ASCII to EBCDIC Conversion with DFSORT
MartinPacker 11000094DH Comments (4) Visits (19407)
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This past week I've been updating our SQL Analysis code to cope with Unicode SQL statements. (If you bind a package or plan once you've gone to DB2 Version 8 New Function Mode the statement text is stored in the Catalog in Unicode.) These statements are in Unicode UTF-8 which is extremely similar to ASCII. So I snaffled some existing code of mine that converts from ASCII to EBCDIC and pressed it into service...
If the first 10 bytes of the statement text (minus the 2 4-byte header fields) contain X'40' (an EBCDIC null (space)) then I consider the text to be in EBCDIC. Otherwise I deem it to be ASCII - and do the conversion. (You might ask "what about statements like ROLLBACK?" Well, it turns out that in SYSPACKSTMT there is always a trailing blank on the statement text - so that's alright. :-)
(In fact my code decodes all the structural information in the SYSPACKSTMT STMT column - including extracting information on host variables.)
Now, my colleagues sometimes just want to take a look at the statement text sometimes - without bothering to run my code. So here's what I learned when creating a DFSORT job I set up for them to run, converting the statement text from ASCII to EBCDIC.
Converting ASCII to EBCDIC With DFSORT
First, a disclaimer: Certain codepoints might need slight adjustment in some countries - for example if you have dollar versus pound sterling issues.
First you code an ALTSEQ statement: