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The set of clients who recognize the difference between the MODIFIES SQL DATA and CONTAINS SQL data classifications, and who could correctly select which version of a QCMDEXC procedure to use, is very small. The development team believes the error that would result from using the CONTAINS SQL version with a CL command that uses SQL would be confusing to most users. This is an additional reason we are not accepting this request.
Db2 for IBM i team
IBM Power Systems Development
The CAAC has reviewed this requirement and recommends that IBM not implement this request. This is not likely a common use case among the IBM i community, and the submitter has written his own solution.
Background: The COMMON Americas Advisory Council (CAAC) members have a broad range of experience in working with small and medium-sized IBM i customers. CAAC has a key role in working with IBM i development to help assess the value and impact of individual RFEs on the broader IBM i community, and has therefore reviewed your RFE.
For more information about CAAC, see www.common.org/caac
Nancy Uthke-Schmucki - CAAC Program Manager
Bob,
The qcmdexc scalar function has multiple uses. You dont necessarily need to use it to run another UDF or UDTF. I have used it to run CL commands and executed it from CL, or blended CL and SQL together.
Maybe it would fit your use case?
https://www.ibm.com/docs/en/i/7.4?topic=services-qcmdexc-scalar-function
jp lamontre, I do not. I use it IN a UDF/UDTF I never need it to RUN another UDF/UDTF.
Hi Bob,
why/when do you need qsys2.qcmdexc to run a udf ?
Just as preemptive note: I have written my own QCAPCMD SQL Procedure with CONTAINS SQL for just this purpose and it works fine. I also created a C stub that can be INCLUDE'd in SQL functions that uses a host variable to run a CL command which only uses whatever READS/CONTAINS/MODIFIES setting the new function uses. This is actually th best solution. Perhaps an inline QCMDEXC "macro" of sorts.