Обсуждение: [ADMIN] how to find a pg_toast table's primary table
Hi all; I'm seeing this table as the most vacuumed table: pg_toast.pg_toast_16784 How do I find the primary table for this toast table? Thanks in advance
On 12/13/2016 03:24 PM, ProPAAS DBA wrote: > Hi all; > > > I'm seeing this table as the most vacuumed table: > > > pg_toast.pg_toast_16784 > > How do I find the primary table for this toast table? Within the database: select oid::regclass from pg_class where reltoastrelid='16784'::regclass; JD; -- Command Prompt, Inc. http://the.postgres.company/ +1-503-667-4564 PostgreSQL Centered full stack support, consulting and development. Everyone appreciates your honesty, until you are honest with them.
ProPAAS DBA <dba@propaas.com> writes: > Hi all; > > > I'm seeing this table as the most vacuumed table: > > > pg_toast.pg_toast_16784 > > How do I find the primary table for this toast table? Find the pg_class row with reltoastrelid = $oid-of-toast-table. HTH > > > > Thanks in advance -- Jerry Sievers Postgres DBA/Development Consulting e: postgres.consulting@comcast.net p: 312.241.7800
select relname from pg_class where reltoastrelid = ( select oid from pg_class where relname = 'toast_table_name' );
On Tue, Dec 13, 2016 at 3:24 PM, ProPAAS DBA <dba@propaas.com> wrote:
Hi all;
I'm seeing this table as the most vacuumed table:
pg_toast.pg_toast_16784
How do I find the primary table for this toast table?
Thanks in advance
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Thanks,
Jorge Torralba
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Jerry Sievers <gsievers19@comcast.net> writes: > ProPAAS DBA <dba@propaas.com> writes: >> pg_toast.pg_toast_16784 >> How do I find the primary table for this toast table? > Find the pg_class row with reltoastrelid = $oid-of-toast-table. After you've done that a couple of times, you'll notice that the numeric part of the toast table's name is the OID of its parent, so really you just need to do select '16784'::regclass; Confirming the reltoastrelid link is a good idea though. regards, tom lane