/******************************************************************************
 *  Copyright 2015 by OLTPBenchmark Project                                   *
 *                                                                            *
 *  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.oltpbenchmark.benchmarks.linkbench.procedures;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

import org.apache.log4j.Logger;

import com.oltpbenchmark.api.Procedure;
import com.oltpbenchmark.api.SQLStmt;

public class DeleteNode extends Procedure{

    private static final Logger LOG = Logger.getLogger(DeleteNode.class);

    private PreparedStatement stmt = null;
    
    public final SQLStmt deleteStmt = new SQLStmt(
            "DELETE FROM nodetable " +
            "WHERE id= ? and type = ?"
    );

    public boolean run(Connection conn, int type, long id) throws SQLException {
        if (LOG.isDebugEnabled()) {
            LOG.debug("deleteNode : " + id + "." + type);
        }
        if(stmt == null)
          stmt = this.getPreparedStatement(conn, deleteStmt);   
        stmt.setLong(1, id); 
        stmt.setInt(2, type); 
        int rows = stmt.executeUpdate();
        conn.commit();
        if (rows == 0) {
            return false;
        } else if (rows == 1) {
            return true;
        } else {
            throw new SQLException(rows + " rows modified on delete: should delete " +
            "at most one");
        }
    }

}
