| 1 | /* ============================================================= |
| 2 | * SmallSQL : a free Java DBMS library for the Java(tm) platform |
| 3 | * ============================================================= |
| 4 | * |
| 5 | * (C) Copyright 2004-2006, by Volker Berlin. |
| 6 | * |
| 7 | * Project Info: http://www.smallsql.de/ |
| 8 | * |
| 9 | * This library is free software; you can redistribute it and/or modify it |
| 10 | * under the terms of the GNU Lesser General Public License as published by |
| 11 | * the Free Software Foundation; either version 2.1 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This library is distributed in the hope that it will be useful, but |
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 16 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
| 17 | * License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU Lesser General Public |
| 20 | * License along with this library; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, |
| 22 | * USA. |
| 23 | * |
| 24 | * [Java is a trademark or registered trademark of Sun Microsystems, Inc. |
| 25 | * in the United States and other countries.] |
| 26 | * |
| 27 | * --------------- |
| 28 | * ExpressionInSelect.java |
| 29 | * --------------- |
| 30 | * Author: Volker Berlin |
| 31 | * |
| 32 | * Created on 07.08.2004 |
| 33 | */ |
| 34 | package smallsql.database; |
| 35 | |
| 36 | |
| 37 | |
| 38 | /** |
| 39 | * @author Volker Berlin |
| 40 | */ |
| 41 | class ExpressionInSelect extends ExpressionArithmetic { |
| 42 | |
| 43 | final private CommandSelect cmdSel; |
| 44 | final private Index index = new Index(true); |
| 45 | final private SSConnection con; |
| 46 | |
| 47 | |
| 48 | ExpressionInSelect(SSConnection con, Expression left, CommandSelect cmdSel, int operation) { |
| 49 | super(left, (Expressions)null, operation); |
| 50 | this.cmdSel = cmdSel; |
| 51 | this.con = con; |
| 52 | } |
| 53 | |
| 54 | |
| 55 | private void loadInList() throws Exception{ |
| 56 | if(cmdSel.compile(con)){ |
| 57 | cmdSel.join.execute(); |
| 58 | if(cmdSel.columnExpressions.size() != 1) |
| 59 | throw Utils.createSQLException("Count of columns in subquery must be 1 and not "+cmdSel.columnExpressions.size()); |
| 60 | index.clear(); |
| 61 | while(cmdSel.next()){ |
| 62 | try{ |
| 63 | index.addValues(0, cmdSel.columnExpressions ); |
| 64 | }catch(Exception e){ |
| 65 | //double values can not add |
| 66 | } |
| 67 | } |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | boolean isInList() throws Exception{ |
| 72 | loadInList(); |
| 73 | return index.findRows( getParams(), null ) != null; |
| 74 | } |
| 75 | } |