Question : cursors in Sybase

Hello All,

I need some help regarding the implementation of nested cursers in sybase. I have created a stored procedure below to do the below task. The issue is that I am getting the same string inserted for all the PDBC_PFX in the target table.
I have tried to use SET @lResult='' in the inner cursor and then its inserting all the blank values into the target table. Please advice.
 
Source table : CMC_BSTX_SUM_TEXT
PDBC_PFX   SEQ_NO       BSTX_TEXT                                                              
--------         -----------         ---------                                                              
1579              0                   BCN5, CO20, ER75
1579              1                   FP5, WC6, MATW, OPRH
1579              2                   T
1600              0                   TW, FP5, AS5, MHSA15, DME20
1600              1                   ER100, UR40
 
Expected output in Target table  : CMC_BSTX_SUM_TEXT_TEMP (concatenate multiple rows into a single row in the ascending order of SEQ_NO)

PDBC_PFX        BSTX_TEXT
-------------        -----------------------
1579                  BCN5, CO20, ER75FP5, WC6, MATW, OPRHT
1600                  TW, FP5, AS5, MHSA15, DME20ER100, UR40

************************************************************************************************************
CREATE PROC test11
AS
BEGIN
 DECLARE @CODE1 char(4),
                  @lResult char(255),
                  @lText char(255)
 DECLARE c1 CURSOR
      FOR
      SELECT distinct PDBC_PFX  FROM CMC_BSTX_SUM_TEXT  
      COMMIT
      OPEN  c1
      FETCH c1 INTO @CODE1

  While (@@SQLSTATUS !=2)
  BEGIN
                  DECLARE curmovedown CURSOR
                  FOR
                        SELECT TEXT
                    FROM CMC_BSTX_SUM_TEXT where PDBC_PFX =@CODE1  order by SEQ_NO
        COMMIT
        OPEN  curmovedown
        FETCH curmovedown INTO  @lText
                               While (@@SQLSTATUS !=2)
                               BEGIN
                               SET @lResult= @lResult+@lText                  
                               FETCH curmovedown INTO @lText
                               END
       insert into CMC_BSTX_SUM_TEXT_TEMP values (@CODE1,@lResult)        
       COMMIT
       CLOSE curmovedown
       DEALLOCATE CURSOR curmovedown
FETCH c1 INTO @CODE1
 END
CLOSE c1
DEALLOCATE CURSOR c1
END  
*********************************************************************************************************************

Answer : cursors in Sybase

Cursors in general and nested cursors in particular are to be avoided wherever possible.  Nested cursors perform about as poorly as any construct you can come up with and, as you are finding out, are a pain in the neck to get correct.

I just finished responding to your original question with a simply solution that, mercifully, does not require cursors.

Regards,
Bill