/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.facebook.presto.execution;
import com.facebook.presto.connector.ConnectorId;
import com.facebook.presto.metadata.Metadata;
import com.facebook.presto.security.AccessControl;
import com.facebook.presto.sql.analyzer.SemanticException;
import com.facebook.presto.sql.tree.Expression;
import com.facebook.presto.sql.tree.ResetSession;
import com.facebook.presto.transaction.TransactionManager;
import com.google.common.util.concurrent.ListenableFuture;
import java.util.List;
import static com.facebook.presto.sql.analyzer.SemanticErrorCode.INVALID_SESSION_PROPERTY;
import static com.facebook.presto.sql.analyzer.SemanticErrorCode.MISSING_CATALOG;
import static com.google.common.util.concurrent.Futures.immediateFuture;
public class ResetSessionTask
implements DataDefinitionTask<ResetSession>
{
@Override
public String getName()
{
return "RESET SESSION";
}
@Override
public ListenableFuture<?> execute(ResetSession statement, TransactionManager transactionManager, Metadata metadata, AccessControl accessControl, QueryStateMachine stateMachine, List<Expression> parameters)
{
List<String> parts = statement.getName().getParts();
if (parts.size() > 2) {
throw new SemanticException(INVALID_SESSION_PROPERTY, statement, "Invalid session property '%s'", statement.getName());
}
// validate the property name
if (parts.size() == 1) {
metadata.getSessionPropertyManager().getSystemSessionPropertyMetadata(parts.get(0))
.orElseThrow(() -> new SemanticException(INVALID_SESSION_PROPERTY, statement, "Session property %s does not exist", statement.getName()));
}
else {
ConnectorId connectorId = metadata.getCatalogHandle(stateMachine.getSession(), parts.get(0))
.orElseThrow(() -> new SemanticException(MISSING_CATALOG, statement, "Catalog %s does not exist", parts.get(0)));
metadata.getSessionPropertyManager().getConnectorSessionPropertyMetadata(connectorId, parts.get(1))
.orElseThrow(() -> new SemanticException(INVALID_SESSION_PROPERTY, statement, "Session property %s does not exist", statement.getName()));
}
stateMachine.addResetSessionProperties(statement.getName().toString());
return immediateFuture(null);
}
}