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不知道是自己對hibernate不了解,用的不對, 還是db2版本問題, 以前的一個項目用到db2, hibernate, 以為hibernate已經幫我們做好分頁的一切事情,只要用就行了, 代碼大概如下: 
  ????/**?*//**
 ?????*?設置分頁,?pageNo或pageList<=0時返回所有記錄
?????*?
?????*?@param?pageNo
?????*??????????頁數,?從1開始,?<=0時返回所有記錄
?????*?@param?pageList
?????*??????????每頁記錄數,?<=0時返回所有記錄
?????*?@param?query
 ?????*/
????public?static?void?pagination(?int?pageNo,?int?pageList,?Query?query?)
???? {
????????if?(?pageList?>?0?&&?pageNo?>?0?)
  ????????{
????????????query.setMaxResults(?pageList?);
????????????int?beginIndex?=?(pageNo?-?1)?*?pageList;
????????????query.setFirstResult(?beginIndex?);
 ????????}
????}
????/**?*//**
?????*?設置分頁,?pageNo或pageList<=0時返回所有記錄
?????*?
?????*?@param?pageNo
?????*??????????頁數,?從1開始,?<=0時返回所有記錄
?????*?@param?pageList
?????*??????????每頁記錄數,?<=0時返回所有記錄
?????*?@param?criteria
?????*/
????public?static?void?pagination(?int?pageNo,?int?pageList,?Criteria?criteria?)
????{
????????if?(?pageList?>?0?&&?pageNo?>?0?)
????????{
????????????criteria.setMaxResults(?pageList?);
????????????int?beginIndex?=?(pageNo?-?1)?*?pageList;
????????????criteria.setFirstResult(?beginIndex?);
????????}
????}?一開始, 在hibernate.properties的配置: ????hibernate.dialect?org.hibernate.dialect.DB2Dialect
????hibernate.connection.driver_class?COM.ibm.db2.jdbc.net.DB2Driver 一運行就拋出異常, 改成: ????hibernate.dialect?org.hibernate.dialect.DB2400Dialect
????hibernate.connection.driver_class?COM.ibm.db2.jdbc.net.DB2Driver 居然ok了, 大家都很高興, 以為什么都解決了, 也運行了一段時間,感覺有時候性能很差. ?后來, 在有分頁的地方一頁一頁的點下去, 點到40頁左右(每頁15條記錄), 頁面就卡住了, 檢查生成的sql語句, 發現是這樣的sql: ?
select?*?from?T?fetch?first?600?rows?only ?我想fetch first 600 rows only大概就是頁面卡住的原因了 ? ?再看org.hibernate.dialect.DB2Dialect的源碼, 發現數據庫拋出異常是因為: ?1. DB2Dialect生成的sql有兩個order by, 應該只保留over()里面的order by ?2. 當sql含有select distinct的時候, 要替換表別名為row_, 替換字段名為hibernate生成的字段名別名 ? ?把org.hibernate.dialect.DB2Dialect進行修改后, 目前運行還沒有發現什么問題. ? ?db2的版本好像7.x, 是不是版本太低, 或jdbc的版本問題呢, 也許hibernate的org.hibernate.dialect.DB2Dialect是沒有問題的, 呵呵. ?各位老大有沒有這方面的經驗, 有更好的解決方法請回復, 非常感謝! ? ?修改的DB2Dialect代碼如下:
import?java.sql.CallableStatement;
import?java.sql.ResultSet;
import?java.sql.SQLException;
import?java.sql.Types;
import?org.apache.log4j.Logger;
import?org.hibernate.Hibernate;
import?org.hibernate.cfg.Environment;
import?org.hibernate.dialect.Dialect;
import?org.hibernate.dialect.function.NoArgSQLFunction;
import?org.hibernate.dialect.function.SQLFunctionTemplate;
import?org.hibernate.dialect.function.StandardSQLFunction;
import?org.hibernate.dialect.function.VarArgsSQLFunction;
import?org.hibernate.dialect.function.AnsiTrimEmulationFunction;
/**?*//**
?*?An?SQL?dialect?for?DB2.
?*?
