From: | Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> |
---|---|
To: | "David E(dot) Wheeler" <david(at)kineticode(dot)com> |
Cc: | PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>, Merlin Moncure <mmoncure(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Subject: | Re: proposal: plpgsql - iteration over fields of rec or row variable |
Date: | 2010-11-09 17:35:10 |
Message-ID: | AANLkTin_FJU+36zBNA-DXQiQA3xWoBFvMvgHL_ZpVoFt@mail.gmail.com |
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Lists: | pgsql-hackers |
2010/11/9 David E. Wheeler <david(at)kineticode(dot)com>:
> On Nov 9, 2010, at 1:38 AM, Dmitriy Igrishin wrote:
>
>> * text[] = record_to_array(record)
>> * table(id, key, datatype, value) = record_to_table(record)
>> * text = record_get_field(record, text)
>> * record = record_set_field(record, text, anyelement)
>>
>> ??
>> I personally like it. But I propose to add as well:
>> integer := record_nkeys();
>> text := record_get_field(record, integer);
>
> You realize you can pretty much do all this with hstore, right?
hstore has similar functionality, but missing a some details and add
lot of other functionality - it doesn't identify type of field.
Personally - it is nothing what I like - but can be better than
nothing.
Pavel
>
> hstore hash := hstore(record);
> ary text[] := hstore_to_matrix(hash);
> select * from each(hash); -- TABLE
> text foo := hash -> somekey;
> hash := hash || '"key","value"'::hstore;
> record := populate_record(record, hash);
>
> Best,
>
> David
>
>
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