGroup sg, UserTable toCreate) throws PEException {
super(sg);
theTable = toCreate;
}
@Override
public PersistentDatabase getContextDatabase() {
return theTable.getDatabase();
}
@Override
public void executeSelf(ExecutionState estate, WorkerGroup wg,
DBResultConsumer results) throws Throwable {
String sqlCommand = theTable.getCreateTableStmt(true);
SSConnection ssCon = estate.getConnection();
WorkerRequest req = new WorkerExecuteRequest(
ssCon.getNonTransactionalContext(), new SQLCommand(ssCon, sqlCommand))
.onDatabase(theTable.getDatabase()).forDDL();
ExecutionLogger logger = ssCon.getExecutionLogger().getNewLogger(
"CreateTempTable");
try {
WorkerRequest preCleanupReq = new WorkerExecuteRequest(ssCon.getNonTransactionalContext(),
UserTable.getDropTableStmt(ssCon, theTable.getName(), true))
.onDatabase(theTable.getDatabase()).forDDL();
wg.execute(MappingSolution.AllWorkers, preCleanupReq,DBEmptyTextResultConsumer.INSTANCE);
Collection<Future<Worker>> f = wg.submit(MappingSolution.AllWorkers, req,
DBEmptyTextResultConsumer.INSTANCE);
wg.addCleanupStep(new WorkerExecuteRequest(ssCon.getNonTransactionalContext(), UserTable.getDropTableStmt(ssCon,
theTable.getName(), false)).onDatabase(theTable.getDatabase()));
WorkerGroup.syncWorkers(f);
} finally {
logger.end();
}
}
}