?*?@author?Gavin?King
?*/
public?class?DB2Dialect
????????extends?Dialect
{
????private?static?final?Logger?log?=?Logger.getLogger(?DB2Dialect.class?);
????public?DB2Dialect()
????{
????????super();
????????registerColumnType(?Types.BIT,?"smallint"?);
????????registerColumnType(?Types.BIGINT,?"bigint"?);
????????registerColumnType(?Types.SMALLINT,?"smallint"?);
????????registerColumnType(?Types.TINYINT,?"smallint"?);
????????registerColumnType(?Types.INTEGER,?"integer"?);
????????registerColumnType(?Types.CHAR,?"char(1)"?);
????????registerColumnType(?Types.VARCHAR,?"varchar($l)"?);
????????registerColumnType(?Types.FLOAT,?"float"?);
????????registerColumnType(?Types.DOUBLE,?"double"?);
????????registerColumnType(?Types.DATE,?"date"?);
????????registerColumnType(?Types.TIME,?"time"?);
????????registerColumnType(?Types.TIMESTAMP,?"timestamp"?);
????????registerColumnType(?Types.VARBINARY,?"varchar($l)?for?bit?data"?);
????????registerColumnType(?Types.NUMERIC,?"numeric($p,$s)"?);
????????registerColumnType(?Types.BLOB,?"blob($l)"?);
????????registerColumnType(?Types.CLOB,?"clob($l)"?);
????????registerFunction(?"abs",?new?StandardSQLFunction(?"abs"?)?);
????????registerFunction(?"absval",?new?StandardSQLFunction(?"absval"?)?);
????????registerFunction(?"sign",?new?StandardSQLFunction(?"sign",?Hibernate.INTEGER?)?);
????????registerFunction(?"ceiling",?new?StandardSQLFunction(?"ceiling"?)?);
????????registerFunction(?"ceil",?new?StandardSQLFunction(?"ceil"?)?);
????????registerFunction(?"floor",?new?StandardSQLFunction(?"floor"?)?);
????????registerFunction(?"round",?new?StandardSQLFunction(?"round"?)?);
????????registerFunction(?"acos",?new?StandardSQLFunction(?"acos",?Hibernate.DOUBLE?)?);
????????registerFunction(?"asin",?new?StandardSQLFunction(?"asin",?Hibernate.DOUBLE?)?);
????????registerFunction(?"atan",?new?StandardSQLFunction(?"atan",?Hibernate.DOUBLE?)?);
????????registerFunction(?"cos",?new?StandardSQLFunction(?"cos",?Hibernate.DOUBLE?)?);
????????registerFunction(?"cot",?new?StandardSQLFunction(?"cot",?Hibernate.DOUBLE?)?);
????????registerFunction(?"degrees",?new?StandardSQLFunction(?"degrees",?Hibernate.DOUBLE?)?);
????????registerFunction(?"exp",?new?StandardSQLFunction(?"exp",?Hibernate.DOUBLE?)?);
????????registerFunction(?"float",?new?StandardSQLFunction(?"float",?Hibernate.DOUBLE?)?);
????????registerFunction(?"hex",?new?StandardSQLFunction(?"hex",?Hibernate.STRING?)?);
????????registerFunction(?"ln",?new?StandardSQLFunction(?"ln",?Hibernate.DOUBLE?)?);
????????registerFunction(?"log",?new?StandardSQLFunction(?"log",?Hibernate.DOUBLE?)?);
????????registerFunction(?"log10",?new?StandardSQLFunction(?"log10",?Hibernate.DOUBLE?)?);
????????registerFunction(?"radians",?new?StandardSQLFunction(?"radians",?Hibernate.DOUBLE?)?);
????????registerFunction(?"rand",?new?NoArgSQLFunction(?"rand",?Hibernate.DOUBLE?)?);
????????registerFunction(?"sin",?new?StandardSQLFunction(?"sin",?Hibernate.DOUBLE?)?);
????????registerFunction(?"soundex",?new?StandardSQLFunction(?"soundex",?Hibernate.STRING?)?);
????????registerFunction(?"sqrt",?new?StandardSQLFunction(?"sqrt",?Hibernate.DOUBLE?)?);
????????registerFunction(?"stddev",?new?StandardSQLFunction(?"stddev",?Hibernate.DOUBLE?)?);
????????registerFunction(?"tan",?new?StandardSQLFunction(?"tan",?Hibernate.DOUBLE?)?);
