/**
* Copyright (C) 2009-2013 FoundationDB, LLC
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* 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/>.
*/
package com.foundationdb.sql.embedded;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.foundationdb.qp.operator.API;
import com.foundationdb.qp.operator.Cursor;
import com.foundationdb.qp.operator.Operator;
import com.foundationdb.qp.operator.QueryBindings;
import com.foundationdb.qp.rowtype.Schema;
import com.foundationdb.sql.optimizer.plan.CostEstimate;
class ExecutableQueryOperatorStatement extends ExecutableOperatorStatement
{
private CostEstimate costEstimate;
private static final Logger LOG = LoggerFactory.getLogger(ExecutableQueryOperatorStatement.class);
protected ExecutableQueryOperatorStatement(Schema schema,
Operator resultOperator,
JDBCResultSetMetaData resultSetMetaData,
JDBCParameterMetaData parameterMetaData,
CostEstimate costEstimate) {
super(schema, resultOperator, resultSetMetaData, parameterMetaData);
this.costEstimate = costEstimate;
}
@Override
public ExecuteResults execute(EmbeddedQueryContext context, QueryBindings bindings) {
Cursor cursor = null;
try {
context.initStore(getSchema());
cursor = API.cursor(resultOperator, context, bindings);
cursor.openTopLevel();
ExecuteResults result = new ExecuteResults(cursor);
cursor = null;
return result;
} catch (RuntimeException e) {
LOG.error("caught error: {}", e.toString());
cursor = null;
throw e;
}
finally {
if (cursor != null) {
cursor.closeTopLevel();
}
}
}
@Override
public TransactionMode getTransactionMode() {
return TransactionMode.READ;
}
@Override
public TransactionAbortedMode getTransactionAbortedMode() {
return TransactionAbortedMode.NOT_ALLOWED;
}
@Override
public AISGenerationMode getAISGenerationMode() {
return AISGenerationMode.NOT_ALLOWED;
}
@Override
public long getEstimatedRowCount() {
if (costEstimate == null)
return -1;
else
return costEstimate.getRowCount();
}
}