Horton

Re: [BUG] wrong FK constraint name when colliding name on ATTACH

Alvaro Herrera <alvherre@alvh.no-ip.org>

View thread View on postgr.es
From: Alvaro Herrera <alvherre@alvh.no-ip.org>
To: Amit Langote <amitlangote09@gmail.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, Andres Freund <andres@anarazel.de>, Jehan-Guillaume de Rorthais <jgdr@dalibo.com>, pgsql-hackers <pgsql-hackers@postgresql.org>
Date: 2022-09-09T10:31:49Z
Lists: pgsql-hackers 
On 2022-Sep-09, Amit Langote wrote:

> Yes, the loop in GetForeignKeyActionTriggers() needs this:
> 
> +       /* Only ever look at "action" triggers on the PK side. */
> +       if (RI_FKey_trigger_type(trgform->tgfoid) != RI_TRIGGER_PK)
> +           continue;
> 
> Likewise, GetForeignKeyActionTriggers() needs this:
> 
> +       /* Only ever look at "check" triggers on the FK side. */
> +       if (RI_FKey_trigger_type(trgform->tgfoid) != RI_TRIGGER_FK)
> +           continue;
> 
> We evidently missed this in f4566345cf40b0.

Ouch.  Thank you, pushed.

> On Fri, Sep 9, 2022 at 4:54 AM Tom Lane <tgl@sss.pgh.pa.us> wrote:

> > I'd counsel dropping the early-exit optimization; it doesn't
> > save much I expect, and it evidently hides bugs.  Or maybe
> > make it conditional on !USE_ASSERT_CHECKING.
> 
> While neither of these functions are called in hot paths, I am
> inclined to keep the early-exit bit in non-assert builds.

I kept it that way.

-- 
Álvaro Herrera        Breisgau, Deutschland  —  https://www.EnterpriseDB.com/
"El hombre nunca sabe de lo que es capaz hasta que lo intenta" (C. Dickens)

Commits

  1. Create FKs properly when attaching table as partition

  2. Fix self-referencing foreign keys with partitioned tables

  3. Fix GetForeignKey*Triggers for self-referential FKs

  4. Choose FK name correctly during partition attachment

  5. Update SQL features

  6. Restore the previous semantics of get_constraint_index().