On Fri, Oct 21, 2011 at 6:50 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> More cleanup after failed reduced-lock-levels-for-DDL feature.
>
> Turns out that use of ShareUpdateExclusiveLock or ShareRowExclusiveLock
> to protect DDL changes had gotten copied into several places that were
> not touched by either of Simon's original patches for the feature, and
> thus neither he nor I thought to revert them. (Indeed, it appears that
> two of these uses were committed *after* the reversion, which just goes
> to show that git merging is no panacea.) Change these places to use
> AccessExclusiveLock again. If we ever manage to resurrect that feature,
> we're going to have to think a bit harder about how to keep lock level
> usage in sync for DDL operations that aren't within the AlterTable
> infrastructure.
>
> Two of these bugs are only in HEAD, but one is in the 9.1 branch too.
> Alvaro found one of them, I found the other two.
Very cool, thanks.
--
Simon Riggs http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
