Please guide to improve the performance of XML column reading query.

Question

Hi Experts,
The below query is taking 45 seconds to return 170 records.
Due to selecting XMLTYPE column in query.
select *
from RANGE where WSNO = 3
order by PREFERENCE desc;
The total number of records in the table is 1060.
Even it's a very small table why it's taking 45 seconds.
Can anybody please help me on how to get the output in 2 to 3 seconds.
I want all the columns from the table.
The problem only with REST column XMLTYPE.
If I am not selecting this column I am getting output in 1 to 2 seconds.
I am posting the execution plan and DDL for table and index.
PLAN_TABLE_OUTPUT
Plan hash value: 3593186720
| SNO  | Operation                    | EMPNAME                   | Rows  | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT             |                        |    31 | 23281 |    21   (5)| 00:00:01 |
|   1 |  SORT ORDER BY               |                        |    31 | 23281 |    21   (5)| 00:00:01 |
|   2 |   TABLE ACCESS BY INDEX ROWID | RANGE                 |    31 | 23281 |    20   (0)| 00:00:01 |
|*  3 |    INDEX RANGE SCAN          | INDX_WSNO              |    31 |       |     1   (0)| 00:00:01 |
Predicate Information (SNOentified by operation SNO):
   3 - access("WSNO"=3)
CREATE TABLE RANGE
  SNO                              NUMBER,
  BUSNO                            NUMBER,
  EMPNAME                          NVARCHAR2(64),
  PREFERENCE                       NUMBER,
  TSNO                             NUMBER,
  MEMBER                          CHAR(1 CHAR) ,
  EQU                             CHAR(1 CHAR) ,
  REMAIL                          CHAR(1 CHAR) ,
  SSR                             CHAR(1 CHAR) ,
  SUB                             CHAR(1 CHAR) ,
  SPN                             CHAR(1 CHAR) ,
  SEMPNAME                        NVARCHAR2(128),
  FVL                             NUMBER(32),
  TVL                             NUMBER(32),
  ISD                             CHAR(1 CHAR),
  CHANGED                         NVARCHAR2(64),
  CDATE                           TIMESTAMP(6) ,
  UDBY                            NVARCHAR2(64),
  UDATE                           TIMESTAMP(6),
  LSTU                            CLOB,
  WSNO                            NUMBER,
  ASTN                            CHAR(1 CHAR),
  ASTNPL                          CHAR(1 CHAR),
  AVAF                            CHAR(1 CHAR),
  REST                            SYS.XMLTYPE
TABLESPACE USERS
PCTUSED    0
PCTFREE    10
INITRANS   11
MAXTRANS   255
STORAGE    (
            INITIAL          64K
            NEXT             1M
            MINEXTENTS       1
            MAXEXTENTS       UNLIMITED
            PCTINCREASE      0
            BUFFER_POOL      DEFAULT
XMLTYPE REST STORE AS CLOB
      ( TABLESPACE  USERS
        ENABLE      STORAGE IN ROW
        CHUNK       8192
        PCTVERSION  10
        NOCACHE
        INDEX       (
          TABLESPACE USERS
          STORAGE    (
                      INITIAL          64K
                      NEXT             1
                      MINEXTENTS       1
                      MAXEXTENTS       UNLIMITED
                      PCTINCREASE      0
                      BUFFER_POOL      DEFAULT
        STORAGE    (
                    INITIAL          64K
                    NEXT             1M
                    MINEXTENTS       1
                    MAXEXTENTS       UNLIMITED
                    PCTINCREASE      0
                    BUFFER_POOL      DEFAULT
  LOB (LSTU) STORE AS
      ( TABLESPACE  USERS
        ENABLE      STORAGE IN ROW
        CHUNK       8192
        RETENTION
        NOCACHE
        INDEX       (
          TABLESPACE USERS
          STORAGE    (
                      INITIAL          64K
                      NEXT             1
                      MINEXTENTS       1
                      MAXEXTENTS       UNLIMITED
                      PCTINCREASE      0
                      BUFFER_POOL      DEFAULT
        STORAGE    (
                    INITIAL          64K
                    NEXT             1M
                    MINEXTENTS       1
                    MAXEXTENTS       UNLIMITED
                    PCTINCREASE      0
                    BUFFER_POOL      DEFAULT
NOCACHE
NOPARALLEL
MONITORING;
CREATE INDEX INDX_WSNO ON RANGE(WSNO);
CREATE UNIQUE INDEX RULE_EMPNAME ON RANGE(BUSNO, EMPNAME);
Please help me how to improve the performance of this query.
Thanks.

Answer 1

Can you try something like this and check if its faster? (this is just my guess as I dont have your data )
SELECT SNO,
       BUSNO,
       EMPNAME,
       PREFERENCE,
       TSNO,
       MEMBER,
       EQU,
       REMAIL,
       SSR,
       SUB,
       SPN,
       SEMPNAME,
       FVL,
       TVL,
       ISD,
       CHANGED,
       CDATE,
       UDBY,
       UDATE,
       LSTU,
       WSNO,
       ASTN,
       ASTNPL,
       AVAF,
       xmltype.getclobval (rest) rest
  FROM RANGE
WHERE wsno = 3
order by PREFERENCE desc;
Cheers,
Manik.