On Sun, Oct 30, 2016 at 10:35 AM, Kevin Grittner <kgrittn@gmail.com> wrote:
> SPI support would also > allow us to consider using set logic for validating foreign keys, > instead of the one-row-at-a-time approach currently used.
Just as a proof of concept for this I used the attached test case to create foreign keys using current techniques versus set-oriented queries with the transition-tsr code. These probably can be improved, since this is a "first cut" off the top of my head.
The delete of about one million rows from a "parent" table with no matching rows in the "child" table, and no index on referencing column in the child table, took 24:17.969 using current triggers and 00:03.262 using the set-based triggers. Yes, that reduces current run time for that case by 99.78%
