/* This file is part of VoltDB.
* Copyright (C) 2008-2017 VoltDB Inc.
*
* 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 VoltDB. If not, see <http://www.gnu.org/licenses/>.
*/
package org.voltdb.compiler;
public enum DeterminismMode {
FASTER, // Pick the fastest plan without regard for determinism
SAFER; // Pick a fast plan that is more likely to be deterministic
// In practice, this means avoiding table scans, but could
// still fail on non-unique indexes
//SAFE // Not yet added, but could add an order-by all over the place
// if that made sense.
char toChar() {
if (this == FASTER) {
return 'F';
}
if (this == SAFER) {
return 'S';
}
throw new RuntimeException("This shouldn't happend in DeterminismMode.java");
}
static DeterminismMode fromChar(char c) {
if (c == 'F') {
return FASTER;
}
if (c == 'S') {
return SAFER;
}
return null;
}
static DeterminismMode fromStr(String str) {
if ((str == null) || (str.isEmpty())) {
return null;
}
return fromChar(str.toUpperCase().charAt(0));
}
}