/* * The MIT License (MIT) * * Copyright (c) 2014-2017 [email protected] * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.github.pagehelper.dialect.rowbounds; import com.github.pagehelper.dialect.AbstractRowBoundsDialect; import org.apache.ibatis.cache.CacheKey; import org.apache.ibatis.session.RowBounds; /** * oracle 基于 RowBounds 的分页 * * @author liuzh */ public class OracleRowBoundsDialect extends AbstractRowBoundsDialect { @Override public String getPageSql(String sql, RowBounds rowBounds, CacheKey pageKey) { int startRow = rowBounds.getOffset(); int endRow = rowBounds.getOffset() + rowBounds.getLimit(); StringBuilder sqlBuilder = new StringBuilder(sql.length() + 120); if (startRow > 0) { sqlBuilder.append("SELECT * FROM ( "); } if (endRow > 0) { sqlBuilder.append(" SELECT TMP_PAGE.*, ROWNUM ROW_ID FROM ( "); } sqlBuilder.append(sql); if (endRow > 0) { sqlBuilder.append(" ) TMP_PAGE WHERE ROWNUM <= "); sqlBuilder.append(endRow); pageKey.update(endRow); } if (startRow > 0) { sqlBuilder.append(" ) WHERE ROW_ID > "); sqlBuilder.append(startRow); pageKey.update(startRow); } return sqlBuilder.toString(); } }