????????registerFunction(?"variance",?new?StandardSQLFunction(?"variance",?Hibernate.DOUBLE?)?);
????????registerFunction(?"julian_day",?new?StandardSQLFunction(?"julian_day",?Hibernate.INTEGER?)?);
????????registerFunction(?"microsecond",?new?StandardSQLFunction(?"microsecond",?Hibernate.INTEGER?)?);
????????registerFunction(?"midnight_seconds",?new?StandardSQLFunction(?"midnight_seconds",?Hibernate.INTEGER?)?);
????????registerFunction(?"minute",?new?StandardSQLFunction(?"minute",?Hibernate.INTEGER?)?);
????????registerFunction(?"month",?new?StandardSQLFunction(?"month",?Hibernate.INTEGER?)?);
????????registerFunction(?"monthname",?new?StandardSQLFunction(?"monthname",?Hibernate.STRING?)?);
????????registerFunction(?"quarter",?new?StandardSQLFunction(?"quarter",?Hibernate.INTEGER?)?);
????????registerFunction(?"hour",?new?StandardSQLFunction(?"hour",?Hibernate.INTEGER?)?);
????????registerFunction(?"second",?new?StandardSQLFunction(?"second",?Hibernate.INTEGER?)?);
????????registerFunction(?"current_date",?new?NoArgSQLFunction(?"current?date",?Hibernate.DATE,?false?)?);
????????registerFunction(?"date",?new?StandardSQLFunction(?"date",?Hibernate.DATE?)?);
????????registerFunction(?"day",?new?StandardSQLFunction(?"day",?Hibernate.INTEGER?)?);
????????registerFunction(?"dayname",?new?StandardSQLFunction(?"dayname",?Hibernate.STRING?)?);
????????registerFunction(?"dayofweek",?new?StandardSQLFunction(?"dayofweek",?Hibernate.INTEGER?)?);
????????registerFunction(?"dayofweek_iso",?new?StandardSQLFunction(?"dayofweek_iso",?Hibernate.INTEGER?)?);
????????registerFunction(?"dayofyear",?new?StandardSQLFunction(?"dayofyear",?Hibernate.INTEGER?)?);
????????registerFunction(?"days",?new?StandardSQLFunction(?"days",?Hibernate.LONG?)?);
????????registerFunction(?"current_time",?new?NoArgSQLFunction(?"current?time",?Hibernate.TIME,?false?)?);
????????registerFunction(?"time",?new?StandardSQLFunction(?"time",?Hibernate.TIME?)?);
????????registerFunction(?"current_timestamp",?new?NoArgSQLFunction(?"current?timestamp",?Hibernate.TIMESTAMP,?false?)?);
????????registerFunction(?"timestamp",?new?StandardSQLFunction(?"timestamp",?Hibernate.TIMESTAMP?)?);
????????registerFunction(?"timestamp_iso",?new?StandardSQLFunction(?"timestamp_iso",?Hibernate.TIMESTAMP?)?);
????????registerFunction(?"week",?new?StandardSQLFunction(?"week",?Hibernate.INTEGER?)?);
????????registerFunction(?"week_iso",?new?StandardSQLFunction(?"week_iso",?Hibernate.INTEGER?)?);
????????registerFunction(?"year",?new?StandardSQLFunction(?"year",?Hibernate.INTEGER?)?);
????????registerFunction(?"double",?new?StandardSQLFunction(?"double",?Hibernate.DOUBLE?)?);
????????registerFunction(?"varchar",?new?StandardSQLFunction(?"varchar",?Hibernate.STRING?)?);
????????registerFunction(?"real",?new?StandardSQLFunction(?"real",?Hibernate.FLOAT?)?);
????????registerFunction(?"bigint",?new?StandardSQLFunction(?"bigint",?Hibernate.LONG?)?);
????????registerFunction(?"char",?new?StandardSQLFunction(?"char",?Hibernate.CHARACTER?)?);
????????registerFunction(?"integer",?new?StandardSQLFunction(?"integer",?Hibernate.INTEGER?)?);
????????registerFunction(?"smallint",?new?StandardSQLFunction(?"smallint",?Hibernate.SHORT?)?);
????????registerFunction(?"digits",?new?StandardSQLFunction(?"digits",?Hibernate.STRING?)?);
