org.tinygroup.tinysqldsl.extend.OracleSelect Maven / Gradle / Ivy
/**
* Copyright (c) 1997-2013, www.tinygroup.org ([email protected]).
*
* Licensed under the GPL, Version 3.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.gnu.org/licenses/gpl.html
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.tinygroup.tinysqldsl.extend;
import org.tinygroup.tinysqldsl.Select;
import org.tinygroup.tinysqldsl.base.Condition;
import org.tinygroup.tinysqldsl.base.Table;
import org.tinygroup.tinysqldsl.expression.OracleHierarchicalExpression;
import org.tinygroup.tinysqldsl.formitem.FromItemList;
import org.tinygroup.tinysqldsl.selectitem.AllColumns;
import org.tinygroup.tinysqldsl.selectitem.SelectItem;
/**
* oracle数据库相关的查询
* @author renhui
*
*/
public class OracleSelect extends Select {
public OracleSelect() {
super();
}
public static OracleSelect select(SelectItem... selectItems) {
OracleSelect select = new OracleSelect();
select.getPlainSelect().addSelectItems(selectItems);
return select;
}
public static OracleSelect selectFrom(Table... tables) {
OracleSelect select = new OracleSelect();
select.getPlainSelect().addSelectItems(new AllColumns());
select.getPlainSelect().setFromItem(new FromItemList(tables));
return select;
}
public OracleSelect into(Table... tables) {
plainSelect.addIntoTables(tables);
return this;
}
public OracleSelect page(int start, int limit) {
StringBuilder pagingSelect = new StringBuilder();
if (start == 0) {
start = 1;
}
pagingSelect
.append("select * from ( select row_.*, rownum db_rownum from ( ");
pagingSelect.append(sql());
pagingSelect.append(" ) row_ where rownum <=" + (start + limit - 1)
+ ") where db_rownum >=" + start);
this.stringBuilder = pagingSelect;
return this;
}
public OracleSelect startWith(Condition startWithCondition,
Condition connectCondition, boolean noCycle) {
OracleHierarchicalExpression expression = new OracleHierarchicalExpression();
expression.setStartExpression(startWithCondition.getExpression());
expression.setConnectExpression(connectCondition.getExpression());
expression.setNoCycle(noCycle);
plainSelect.setOracleHierarchical(expression);
return this;
}
@Override
protected Select newSelect() {
return new OracleSelect();
}
}