From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Havasvölgyi Ottó <h(dot)otto(at)freemail(dot)hu> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: Some rare questions |
Date: | 2005-12-05 02:34:13 |
Message-ID: | 200512050234.jB52YDv02210@candle.pha.pa.us |
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Thread: | |
Lists: | pgsql-general |
The answers to these are either "unlimited" or mentioned in the FAQ.
---------------------------------------------------------------------------
Havasvlgyi Ott wrote:
> Hi,
>
> I am writing a driver for PostgreSQL, and I need some rare info:
>
>
> How can I query the collation/locale of the database cluster?
>
> What can be the maximal length of the indexed part of the string. So I have
> a text field, and I create an index on it. How long can be one index key max
> in this case?
>
> How deep can be the subquery nesting?
>
> How long can be the index key?
>
> What is maximal number of compare operations for a single query?
>
> What is maximal length of a query text (characters) ?
>
> What is maximal length of a row (bytes) ?
>
> What is the maximal length of char/varchar/text ?
>
> What operations cannot be rolled back with Rollback ?
>
> Thanks in advance,
> Otto
>
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 6: explain analyze is your friend
>
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
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