Hi Mark,

On Mon, Jan 25, 2021, at 09:14, Joel Jacobson wrote:
> I'll continue testing over the next couple of days and report if I find any 
> more oddities.

I've continued testing by trying to make full use of this feature in the 
catalog-diff-tool I'm working on.

Today I became aware of a SQL feature that I must confess I've never used 
before,
that turned out to be useful in my tool, as I then wouldn't need to follow FKs
to do updates manually, but let the database do them automatically.

I'm talking about "ON CASCADE UPDATE", which I see is not supported in the 
patch.

In my tool, I could simplify the code for normal FKs by using ON CASCADE UPDATE,
but will continue to need my hand-written traverse-FKs-recursively code for 
Foreign Key Arrays.

I lived a long SQL life without ever needing ON CASCADE UPDATE,
so I would definitively vote for Foreign Key Arrays to be added even without 
support for this.

Would you say the patch is written in a way which would allow adding support 
for ON CASCADE UPDATE
later on mostly by adding code, or would it require a major rewrite?

I hesitated if I should share this with you, since I'm really grateful for this 
feature even without ON CASCADE UPDATE,
but since this was discovered when testing real-life scenario and not some 
hypothetical example,
I felt it should be noted that I stumbled upon this during testing.

Again, thank you so much for working on this.

/Joel

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