Re: [HACKERS] Slow - grindingly slow - query

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От Hannu Krosing
Тема Re: [HACKERS] Slow - grindingly slow - query
Дата
Msg-id 382B29FB.9FFBF61C@tm.ee
обсуждение исходный текст
Ответ на Slow - grindingly slow - query  (Theo Kramer <theo@flame.co.za>)
Список pgsql-hackers
Theo Kramer wrote:
> 
> Hi
> 
> I have a single table with two views. The table effectively contains both
> master and detail info (legacy stuff I'm afraid). The query in question is
> used to see if any records exist in the detail that do not exist in the
> master. The table and index definition is as follows
> 
>   create table accounts (
>     domain text,
>     registrationtype char
>     /* Plus a couple of other irrelevant fields */
>   );
> 
>   create index domain_idx on accounts (domain);
>   create index domain_type_idx on accounts (domain, registrationtype);

try using   create index registrationtype_index  on accounts (registrationtype);

------
Hannu


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