code: public String createWhere4Join(Map requestParamMap0,String joinName,String colsStr) throws Exception{
  		//add 201902 ning
  		Map requestParamMap=new CaseInsensitiveKeyMap();
  		if(requestParamMap0!=null){
  			requestParamMap.putAll(requestParamMap0);
  		}
  		
  		String[] colsArray=colsStr.split(",");
  		Map<String,String> colsMap=new HashMap();
  		for(String colName:colsArray){
  			String[] asArray=colName.split(" as ");
  			String diffName=asArray[0];
  			String keyName=diffName;
  			int index=keyName.indexOf(".");
  			keyName=keyName.substring(index);
  			if(asArray.length>1){
  				keyName=asArray[1];
  			}
  			
  			colsMap.put(keyName, diffName);
  		}
  		Map modelEntryMap=getModelEntryMap(requestParamMap,joinName,null,dbName,colsStr);
  		Map requestParamMapEx=new HashMap();
  		Map modelEntryMapEx=new HashMap();
  		Set<String> keySet=colsMap.keySet();
  		for(String colKey:keySet){
  			String diffName=colsMap.get(colKey);
  			requestParamMapEx.put(diffName, requestParamMap.get(colKey));
  			modelEntryMapEx.put(diffName, modelEntryMap.get(colKey));
  			
  		}
  		String retStr= createWhereInStr(requestParamMapEx, modelEntryMapEx);
  		return retStr;
  	}
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