On 03/22/2014 01:43 AM, Thom Brown wrote:
> Hi,
>
> I've created a table with 1000 partial indexes. Each one matches
> exactly one row based on the predicate WHERE id = <value>.
>
> However, when I perform an UPDATE of a single row in a transaction,
> I've noticed that all those partial indexes show up in pg_locks with
> RowExclusiveLock.
>
> Only 2 of those indexes have a reference to the row: the primary key
> and a single partial index.
>
> Is it necessary for a partial index that doesn't include the row to be
> involved in locking?
What if the update puts the row into one of the other indexes?
--
Vik