Re: Partitioning on the date part of a timestamp & PK issues

On 7/15/21 9:53 PM, Alvaro Herrera wrote:
> On 2021-Jul-15, Ron wrote:
>
>> CREATE TABLE t (
>>      guid uuid not null,
>>      seq smallint not null,
>>      tid smallint not null,
>>      ts timestamp without time zone not null,
>>      x real,
>>      y real,
>>      z real,
>>      primary key (guid, tid, seq, ts)
>> )   partition by range (ts);
> This definition will let you have multiple rows for the same
> (guid,tid,seq) combination, as long as they have different ts values.
> That is at odds with the original formulation, in which there could be a
> single row with any given combination of those three columns.

That's the cost of partitioning by something other than uid, tid or seq.

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