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  3. May 2022

Re: Service DNS_LOOKUP does not require that

Hello Rob,

Am 26.05.2022 um 15:31 schrieb Rob Berendt <rob@xxxxxxxxx>:

It just makes me giddy that the new DNS_LOOKUP table function does not require that you have the following loaded on to your system:
Licensed Product
Program Option Description
5770SS1 31 Domain Name System

Why a client command required a server product baffled me but this gets around it.

Easy: The server isn't required to run on the same system then the client.

Once you configure a DNS server in the TCP/IP settings, the "DNS client" embedded in the TCP/IP can use this one.

Each and every DNS resolution service is using the respective OS APIs under the hood. This is also true for SQL using that API (most likely UNIX-like APIs gethostbyname, gethostbyaddr).

My "idea" to unbundle the command NSLOOKUP was declined but my idea to have a SQL Service to replace NSLOOKUP, and not have a requirement for option 31, was accepted and provided. Yay! Love that DB2 team!

Nice!

:wq! PoC




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