From: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
---|---|
To: | Thomas Kellerer <spam_eater(at)gmx(dot)net> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: Does PostgreSQL ever create indexes on its own? |
Date: | 2015-11-12 22:34:14 |
Message-ID: | 20151112223414.GT614468@alvherre.pgsql |
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Lists: | pgsql-general |
Thomas Kellerer wrote:
> Doiron, Daniel schrieb am 12.11.2015 um 23:21:
> >I’m troubleshooting a schema and found this:
> >
> >Indexes:
> > "pk_patient_diagnoses" PRIMARY KEY, btree (id)
> The only index that Postgres "automatically" creates is the unique index supporting a primary key or a unique constraint.
>
> But apart from that, Postgres never creates indexes on its own.
>
> So from the list above, only pk_patient_diagnose has (most probably) been created automatically. Everything else was created manually.
As I recall, the naming convention is to append "_pkey", not to prepend
"pk_", so not even that one. (Of course, you can tell it what name to
use when creating the constraint, which is what was done here.)
--
Álvaro Herrera http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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