Re: Performance problems with large telemetric datasets on 7.4.2

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От Tom Lane
Тема Re: Performance problems with large telemetric datasets on 7.4.2
Дата
Msg-id 4770.1186180449@sss.pgh.pa.us
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Ответ на Re: Performance problems with large telemetric datasets on 7.4.2  (Andrew Kroeger <andrew@sprocks.gotdns.com>)
Ответы Re: Performance problems with large telemetric datasets on 7.4.2  ("Sven Clement" <sven@dsign.lu>)
Список pgsql-performance
Andrew Kroeger <andrew@sprocks.gotdns.com> writes:
> With the table definitions you posted, one of the first things I noticed
> was that the default value for an integer column was a bigint value.  I
> did some quick 32-bit math and found that the smallest legal 32-bit
> integer value is -2147483648, not -2147483684 (notice the last 2 numbers
> are transposed).

Oooh, good catch, but 7.4 seems to notice the overflow all right:

regression=# create temp table foo(f1 int default -2147483684::bigint);
CREATE TABLE
regression=# insert into foo default values;
ERROR:  integer out of range
regression=# select version();
                            version
----------------------------------------------------------------
 PostgreSQL 7.4.17 on hppa-hp-hpux10.20, compiled by GCC 2.95.3
(1 row)

So I think we can conclude that the OP never actually uses this default.

            regards, tom lane

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