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Integer range?

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The range of a twos-complement 32-bit integer is -2147483648 through
2147483647. Yet in Postgres:


# select -2147483647::int4;
  ?column?   
-------------
 -2147483647
(1 row)

# select -2147483648::int4;
ERROR:  integer out of range


Is this a bug? Or something required by the SQL standard?

(8.3.7, OS X 10.5.8, 32-bit build)

-- 
Scott Ribe
scott_ribe@xxxxxxxxxxxxxxx
http://www.killerbytes.com/
(303) 722-0567 voice



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