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Displaying binary data as "readable" such

 
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misi01
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Joined: 02 Dec 2002
Posts: 620
Topics: 173
Location: Stockholm, Sweden
PostPosted: Thu May 16, 2024 5:04 am    Post subject: Displaying binary data as "readable" such Reply with quote
I'm selecting data from a DB2 table that contains 2 binary fields. These fields (in reality) contain the equivalent of a DL/1 segment, so they can easily contain a mixture of character and COMP-3 fields.
The following is the actual select statement I'm using
Code:

SELECT T6H0.PNR
     ,hex(SUBSTR(T6H0.DL1_SEGMENT1,01,2)) AS GENNR
     ,T6H0.NAMN 
     ,T6H0.ADR
     ,T6H0.POSTNR
     ,T6H0.ORT
     ,T6H0.NAMNKOD                   
     ,hex(SUBSTR(T6H0.DL1_SEGMENT2,01,1))  AS ROLL                         
     ,hex(SUBSTR(T6H0.DL1_SEGMENT2,02,5)) AS DFLDAT                       
     ,hex(SUBSTR(T6H0.DL1_SEGMENT2,07,1)) AS KUNDKOD1                     
     ,hex(SUBSTR(T6H0.DL1_SEGMENT2,08,1)) AS KUNDKOD2                     
     ,hex(SUBSTR(T6H0.DL1_SEGMENT2,09,1)) AS KUADRKOD                     
     ,hex(SUBSTR(T6H0.DL1_SEGMENT2,10,5)) AS ANSVDC                       
     ,hex(SUBSTR(T6H0.DL1_SEGMENT2,15,1)) AS DCRESERV1                     
     ,hex(SUBSTR(T6H0.DL1_SEGMENT2,16,5)) AS TRANSDAT
     ,objektid                as OBJEKTID
     ,objektbort    as OBJBORT         
     FROM TDRT6H0      T6H0
     inner join  TDRT6g0      T6g0
     on T6H0.CCK_PNR = T6g0.CCK_PNR
     WHERE T6H0.CCK_PNR = 96611168177
     ORDER BY T6H0.EXTRACT_ORDER ASC


and these are the results

Quote:

0
0005
SIMPSON, MICHAEL
Any st 110
38276
MALERAS
10
40
000000000C
40
40
D6
4040404040
40
020200403C
6158902711100


What I would like to do would be to show the EBCDIC characters as ASCII (?), ie, show a 40 as a "space" and the D6 results as the letter O (as in Oscar).
In addition, it would be nice to show the 020200403C character as the decimal it really is.

I'm assuming I need SOMETHING like CAST or similar, but whatever I try doing doesn't result in what I'm after.

Thanks you.
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kolusu
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Joined: 26 Nov 2002
Posts: 12368
Topics: 75
Location: San Jose
PostPosted: Thu May 16, 2024 2:52 pm    Post subject: Reply with quote
misi01,

misi01 wrote:

What I would like to do would be to show the EBCDIC characters as ASCII (?), ie, show a 40 as a "space" and the D6 results as the letter O (as in Oscar).


It is not ASCII. X'40' is space in EBCDIC and in ASCII it is X'20'.

You can display X'40' as space if you follow the procedure list here (3rd solution)
https://mvsforums.com/helpboards/viewtopic.php?p=11074#11074

Once you convert aka Unhex the value then you can use the scalar function EBCDIC_CHR to display as space.

X'40' = decimal 64 and X'D6' = 214

Now you can use
Code:

SELECT EBCDIC_CHR(64)   
      ,EBCDIC_CHR(214)   
  FROM SYSIBM.SYSDUMMY1 
  ;                     


Which will show you SPACE and O as output


misi01 wrote:

In addition, it would be nice to show the 020200403C character as the decimal it really is.


If the number is always a packed decimal number then you can use this
Code:

SELECT CASE SUBSTR('020200403C',10,1)                   
              WHEN 'C' THEN '+'                         
              WHEN 'D' THEN '-'                         
               END                              ||     
        DIGITS(INT(SUBSTR('020200403C',1,9)))           
  FROM SYSIBM.SYSDUMMY1                                 
  ;

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