????????registerFunction(?"chr",?new?StandardSQLFunction(?"chr",?Hibernate.CHARACTER?)?);
????????registerFunction(?"upper",?new?StandardSQLFunction(?"upper"?)?);
????????registerFunction(?"lower",?new?StandardSQLFunction(?"lower"?)?);
????????registerFunction(?"ucase",?new?StandardSQLFunction(?"ucase"?)?);
????????registerFunction(?"lcase",?new?StandardSQLFunction(?"lcase"?)?);
????????registerFunction(?"length",?new?StandardSQLFunction(?"length",?Hibernate.LONG?)?);
????????registerFunction(?"ltrim",?new?StandardSQLFunction(?"ltrim"?)?);
????????registerFunction(?"rtrim",?new?StandardSQLFunction(?"rtrim"?)?);
????????registerFunction(?"substr",?new?StandardSQLFunction(?"substr",?Hibernate.STRING?)?);
????????registerFunction(?"posstr",?new?StandardSQLFunction(?"posstr",?Hibernate.INTEGER?)?);
????????registerFunction(?"substring",?new?StandardSQLFunction(?"substr",?Hibernate.STRING?)?);
????????registerFunction(?"bit_length",?new?SQLFunctionTemplate(?Hibernate.INTEGER,?"length(?1)*8"?)?);
????????registerFunction(?"trim",?new?AnsiTrimEmulationFunction()?);
????????registerFunction(?"concat",?new?VarArgsSQLFunction(?Hibernate.STRING,?"",?"||",?""?)?);
????????registerFunction(?"str",?new?SQLFunctionTemplate(?Hibernate.STRING,????"rtrim(char(?1))"?)?);
????????registerKeyword(?"current"?);
????????registerKeyword(?"date"?);
????????registerKeyword(?"time"?);
????????registerKeyword(?"timestamp"?);
????????registerKeyword(?"fetch"?);
????????registerKeyword(?"first"?);
????????registerKeyword(?"rows"?);
????????registerKeyword(?"only"?);
????????getDefaultProperties().setProperty(?Environment.STATEMENT_BATCH_SIZE,?NO_BATCH?);
????}
????public?String?getLowercaseFunction()
????{
????????return?"lcase";
????}
????public?String?getAddColumnString()
????{
????????return?"add?column";
????}
????public?boolean?dropConstraints()
????{
????????return?false;
????}
????public?boolean?supportsIdentityColumns()
????{
????????return?true;
????}
????public?String?getIdentitySelectString()
????{
????????return?"values?identity_val_local()";
????}
????public?String?getIdentityColumnString()
????{
????????return?"generated?by?default?as?identity";?//?not?null??(start?with?1)
????????//?is?implicit
????}
????public?String?getIdentityInsertString()
????{
????????return?"default";
????}
????public?String?getSequenceNextValString(?String?sequenceName?)
????{
????????return?"values?nextval?for?"?+?sequenceName;
????}
????public?String?getCreateSequenceString(?String?sequenceName?)
????{
????????return?"create?sequence?"?+?sequenceName;
????}
????public?String?getDropSequenceString(?String?sequenceName?)
????{
????????return?"drop?sequence?"?+?sequenceName?+?"?restrict";
????}
????public?boolean?supportsSequences()
????{
????????return?true;
????}
????public?String?getQuerySequencesString()
????{
????????return?"select?seqname?from?sysibm.syssequences";
????}
????public?boolean?supportsLimit()
????{
????????return?true;
????}
????/**//*
?????*?public?String?getLimitString(String?sql,?boolean?hasOffset)?{?StringBuffer
?????*?rownumber?=?new?StringBuffer(50)?.append("?rownumber()?over(");?int
?????*?orderByIndex?=?sql.toLowerCase().indexOf("order?by");?if?(orderByIndex>0)
?????*?rownumber.append(?sql.substring(orderByIndex)?);?rownumber.append(")?as
?????*?row_,");?StringBuffer?pagingSelect?=?new?StringBuffer(?sql.length()+100?)
