Using the Unpivot Operator when in Oracle8i PL/SQL Generation Mode

Hi,
when you are validating a mapping with contains an unpivot operator and the PL/SQL Generation Mode is set to Oracle8i (because you're using an Oracle8i 8.1.7. target database) the following error is raised:
VLD-3127: Cannot generate code for UNPIVOT because the unpivot operator is only supported starting with the Oracle9i version of the database.","The unpivot operator is only supported starting with the Oracle9i version of the database. To resolve this, set the PL/SQL Generation Mode to Oracle9i in the configuration of the Oracle module that contains this mapping.
When you set the PL/SQL Generation Mode to Oracle9i and after successfully validating the mapping generate the code you can see that within the generated code case-statements are used for the unpivot translation.
like:
MIN(CASE WHEN "AGG_YEAR_MONTH" = 200301 THEN "NO_CALLS" ELSE NULL END) "JAN2003_CALLS"
And as Oracle8i doesn't support the case-statement, the raised validation error is understandable. But the generated code can be easily modified using decode-classes instead of the case-statements.
results in:
MIN(DECODE("AGG_YEAR_MONTH",''200301'',"NO_CALLS",NULL)) "JAN2003_CALLS"
And the generated code works fine in the Oracle8i 8.1.7 target database.
But now my question:
Does someone know if it is possible to create a custom unpivot operator in OWB9.2.0 which will generate the code using the decode-class instead of using the case-statements. And if so, how I can create such custom operator.
Many Thx in advantage!
Remco

Hi,
The reason why OWB does not generate decode statements is that the generated code needs to support both set-based and row-based operation modes. Decodes are valid in SQL (set based), but not in PL/SQL (row based)
Oracle 8i (8.1.7) does in fact support CASE, but only in SQL statements, not PL/SQL
Have you considered creating a view to perform the unpivot operation using decode? It should also be possible solve your problem using a function
Regards,
Roald

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