/* This file is part of VoltDB.
* Copyright (C) 2008-2017 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
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
// Put stored procedure
//
// Puts the given Key-Value pair
package oneshotkv.procedures;
import org.voltdb.*;
@ProcInfo
(
partitionInfo = "store.key:0"
, singlePartition = true
)
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);
}
}