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From: ajit wangkhem <ajit.wangkhem@gmail.com>
Date: Mon, 25 Nov 2024 13:21:41 +0530
Message-ID: <CAMurXp115NcKB64EsksfSMJmztS_FBm0PuAmnXu_OXgh8MVz3w@mail.gmail.com>
Subject: Re: Unique key constraint Issue
To: shashidhar Reddy <shashidharreddy001@gmail.com>
Cc: pgsql-general <pgsql-general@postgresql.org>
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  Output should be consistent across servers below query o/p

SELECT conname, pg_get_constraintdef(oid)
FROM pg_constraint
WHERE conrelid =3D 'your table name'::regclass AND contype =3D 'u';
(different datatype combine in UK is not an issue). This issue may not
happen in asynchronous, log shipping or streaming replication. In logical
replication it may create problem.

On Mon, Nov 25, 2024 at 12:01=E2=80=AFPM shashidhar Reddy <
shashidharreddy001@gmail.com> wrote:

> Hello,
>
> We have postgresql servers with PostgreSQL 13.10   on Ubuntu release 22.0=
4.
>
> The issue is a unique key constraint with two columns one is character
> another is integer. At some point the unique key did not work as I see
> duplicate values with these two columns combination and it happened on
> multiple servers on multiple databases on same table with same unique key=
.
> I tried db dump and restore but the key is failing to create when restore
> with duplicate value errors.
>
>
>
>

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<div dir=3D"ltr">=C2=A0 Output=C2=A0should be consistent across servers bel=
ow query o/p<div><br></div><div>SELECT conname, pg_get_constraintdef(oid)<b=
r>FROM pg_constraint<br>WHERE conrelid =3D &#39;your table name&#39;::regcl=
ass AND contype =3D &#39;u&#39;;</div><div>(different datatype=C2=A0combine=
=C2=A0in UK is not an issue). This issue may not happen in asynchronous, lo=
g shipping or streaming replication. In logical replication it may create p=
roblem.</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D=
"gmail_attr">On Mon, Nov 25, 2024 at 12:01=E2=80=AFPM shashidhar Reddy &lt;=
<a href=3D"mailto:shashidharreddy001@gmail.com">shashidharreddy001@gmail.co=
m</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin=
:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"=
><div dir=3D"auto"><div dir=3D"auto">Hello,</div><div dir=3D"auto"><br></di=
v><div dir=3D"auto">We have postgresql servers with PostgreSQL 13.10=C2=A0 =
=C2=A0on Ubuntu release 22.04.</div><div dir=3D"auto"><br></div><div dir=3D=
"auto">The issue is a unique key constraint with two columns one is charact=
er another is integer. At some=C2=A0point the unique key did=C2=A0not work =
as I see duplicate values with these two columns combination and it happene=
d on multiple servers on multiple databases on same table with same unique =
key. I tried db dump and restore but the key is failing to create when rest=
ore with duplicate value errors.</div><div dir=3D"auto"><br></div><div dir=
=3D"auto"><br></div><div dir=3D"auto"><br></div></div>
</blockquote></div>

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