/*
* Copyright 2008 biaoping.yin
*
* Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
* 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 com.frameworkset.orm.adapter;
import java.sql.ResultSet;
import com.frameworkset.common.poolman.util.JDBCPoolMetaData;
import com.frameworkset.orm.platform.PlatformMssqlImpl;
/**
* This is used to connect to a MSSQL database. For now, this class
* simply extends the adaptor for Sybase. You can use one of several
* commercial JDBC drivers; the one I use is:
*
* i-net SPRINTA(tm) 2000 Driver Version 3.03 for MS SQL Server
* http://www.inetsoftware.de/
*
* @author <a href="mailto:gonzalo.diethelm@sonda.com">Gonzalo Diethelm</a>
* @version $Id: DBMSSQL.java,v 1.7 2005/01/31 19:43:55 tfischer Exp $
*/
public class DBMSSQL extends DBSybase
{
/**
* Empty constructor.
*/
protected DBMSSQL()
{
this.platform = new PlatformMssqlImpl();
}
/**
* This method is used to chek whether the database natively
* supports limiting the size of the resultset.
*
* @return True.
*/
public boolean supportsNativeLimit()
{
return false;
}
/**
* 数据库主键最大值的获取方法
*/
public String getIDMAXSql(String table_name,String table_id_name,String table_id_prefix,String type)
{
//SUBSTR(table_id_name,LENGTH(table_id_prefix))
String maxSql = "select max("+ table_id_name + ") from " + table_name;
if(type.equalsIgnoreCase("string") || type.equalsIgnoreCase("java.lang.string"))
{
if(table_id_prefix != null && !table_id_prefix.trim().equals(""))
{
maxSql = "select max(CAST(SUBSTRING(" + table_id_name + ",len(" + table_id_prefix + ") + 1) as bigint))) from " + table_name;
}
else
{
maxSql = "select max(CAST(" + table_id_name + " as bigint)) from " + table_name;
}
}
return maxSql;
}
public int getCusorType(String dbdriver)
{
if(dbdriver == null || dbdriver.equals("com.microsoft.jdbc.sqlserver.SQLServerDriver"))
return super.getCusorType(dbdriver);
else
return ResultSet.CONCUR_UPDATABLE;
}
// public int getSCROLLType(String dbdriver)
// {
//
// if(dbdriver == null || dbdriver.equals("com.microsoft.jdbc.sqlserver.SQLServerDriver"))
// return super.getSCROLLType(dbdriver);
// else
// return ResultSet.;
// }
public String getSchema(JDBCPoolMetaData info)
{
return DB.NULL_SCHEMA;
}
/**
* 获取指定数据的分页数据sql语句
* @param sql
* @return
*/
public PagineSql getDBPagineSql(String sql, long offset, int maxsize,boolean prepared,String orderby) {
// return new StringBuilder(sql).append(" limit ").append(offset).append(",").append(maxsize).toString();
StringBuilder newsql = new StringBuilder();
if(prepared)
{
newsql.append("SELECT t.* FROM (SELECT res.* ,row_number() over(").append(orderby).append(") row_number_ FROM (").append(sql)
.append(") res) t where t.row_number_ <= ? and t.row_number_ >= ?");
/**
* StringBuilder ret = null;
if(prepared)
ret = new StringBuilder().append("select ss1.* from (select tt1.*,rownum rowno_ from (").append(sql).append(
") tt1 where rownum <= ?) ss1 where ss1.rowno_ >= ?");
else
ret = new StringBuilder("select ss1.* from (select tt1.*,rownum rowno_ from (").append(sql).append(
") tt1 where rownum <= ").append((offset + maxsize)).append(") ss1 where ss1.rowno_ >= ").append(
(offset + 1));
return new PagineSql(ret.toString(),offset + maxsize,offset + 1,offset, maxsize, prepared);
*/
return new PagineSql(newsql.toString(),offset + maxsize,offset + 1,offset, maxsize, prepared).setRebuilded(true);
}
else
{
newsql.append("SELECT t.* FROM (SELECT res.* ,row_number() over(").append(orderby).append(") row_number_ FROM (").append(sql)
.append(") res) t where t.row_number_ <= ").append(offset + maxsize).append(" and t.row_number_ >= ").append(offset + 1).append("");
return new PagineSql(newsql.toString(),offset + maxsize,offset + 1,offset, maxsize, prepared).setRebuilded(true);
}
}
public String getStringPagineSql(String sql,String orderby)
{
StringBuilder newsql = new StringBuilder();
newsql.append("SELECT t.* FROM (SELECT res.* ,row_number() over(").append(orderby).append(") row_number_ FROM (").append(sql)
.append(") res) t where t.row_number_ <= ? and t.row_number_ >= ?");
return newsql.toString();
}
public String getStringPagineSql(String schema,String tablename,String pkname ,String columns,String orderby)
{
StringBuilder newsql = new StringBuilder();
newsql.append("SELECT t.* FROM (SELECT res.* ,row_number() over(").append(orderby).append(") row_number_ FROM (").append("SELECT ");
if(columns != null && ! columns.equals(""))
{
newsql.append( columns);
}
else
newsql.append("* ");
newsql.append(" from ");
if(schema != null && !schema.equals(""))
newsql.append(schema).append(".");
newsql.append( tablename)
.append(") res) t where t.row_number_ <= ? and t.row_number_ >= ?");
return newsql.toString();
}
}