From: Scott Marlowe <scott.marlowe@gmail.com>
To: Rob Sargent <robjsargent@gmail.com>
Cc: Osvaldo Kussama <osvaldo.kussama@gmail.com>
Cc: m_qoreishy@yahoo.com
Cc: pgsql-sql@postgresql.org
Subject: Re: reading last inserted record withoud any autoincrement field
Date: Mon, 5 Oct 2009 16:23:28 -0600
Message-ID: <dcc563d10910051523x59de62c6he5cdd8d567845c10@mail.gmail.com> (raw)
In-Reply-To: <4AC8F8BC.2050905@gmail.com>
References: <444951.51198.qm@web33806.mail.mud.yahoo.com>
<690707f60910041137l340d2873le86d8f3458188471@mail.gmail.com>
<4AC8F8BC.2050905@gmail.com>
On Sun, Oct 4, 2009 at 1:34 PM, Rob Sargent <robjsargent@gmail.com> wrote:
> Osvaldo Kussama wrote:
>>
>> 2009/10/4 mohammad qoreishy <m_qoreishy@yahoo.com>
>>
>>>
>>> How can get last inserted record in a table without any autoincrement
>>> filed?
>>> I need to frequently fetch the last inserted record.
>>> If I must use the "Cursor" please explain your solution.
>>>
>>>
>>
>>
>> RETURNING clause?
>> http://www.postgresql.org/docs/current/interactive/sql-insert.html
>>
>> Osvaldo
>>
>>
>
> It took the OP to mean last insert as in randomly in the past, not as part
> of current transaction. My fear is OP's schema has no way of identifying
> time-of-insert, nor a monotonically increasing record id and is hoping
> postgres has a some internal value that will return the most recently
> inserted record. Without a table definition it's hard to say.
Given that he's mentioning cursors, I'm guessing he's talking about
during this session / transaction. So returning would be best. Note
that returning returns a SET of results, so that if your insert
inserts 10 rows, you'll get back 10 rows from returning.
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To: pgsql-sql@postgresql.org
Cc: scott.marlowe@gmail.com, robjsargent@gmail.com, osvaldo.kussama@gmail.com, m_qoreishy@yahoo.com
Subject: Re: reading last inserted record withoud any autoincrement field
In-Reply-To: <dcc563d10910051523x59de62c6he5cdd8d567845c10@mail.gmail.com>
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