Re: [HACKERS] [POC] hash partitioning

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От Robert Haas
Тема Re: [HACKERS] [POC] hash partitioning
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Msg-id CA+TgmoZkHOtEhcCudqZzEViAyuaOGFe4+zSnXpN3MyGVTAHm8g@mail.gmail.com
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Ответ на Re: [HACKERS] [POC] hash partitioning  (Ashutosh Bapat <ashutosh.bapat@enterprisedb.com>)
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On Tue, May 16, 2017 at 3:19 AM, Ashutosh Bapat
<ashutosh.bapat@enterprisedb.com> wrote:
> While earlier, I thought the same, I am wondering whether this is
> true. Don't different collations deem different strings equal e.g one
> collation may deem 'aa' and 'AA' as same but other may not.

No, that's not allowed.  This has been discussed many times on this
mailing list.  See varstr_cmp(), which you will notice refuses to
return 0 unless the strings are bytewise identical.

> Or is that
> encoding problem being discussed in hash functions thread?

No, that's something else entirely.

-- 
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company



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