Re: problems with foreign keys on partitioned tables

On 2019-Jan-09, Amit Langote wrote:

> 1. Foreign keys of partitions stop working correctly after being detached
> from the parent table

> This happens because the action triggers defined on the PK relation (pk)
> refers to p as the referencing relation.  On detaching p1 from p, p1's
> data is no longer accessible to that trigger.

Ouch.

> To fix this problem, we need create action triggers on PK relation
> that refer to p1 when it's detached (unless such triggers already
> exist which might be true in some cases).  Attached patch 0001 shows
> this approach.

Hmm, okay.  I'm not in love with the idea that such triggers might
already exist -- seems unclean.  We should remove redundant action
triggers when we attach a table as a partition, no?

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
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