?????*?.append("select?*?from?(?")?.append(sql)?.insert(
?????*?getAfterSelectInsertPoint(sql)+16,?rownumber.toString()?)?.append("?)?as
?????*?temp_?where?row_?");?if?(hasOffset)?{?pagingSelect.append("between??+1?and
?????*??");?}?else?{?pagingSelect.append("<=??");?}?return
?????*?pagingSelect.toString();?}
?????*/
????/**?*//**
?????*?Render?the?<tt>rownumber()?over?(?.?)?as?rownumber_,</tt>?bit,?that
?????*?goes?in?the?select?list
?????*/
????private?String?getRowNumber(?String?sql?)
????{
????????StringBuffer?rownumber?=?new?StringBuffer(?50?)
????????????????.append(?"rownumber()?over("?);
????????int?orderByIndex?=?sql.toLowerCase().indexOf(?"order?by"?);
????????if?(?orderByIndex?>?0?)
????????{
????????????String?orderBy?=?sql.substring(?orderByIndex?);?//order?by?bid0_.bid_id?desc,?item.item_id?asc
????????????if?(?hasDistinct(?sql?)?)
????????????{
????????????????for?(?int?fromIndex?=?0;?;??)
????????????????{//?替換?表別名?為?row_
????????????????????int?dotIx?=?orderBy.indexOf(?".",?fromIndex?);
????????????????????if?(?dotIx?==?-1?)?break;
????????????????????int?spaceIx?=?orderBy.substring(?fromIndex,?dotIx?).lastIndexOf(?"?"?);
????????????????????String?tableAlias?=?orderBy.substring(?spaceIx?+?1,?dotIx?);
????????????????????orderBy?=?orderBy.replaceAll(?tableAlias,?"row_"?);????
????????????????????fromIndex?=?dotIx+1;
????????????????}
????????????????for?(?int?fromIndex?=?0;?;??)
????????????????{//?替換?字段名?為?hibernate生成的?字段名別名
????????????????????int?dotIx?=?orderBy.indexOf(?".",?fromIndex?);
????????????????????if?(?dotIx?==?-1?)?break;
????????????????????int?first1?=?orderBy.indexOf(?"?",?dotIx?);//第一個空格
????????????????????int?first2?=?orderBy.indexOf(?",",?dotIx?);//第一個逗號
????????????????????int?endIndex?=?getEndIndex(?first1,?first2?);
????????????????????String?col?=?null;
????????????????????if?(?endIndex?==?-1?)
????????????????????????col?=?orderBy.substring(?dotIx+1?);
????????????????????else??
????????????????????????col?=?orderBy.substring(?dotIx+1,?endIndex?);
????????????????????????
????????????????????//bid0_.bid_id?as?bid1_4_,
????????????????????String?beforeStr?=?"."?+?col?+?"?as?";
????????????????????int?pos?=?sql.indexOf(?beforeStr?);
????????????????????if?(?pos?>?-1?)
????????????????????{
????????????????????????pos?+=?beforeStr.length();
????????????????????????first1?=?sql.indexOf(?"?",?pos?);//第一個空格
????????????????????????first2?=?sql.indexOf(?",",?pos?);//第一個逗號
????????????????????????endIndex?=?getEndIndex(?first1,?first2?);
????????????????????????String?colAlias?=?null;
????????????????????????if?(?endIndex?==?-1?)
????????????????????????????colAlias?=?sql.substring(?pos?);
????????????????????????else??
????????????????????????????colAlias?=?sql.substring(?pos,?endIndex?);
????????????????????????orderBy?=?orderBy.replaceAll(?col,?colAlias?);
????????????????????}
????????????????????fromIndex?=?dotIx+1;
????????????????}
????????????????rownumber.append(?orderBy?);
????????????}
????????????else
????????????????rownumber.append(?orderBy?);
????????}
????????rownumber.append(?")?as?rownumber_,"?);
????????return?rownumber.toString();
????}
????
????private?int?getEndIndex(?int?first1,?int?first2?)
????{
????????if?(?first1?==?-1?&&?first2?==?-1?)
