/* // $Id: //guest/julian_hyde/saffron/src/main/saffron/Table.java#1 $ // 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; import openjava.mop.OJClass; import openjava.ptree.Expression; import saffron.opt.Cluster; import saffron.rel.Rel; /** * A <code>Table</code> is a relational dataset in a {@link Schema}. It has * methods to describe and implement itself. * * @author jhyde * @since 10 November, 2001 * @version $Id: //guest/julian_hyde/saffron/src/main/saffron/Table.java#1 $ **/ public interface Table { /** * Returns the {@link Schema} this table belongs to. **/ Schema getSchema(); /** * Describes the type of rows returned by this table. **/ OJClass getRowType(); /** * Returns an estimate of the number of rows in the table. **/ double getRowCount(); /** * Converts this table into a {@link saffron.rel.Rel}. Rules may later transform this * relational expression into other access methods for this table. * * @param cluster the cluster this Rel will belong to * @param schemaExp the parse tree of the expression which evaluates to a * schema object **/ Rel toRel(Cluster cluster, Expression schemaExp); } // End Table.java
# | Change | User | Description | Committed | |
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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. |