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help / color / mirror / Atom feedFrom: Ron Johnson <[email protected]>
To: pgsql-general <[email protected]>
Subject: Re: Regarding use of single column as primary key on partitioned table
Date: Sat, 28 Sep 2024 00:49:35 -0400
Message-ID: <CANzqJaAknAV3vhxQ3tnJkGbHEmQJwWhi5jVW7wYkwZx4WQh2DA@mail.gmail.com> (raw)
In-Reply-To: <CAKFQuwarcToEtVZHOo5O_CBe4ZD2mGZM35R28kLn=MNi0D6X2w@mail.gmail.com>
References: <CAJCZko+pA8o3HDBuGzxzYjMo=Gm_8yBLk7Sod3Fdo-i0WAwLuA@mail.gmail.com>
<CAKFQuwarcToEtVZHOo5O_CBe4ZD2mGZM35R28kLn=MNi0D6X2w@mail.gmail.com>
On Sat, Sep 28, 2024 at 12:39 AM David G. Johnston <
[email protected]> wrote:
> On Friday, September 27, 2024, Durgamahesh Manne <
> [email protected]> wrote:
>
>>
>> ERROR: unique constraint on partitioned table must include all
>> partitioning columns
>> DETAIL: PRIMARY KEY constraint on table "bet" lacks column "placedon"
>> which is part of the partition key.
>> test=>
>>
>> Can't we use primary key on singal column(betid) on partitioned table
>> rather than using composite key (placedon,betid)?
>>
>
> No. It would be misleading to allow such a thing because a unique index
> can only span a single partition.
>
That is IMO a serious (and probably unfixable, given how PG stores tables)
flaw in PG's partitioning design.
--
Death to <Redacted>, and butter sauce.
Don't boil me, I'm still alive.
<Redacted> crustacean!
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Subject: Re: Regarding use of single column as primary key on partitioned table
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