????????????return?-1;
????????else?if?(?first1?>?-1?&&?first2?>?-1?)
????????????return?Math.min(?first1,?first2?);
????????else
????????????return?first1?+?first2?+?1;
????}
????public?String?getLimitString(?String?sql,?boolean?hasOffset?)
????{
????????if?(?log.isDebugEnabled()?)?
????????????log.debug(?"sql?=?"?+?sql?);
????????int?startOfSelect?=?sql.toLowerCase().indexOf(?"select"?);
????????StringBuffer?pagingSelect?=?new?StringBuffer(?sql.length()?+?100?).append(
????????????????sql.substring(?0,?startOfSelect?)?)?//?add?the?comment
????????????????.append(?"select?*?from?(?select?"?)?//?nest?the?main?query?in?an?outer
????????????????????????????????????????????????????????????????????????????????????????????//?select
????????????????.append(?getRowNumber(?sql?)?);?//?add?the?rownnumber?bit?into?the?outer
????????????????????????????????????????????????????????????????????????????????//?query?select?list
????????int?orderByIndex?=?sql.toLowerCase().indexOf(?"order?by"?);
????????if?(?hasDistinct(?sql?)?)
????????{
????????????pagingSelect.append(?"?row_.*?from?(?"?);?//?add?another?(inner)?nested
????????????????????????????????????????????????????????????????????????????????????????????????//?select
????????????//?add?the?main?query
????????????if?(?orderByIndex?>?0?)?//?whithout?ordey?by
????????????????pagingSelect.append(?sql.substring(?startOfSelect,?orderByIndex?)?);
????????????else
????????????????pagingSelect.append(?sql.substring(?startOfSelect?)?);
????????????pagingSelect.append(?"?)?as?row_"?);?//?close?off?the?inner?nested?select
????????}
????????else
????????{//?add?the?main?query
????????????if?(?orderByIndex?>?0?)?//?whithout?ordey?by
????????????????pagingSelect.append(?sql.substring(?startOfSelect?+?6,?orderByIndex?)?);
????????????else
????????????????pagingSelect.append(?sql.substring(?startOfSelect?+?6?)?);
????????}
????????pagingSelect.append(?"?)?as?temp_?where?rownumber_?"?);
????????//?add?the?restriction?to?the?outer?select
????????if?(?hasOffset?)
????????{
????????????pagingSelect.append(?"between??+1?and??"?);
????????}
????????else
????????{
????????????pagingSelect.append(?"<=??"?);
????????}
????????if?(?log.isDebugEnabled()?)??
????????????log.debug(?"pagingSelectSQL?=?"?+?pagingSelect.toString()?);
????????
????????return?pagingSelect.toString();
????}
????private?static?boolean?hasDistinct(?String?sql?)
????{
????????return?sql.toLowerCase().indexOf(?"select?distinct"?)?>=?0;
????}
????public?String?getForUpdateString()
????{
????????return?"?for?read?only?with?rs";
????}
????public?boolean?useMaxForLimit()
????{
????????return?true;
????}
????public?boolean?supportsOuterJoinForUpdate()
????{
????????return?false;
????}
????public?boolean?supportsNotNullUnique()
????{
????????return?false;
????}
????public?String?getSelectClauseNullString(?int?sqlType?)
????{
????????String?literal;
????????switch?(?sqlType?)
????????{
????????????case?Types.VARCHAR:
????????????case?Types.CHAR:
????????????????literal?=?"'x'";
????????????????break;
????????????case?Types.DATE:
????????????????literal?=?"'2000-1-1'";
????????????????break;
????????????case?Types.TIMESTAMP:
????????????????literal?=?"'2000-1-1?00:00:00'";
????????????????break;
????????????case?Types.TIME:
????????????????literal?=?"'00:00:00'";
????????????????break;
????????????default:
????????????????literal?=?"0";
????????}
????????return?"nullif("?+?literal?+?','?+?literal?+?')';
????}
????public?static?void?main(?String[]?args?)
