54 lines
1.8 KiB
Java
54 lines
1.8 KiB
Java
/**
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* Copyright © 2012-2014 <a href="https://github.com/thinkgem/jeesite">JeeSite</a> All rights reserved.
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*/
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package com.nis.persistence.dialect;
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/**
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* Cluster方言的实现[神通数据库]
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*
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* @author poplar.yfyang
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* @version 1.0 2010-10-10 下午12:31
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* @since JDK 1.5
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*/
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public class ClusterDialect implements Dialect {
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@Override
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public String getLimitString(String sql, int offset, int limit) {
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return getLimitString(sql, offset, Integer.toString(offset),
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Integer.toString(limit));
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}
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public boolean supportsLimit() {
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return true;
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}
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/**
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* 将sql变成分页sql语句,提供将offset及limit使用占位符号(placeholder)替换.
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* <pre>
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* 如mysql
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* dialect.getLimitString("select * from user", 12, ":offset",0,":limit") 将返回
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* select * from user limit :offset,:limit
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* </pre>
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*
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* @param sql 实际SQL语句
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* @param offset 分页开始纪录条数
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* @param offsetPlaceholder 分页开始纪录条数－占位符号
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* @param limitPlaceholder 分页纪录条数占位符号
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* @return 包含占位符的分页sql
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*/
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public String getLimitString(String sql, int offset, String offsetPlaceholder, String limitPlaceholder) {
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StringBuilder stringBuilder = new StringBuilder(sql);
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if(stringBuilder.indexOf("limit") == -1 && stringBuilder.indexOf("LIMIT") == -1 ){
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stringBuilder.append(" limit ");
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stringBuilder.append(limitPlaceholder);
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stringBuilder.append(" offset ");
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stringBuilder.append(offsetPlaceholder);
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}
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System.out.println("cluster分页sql："+stringBuilder.toString());
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return stringBuilder.toString();
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}
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}
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