/* This file is part of VoltDB.
 * Copyright (C) 2008-2016 VoltDB Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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 */

// Put stored procedure
//
//   Puts the given Key-Value pair


package kvbench.procedures;

import org.voltdb.*;

public class Put extends VoltProcedure
{
    // Checks if key exists
    public final SQLStmt checkStmt = new SQLStmt("SELECT key FROM store WHERE key = ?;");

    // Updates a key/value pair
    public final SQLStmt updateStmt = new SQLStmt("UPDATE store SET value = ? WHERE key = ?;");

    // Inserts a key/value pair
    public final SQLStmt insertStmt = new SQLStmt("INSERT INTO store (key, value) VALUES (?, ?);");

    public VoltTable[] run(String key, byte[] value)
    {
        // Check whether the pair exists
        voltQueueSQL(checkStmt, key);

        // Insert new or update existing key depending on result
        if (voltExecuteSQL()[0].getRowCount() == 0)
            voltQueueSQL(insertStmt, key, value);
        else
            voltQueueSQL(updateStmt, value, key);
        return voltExecuteSQL(true);
    }
}