????{
????????System.out.println(?new?DB2Dialect().getLimitString(
????????????????"/*foo*/?select?*?from?foos",?true?)?);
????????System.out.println(?new?DB2Dialect().getLimitString(
????????????????"/*foo*/?select?distinct?*?from?foos",?true?)?);
????????System.out.println(?new?DB2Dialect().getLimitString(
????????????????"/*foo*/?select?*?from?foos?foo?order?by?foo.bar,?foo.baz",?true?)?);
????????System.out.println(?new?DB2Dialect().getLimitString(
????????????????"/*foo*/?select?distinct?*?from?foos?foo?order?by?foo.bar,?foo.baz",
????????????????true?)?);
????????String?sql?=?"select?distinct?bid0_.bid_id?as?bid1_4_,?bid0_.downloadFilePath?as?download2_4_,?bid0_.agency?as?agency4_,?bid0_.updateTime?as?updateTime4_,?bid0_.effectTime?as?effectTime4_,?bid0_.explainText?as?explainT6_4_,?bid0_.name?as?name4_,?bid0_.people?as?people4_,?bid0_.state?as?state4_,?bid0_.report?as?report4_,?bid0_.bid_project_id?as?bid11_4_,?bid0_.company_account_id?as?company12_4_,?bid0_.area_id?as?area13_4_?from?bid?bid0_?inner?join?bid_allow_member?allowmembe1_?on?bid0_.bid_id=allowmembe1_.bid_id?where?allowmembe1_.department_id=1381?and?bid0_.area_id=5?and?bid0_.state>0?order?by?bid0_.bid_id?desc";
????????System.out.println(?new?DB2Dialect().getLimitString(?sql,?true?)?);
????}
????public?boolean?supportsUnionAll()
????{
????????return?true;
????}
????public?int?registerResultSetOutParameter(?CallableStatement?statement,?int?col?)
????????????throws?SQLException
????{
????????return?col;
????}
????public?ResultSet?getResultSet(?CallableStatement?ps?)
????????????throws?SQLException
????{
????????boolean?isResultSet?=?ps.execute();
????????//?This?assumes?you?will?want?to?ignore?any?update?counts
????????while?(?!isResultSet?&&?ps.getUpdateCount()?!=?-1?)
????????{
????????????isResultSet?=?ps.getMoreResults();
????????}
????????ResultSet?rs?=?ps.getResultSet();
????????//?You?may?still?have?other?ResultSets?or?update?counts?left?to?process?here
????????//?but?you?can't?do?it?now?or?the?ResultSet?you?just?got?will?be?closed
????????return?rs;
????}
????public?boolean?supportsCommentOn()
????{
????????return?true;
????}
????public?boolean?supportsTemporaryTables()
????{
????????return?true;
????}
????public?String?getCreateTemporaryTableString()
????{
????????return?"declare?global?temporary?table";
????}
????public?String?getCreateTemporaryTablePostfix()
????{
????????return?"not?logged";
????}
????public?String?generateTemporaryTableName(?String?baseTableName?)
????{
????????return?"session."?+?super.generateTemporaryTableName(?baseTableName?);
????}
????public?boolean?supportsCurrentTimestampSelection()
????{
????????return?true;
????}
????public?String?getCurrentTimestampSelectString()
????{
????????return?"values?current?timestamp";
????}
????public?boolean?isCurrentTimestampSelectStringCallable()
????{
????????return?false;
????}
????public?boolean?supportsParametersInInsertSelect()
????{
????????//?DB2?known?to?not?support?parameters?within?the?select
????????//?clause?of?an?SQL?INSERT??SELECT??statement
????????return?false;
????}
????public?String?getCurrentTimestampSQLFunctionName()
????{
????????return?"sysdate";
????}
}
評論:
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# re: hibernate中DB2數據庫的dialect分頁問題
Posted @ 2006-12-27 14:25
fdsfsdf 回復 更多評論
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# re: hibernate中DB2數據庫的dialect分頁問題
Posted @ 2007-08-27 11:35
good! DB2 V8.2 依舊， DB2Dialect 有問題 回復 更多評論
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# re: hibernate中DB2數據庫的dialect分頁問題
Posted @ 2010-09-07 22:00
不幸被你言中，DB2 V7.X 已出來10年有余，我還在為前輩的bug而焦頭爛額！！！ 回復 更多評論
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