MYSQL LIMIT not working as expected - Java
- by Sirish
I have this weird problem in java when trying to fetch records from MYSql database by using the limit function in the query. Not sure what went wrong or did wrong, this query is giving me a hard time.
Issue - When I run this query through my java program it returns all the records and not limiting the records to 10 as given in the limit.
The same query when ran in MYSql command line, it execute very well and fetches me only 10 recrods.
Below is the java code and query. Any help or support is appreciated.!
Java code -
public UserVO getApplUserDetailsList(UserVO userVO) throws CAPDAOException {
List<UserVO> returnList = null;
String methodName = "getApplUserDetails()";
Session session = null;
String queryString = null;
Transaction transaction = null;
PreparedStatement ps = null;
ResultSet rs = null;
if(userVO == null)
{
logger.writeToTivoliAlertLog(className, CAPConstants.ERROR, methodName, null, "userVO returned null. Busines validation error.!", null);
throw new CAPDAOException("userVO returned null. Busines validation error.!",CAPException.BUSINESS_VALIDATION_ERROR_SECURITY);
}
try {
returnList = new ArrayList<UserVO>();
System.out.println("");
String appusr = userVO.getAppUsrNm();
session = getSession();
transaction = session.beginTransaction();
if(userVO.getAppUsrRoleCd()!=null && !userVO.getAppUsrRoleCd().trim().equalsIgnoreCase(CAPConstants.DEFAULT_DROPDOWN_VALUE)){
queryString = "SELECT " +
"APPL_USR_ID,APPL_USR_NM,APPL_USR_FRST_NM, " +
"APPL_USR_LST_NM,ACCESS_ROLE_CD " +
"FROM APPL_USR " +
"WHERE " +
"APPL_USR_NM LIKE ?"+
" AND APPL_USR_FRST_NM LIKE ?"+
" AND APPL_USR_LST_NM LIKE ?"+
" AND ACCESS_ROLE_CD = ?"+
" AND APPL_USR_ID != ?";
ps = session.connection().prepareStatement(queryString);
ps.setString(1,userVO.getAppUsrNm()+CAPConstants.PERCENTILE_SYMBOL);
ps.setString(2,userVO.getAppUsrFirstNm()+CAPConstants.PERCENTILE_SYMBOL);
ps.setString(3,userVO.getAppUsrLastNm()+CAPConstants.PERCENTILE_SYMBOL);
ps.setString(4,userVO.getAppUsrRoleCd());
ps.setInt(5, 1);
}
else
{
queryString = "SELECT " +
"APPL_USR_ID,APPL_USR_NM,APPL_USR_FRST_NM, " +
"APPL_USR_LST_NM,ACCESS_ROLE_CD " +
"FROM APPL_USR " +
"WHERE " +
"APPL_USR_NM LIKE ?"+
" AND APPL_USR_FRST_NM LIKE ?"+
" AND APPL_USR_LST_NM LIKE ?"+
" AND APPL_USR_ID != ?";
ps = session.connection().prepareStatement(queryString);
ps.setString(1,userVO.getAppUsrNm()+CAPConstants.PERCENTILE_SYMBOL);
ps.setString(2,userVO.getAppUsrFirstNm()+CAPConstants.PERCENTILE_SYMBOL);
ps.setString(3,userVO.getAppUsrLastNm()+CAPConstants.PERCENTILE_SYMBOL);
ps.setInt(4, 1);
}
if(userVO.getQueryAction()!=null && userVO.getQueryAction().equals(CAPConstants.GET_DATA))
queryString += " ORDER BY APPL_USR_ID LIMIT " + userVO.getPAGE_MIN_LIMIT() + ", " + userVO.getPAGE_MAX_LIMIT();
else
queryString += " ORDER BY APPL_USR_ID";
rs = ps.executeQuery();
if(userVO.getQueryAction()!=null && userVO.getQueryAction().equals(CAPConstants.GET_DATA))
{
int tempCOunt = 0;
while(rs!=null && rs.next())
{
tempCOunt ++;
UserVO returnVO = new UserVO();
