Reg: Generating range values

Hi Experts,

I'm struggling to resolve this issue for the moment quite sometimes, but not luck...

Sample data :

with t as)

Select 1 id, 'D1005-D1009"dual UNION ALL val

Select 2 id, val "K3630-K3633" of the double

)

Expected o/p :

1 D1005

1 D1006

1 D1007

D1008 1

1 D1009

2 K3630

2 K3631

2 K3632

2 K3633

My test :

with t as)

-Select 1 id, 'D1005-D1009"dual UNION ALL val

Select 2 id, val "K3630-K3633" of the double

)

Select

ID,

-substr(val,1,1) prefix,

-pos instr(val,'-'),

-ltrim (substr (val, 1, instr(val,'-')-1), substr (val, 1, 1)) s_str,.

-ltrim (substr (val, instr(val,'-') + 1), substr (val, 1, 1)) e_str,.

substr (Val, 1, 1) | (ltrim (substr (val, 1, instr(val,'-')-1), substr (val, 1, 1)) + level - 1) vals

t

connect by level < = (ltrim (substr (val, instr(val,'-') + 1), substr (val, 1, 1))-ltrim (substr (val, 1, instr(val,'-')-1), substr (val, 1, 1))) + 1

;



2 K3630
2 K3631
2 K3632
2 K3633


I guess something like NOCYCLE clause can be useful... search...

Pointers?

Thank you

-Nordine

(on Oracle 11.2.0.4.0)

This should be faster than the approach CONNECT-larger sets of data:

select /*+ no_xml_query_rewrite */
       t.id
     , substr(t.val, 1, 1) || to_char(x.val, 'fm0999') as val
from test_range t
   , xmltable(
       'for $i in xs:integer(substring(substring-before($range, "-"), 2))
               to xs:integer(substring(substring-after($range, "-"), 2))
        return $i'
       passing t.val as "range"
       columns val number path '.'
     ) x ;

create table test_range (id integer, val varchar2(12));

insert into test_range
select level, chr(64+level)||'0000-'||chr(64+level)||'9999'
from dual
connect by level <= 26;

SQL> WITH    got_nums    AS
  2  (
  3      SELECT  id
  4      ,       SUBSTR (val, 1, 1)   AS prefix
  5      ,       TO_NUMBER ( SUBSTR ( val
  6                                 , 2
  7                                 , INSTR (val, '-') -2
  8                                 )
  9                        )          AS low_num
 10      ,       TO_NUMBER ( SUBSTR ( val
 11                                 , INSTR (val, '-') + 2
 12                                 )
 13                        )          AS high_num
 14      FROM  test_range  t
 15  )
 16  SELECT    id
 17  ,         prefix || TO_CHAR (low_num + LEVEL - 1, 'fm0999')  AS vals
 18  FROM      got_nums
 19  CONNECT BY  LEVEL               <= high_num + 1 - low_num
 20  AND         PRIOR               id  = id
 21  AND         PRIOR  SYS_GUID ()  IS NOT NULL
 22  ;

260000 rows selected.

Elapsed: 00:00:11.71

Statistics
----------------------------------------------------------
          0  recursive calls
          0  db block gets
          7  consistent gets
          0  physical reads
          0  redo size
    6171324  bytes sent via SQL*Net to client
     191215  bytes received via SQL*Net from client
      17335  SQL*Net roundtrips to/from client
          1  sorts (memory)
          0  sorts (disk)
     260000  rows processed

SQL>
SQL> select /*+ no_xml_query_rewrite */
  2         t.id
  3       , substr(t.val, 1, 1) || to_char(x.val, 'fm0999') as val
  4  from test_range t
  5     , xmltable(
  6         'for $i in xs:integer(substring(substring-before($range, "-"), 2))
  7                 to xs:integer(substring(substring-after($range, "-"), 2))
  8          return $i'
  9         passing t.val as "range"
 10         columns val number path '.'
 11       ) x ;

260000 rows selected.

Elapsed: 00:00:02.99

Statistics
----------------------------------------------------------
          0  recursive calls
          0  db block gets
         32  consistent gets
          0  physical reads
          0  redo size
    6171323  bytes sent via SQL*Net to client
     191215  bytes received via SQL*Net from client
      17335  SQL*Net roundtrips to/from client
          0  sorts (memory)
          0  sorts (disk)
     260000  rows processed

Tags: Database

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1     1     1     g     
1     1     2     h     
1     1     2     e     
1     1     3     i     
1     1     3     f     
2     1     1     v     
2     1     1     p     
2     1     1     r     
2     1     1     t     
2     1     2     u     
2     1     2     q     
2     1     2     o     
2     1     2     s     
2     1     2     w     
3     3     7     b     
3     3     7     e     
3     3     8     `     
3     3     8     f     
3     3     8     c     
3     3     9     d     
3     3     9     a     
3     3     9     g     
4     3     1     e     
4     3     1     c     
4     3     1     a     
4     3     2     b     
4     3     2     `     
4     3     2     d     
7     3     1     ^     
7     3     2     ]     
7     3     2     _     
    expected results
    JOB_REQUEST_ID     ORIGINAL_JOB_REQUEST_ID     SEQUENCE_CD     VALUE_TXT     NEW_SEQUENCE_CD
1     1     1     g     1
1     1     2     h     2
1     1     2     e     2
1     1     3     i     3
1     1     3     f     3
2     1     1     v     4
2     1     1     p     4
2     1     1     r     4
2     1     1     t     4
2     1     2     u     5
2     1     2     q     5
2     1     2     o     5
2     1     2     s     5
2     1     2     w     5
3     3     7     b     7
3     3     7     e     7
3     3     8     `     8
3     3     8     f     8
3     3     8     c     8
3     3     9     d     9
3     3     9     a     9
3     3     9     g     9
4     3     1     e     10
4     3     1     c     10
4     3     1     a     10
4     3     2     b     11
4     3     2     `     11
4     3     2     d     11
7     3     1     ^     12
7     3     2     ]     13
7     3     2     _     13
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