Sorting for the procedure is not working

Question

can you help why the sorting is not working here.I am running the below procedure to sort asc and desc and when I do sort in descending order by a different column it gives me a different rows sorted in desc order. what i
want the proecdure to do it to sort the recordset in asc and desc order without changing the selected rows
SQL>  exec trnsportitems.gettrnsportitems(1,10,'itemnumber desc', :n, :c);
PL/SQL procedure successfully completed.
SQL> print c;
ITEMNUMBER              R IDESCR                                   IDESCRL                                                      IUNI IS I ITEM
2011.601/00002          1 TUNNEL CONSTRUCTION LAYOUT STAKING       TUNNEL CONSTRUCTION LAYOUT STAKING                           LS   0
2011.601/00003          2 CONSTRUCTION SURVEYING                   CONSTRUCTION SURVEYING                                       LS   05 N 2011601/00003
2011.601/00010          3 VIBRATION MONITORING                     VIBRATION MONITORING                                         LS   05 N 2011601/00010
2011.601/00020          4 REVISED BRIDGE PLANS                     REVISED BRIDGE PLANS                                         LS   05 N 2011601/00020
2011.601/00040          5 DESIGN                                   DESIGN                                                       LS   05 N 2011601/00040
2011.601/00050          6 DESIGN AND CONSTRUCT                     DESIGN AND CONSTRUCT                                         LS   05 N 2011601/00050
2011.601/08010          7 SUPPLEMENTAL DESCRIPTION                 SUPPLEMENTAL DESCRIPTION                                     LS   05 N 2011601/08010
2011.601/08011          8 SUPPLEMENTAL DESCRIPTION                 SUPPLEMENTAL DESCRIPTION                                     LS   05 N 2011601/08011
2011.601/08012          9 SUPPLEMENTAL DESCRIPTION                 SUPPLEMENTAL DESCRIPTION                                     LS   05 N 2011601/08012
2011.601/08013         10 SUPPLEMENTAL DESCRIPTION                 SUPPLEMENTAL DESCRIPTION                                     LS   05 N 2011601
10 rows selected.
SQL>
SQL>  exec trnsportitems.gettrnsportitems(1,10,'idescr DESC', :n, :c);
PL/SQL procedure successfully completed.
SQL> print c;
ITEMNUMBER              R IDESCR                                   IDESCRL                                                      IUNI IS I ITEM
2563.613/00040          1 YELLOW TUBE DELINEATORS                  YELLOW TUBE DELINEATORS                                      UDAY 05 N 2563613/00040
2563.602/00100          2 YELLOW TUBE DELINEATOR                   YELLOW TUBE DELINEATOR                                       EACH 05 N 2563602/00100
2565.602/00940          3 YELLOW LED INDICATION                    YELLOW LED INDICATION                                        EACH 05 N 2565602/00940
2502.602/00040          4 YARD DRAIN                               YARD DRAIN                                                   EACH 05 N 2502602/00040
2411.601/00030          5 WYE STRUCTURE                            WYE STRUCTURE                                                LS   05 N 2411601/00030
2557.603/00041          6 WOVEN WIRE FENCE                         WOVEN WIRE FENCE                                             L F  05 N 2557603/00041
2557.603/00043          7 WOVEN WIRE                               WOVEN WIRE                                                   L F  05 N 2557603/00043
2563.613/00615          8 WORK ZONE SPEED LIMIT SIGN               WORK ZONE SPEED LIMIT SIGN                                   UDAY 05 N 2563613/00
2563.613/00610          9 WORK ZONE SPEED LIMIT                    WORK ZONE SPEED LIMIT                                        UDAY 05 N 2563613/00610
2557.603/00035         10 WOODEN FENCE                             WOODEN FENCE                                                 L F  05 N 2557603/00035
10 rows selected.

Answer 1

Hi,
user13258760 wrote:
can you help why the sorting is not working here.I am running the below procedure to sort asc and desc and when I do sort in descending order by a different column it gives me a different rows sorted in desc order. what i
want the proecdure to do it to sort the recordset in asc and desc order without changing the selected rowsAs it is written now, the argument insortexp has nothing to do with the order of the rows. It is used only in computing column r, and column r is used only in the WHERE clause.
Are you really saying you don't want a WHERE clause at all in the main query: that you always want the cursor to contain all rows from itemlist that meet the 3 hard-coded conditions:
...                     WHERE item  '2999509/00001'     -- Did you mean != here?
                          AND iobselet = 'N'
                          AND ispecyr = '05'?
If so, change the main query WHERE clause:
WHERE r BETWEEN instartrowindex AND inendrowindexinto an ORDER BY clause:
ORDER BY  rBy the way, you might want to make insortexp case-insensitive.
In your example, you're calling the procedure with all small letters in insortexp:
user13258760 wrote:
SQL> exec trnsportitems.gettrnsportitems(1,10,'itemnumber desc', :n, :c);but the output is coming in ASC ending order:
...                           ORDER BY
                                 DECODE (insortexp, 'itemnumber ASC', item) ASC,
                                 DECODE (insortexp, 'itemnumber DESC', item) DESC,     -- capital 'DESC' won't match small 'desc'
                                 DECODE (insortexp, 'idescr ASC', idescr) ASC,
                                 DECODE (insortexp, 'idescr DESC', idescr) DESC,
                                 DECODE (insortexp, 'idescrl ASC', idescrl) ASC,
                                 DECODE (insortexp, 'idescrl DESC', idescrl) DESC,
                                 DECODE (insortexp, 'iunits ASC', iunits) ASC,
                                 DECODE (insortexp, 'iunits DESC', iunits) DESC,
                                 DECODE (insortexp, 'ispecyr ASC', ispecyr) ASC,
                                 DECODE (insortexp, 'ispecyr DESC', ispecyr) DESc,
                               SUBSTR (item, 1, 4) || '.' || SUBSTR (item, 5)          -- This is the only non-NULL ORDER BY expression     Why not declare a local variable:
sortexp      VARCHAR2 (20) := LOWER (insortexp);and use that variable instead of the raw argument in the query:
...                              DECODE (sortexp, 'itemnumber asc',  item) ASC,
                                 DECODE (sortexp, 'itemnumber desc', item) DESC, ...Also, this site doesn't like to display the <> operator, even inside \ tags.  When posting here, always use the other inequality operator, !=
Edited by: Frank Kulash on Jun 15, 2010 3:25 PM