returnVO.setAppUsrId(rs.getInt("APPL_USR_ID"));
returnVO.setAppUsrNm(rs.getString("APPL_USR_NM"));
returnVO.setAppUsrFirstNm(rs.getString("APPL_USR_FRST_NM"));
returnVO.setAppUsrLastNm(rs.getString("APPL_USR_LST_NM"));
if (rs.getString("ACCESS_ROLE_CD")!=null && rs.getString("ACCESS_ROLE_CD").trim().equalsIgnoreCase(CAPConstants.ADMINISTRATOR_ROLE_CD))
returnVO.setApplicationLevelRole("Administrator");
else if (rs.getString("ACCESS_ROLE_CD")!=null && rs.getString("ACCESS_ROLE_CD").trim().equalsIgnoreCase(CAPConstants.MAINTAINER_ROLE_CD))
returnVO.setApplicationLevelRole("Maintainer");
else if (rs.getString("ACCESS_ROLE_CD")!=null && rs.getString("ACCESS_ROLE_CD").trim().equalsIgnoreCase(CAPConstants.VIEWER_ROLE_CD))
returnVO.setApplicationLevelRole("Viewer");
else
returnVO.setApplicationLevelRole("None");
returnList.add(returnVO);
}
System.out.println("Count >>>>>>>>>>>>>>>>>>> "+tempCOunt);
userVO.setReturnListFromDB(returnList);
}
else
{
int rowcount = 0;
if (rs.last()) {
rowcount = rs.getRow();
rs.beforeFirst(); // not rs.first() because the rs.next() below will move on, missing the first element
}
userVO.setTotalRecordCount(rowcount);
System.out.println("Total count of the records to be used for pagination >> "+rowcount);
rowcount = 0;
while(rs!=null && rs.next())
{
rowcount ++;
UserVO returnVO = new UserVO();
returnVO.setAppUsrId(rs.getInt("APPL_USR_ID"));
returnVO.setAppUsrNm(rs.getString("APPL_USR_NM"));
returnVO.setAppUsrFirstNm(rs.getString("APPL_USR_FRST_NM"));
returnVO.setAppUsrLastNm(rs.getString("APPL_USR_LST_NM"));
if (rs.getString("ACCESS_ROLE_CD")!=null && rs.getString("ACCESS_ROLE_CD").trim().equalsIgnoreCase(CAPConstants.ADMINISTRATOR_ROLE_CD))
returnVO.setApplicationLevelRole("Administrator");
else if (rs.getString("ACCESS_ROLE_CD")!=null && rs.getString("ACCESS_ROLE_CD").trim().equalsIgnoreCase(CAPConstants.MAINTAINER_ROLE_CD))
returnVO.setApplicationLevelRole("Maintainer");
else if (rs.getString("ACCESS_ROLE_CD")!=null && rs.getString("ACCESS_ROLE_CD").trim().equalsIgnoreCase(CAPConstants.VIEWER_ROLE_CD))
returnVO.setApplicationLevelRole("Viewer");
else
returnVO.setApplicationLevelRole("None");
returnList.add(returnVO);
System.out.println("Row count >>"+rowcount);
if(rowcount == CAPConstants.PAGINATION_MAX_VALUE)
break;
}
rowcount = 0;
userVO.setReturnListFromDB(returnList);
}
System.out.println("returnList >>"+returnList);
return userVO;
} catch (Throwable e) {
e.printStackTrace();
logger.writeToTivoliAlertLog(className, CAPConstants.ERROR, methodName, userVO.getAppUsrNm(), "Error occured while trying to fetch application user details. Printing stack trace to the log for analysis..", e);
throw new CAPDAOException("Error occured while trying to fetch application user details.",CAPException.SPEXECUTION_ERROR_CODE);
}
finally{
closeTransactionAndSession(session,transaction);
}
}
MYSQL Query -
SELECT APPL_USR_ID,APPL_USR_NM,APPL_USR_FRST_NM, APPL_USR_LST_NM,ACCESS_ROLE_CD
FROM APPL_USR WHERE APPL_USR_NM LIKE '%'
AND APPL_USR_FRST_NM LIKE '%'
AND APPL_USR_LST_NM LIKE '%'
AND APPL_USR_ID != 1
ORDER BY APPL_USR_ID
LIMIT 10, 10
