/* // $Id: //guest/julian_hyde/saffron/src/main/saffron/opt/Cluster.java#2 $ // Saffron preprocessor and data engine // Copyright (C) 2002 Julian Hyde <julian.hyde@mail.com> // // This library is free software; you can redistribute it and/or // modify it under the terms of the GNU Library General Public // License as published by the Free Software Foundation; either // version 2 of the License, or (at your option) any later version. // // This library 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 // Library General Public License for more details. // // You should have received a copy of the GNU Library General Public // License along with this library; if not, write to the // Free Software Foundation, Inc., 59 Temple Place - Suite 330, // Boston, MA 02111-1307, USA. // // See the COPYING file located in the top-level-directory of // the archive of this library for complete text of license. */ package saffron.opt; import openjava.mop.Environment; import openjava.ptree.Expression; import saffron.Planner; /** * A <code>Cluster</code> is a collection of {@link saffron.rel.Rel}ational expressions * which have the same environment. * * <p>See the comment against {@link saffron.rel.QueryInfo} on why you should * put fields in that class, not this one.</p> * * @author jhyde * @since 27 September, 2001 * @version $Id: //guest/julian_hyde/saffron/src/main/saffron/opt/Cluster.java#2 $ **/ public class Cluster { public Query query; public Environment env; private Expression originalExpression; Planner planner; public Cluster( Query query, Environment env, Expression originalExpression) { this.query = query; this.env = env; this.originalExpression = originalExpression; } public Expression getOriginalExpression() { return originalExpression; } } // End Cluster.java
# | Change | User | Description | Committed | |
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#3 | 1801 | Julian Hyde |
saffron: add ObjectSchema; rules can now be matched more than once; started to implement correlations in queries in from list. |
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#2 | 1474 | Julian Hyde |
saffron: Aggregations are working. Renamed 'aggregator' to 'aggregation'. |
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#1 | 1467 | Julian Hyde |
saffron: First saffron check-in; incorporate my changes to openjava. |