pgsql: Fix pg_size_pretty() to avoid overflow for inputs close to INT64

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: pgsql-committers(at)postgresql(dot)org
Subject: pgsql: Fix pg_size_pretty() to avoid overflow for inputs close to INT64
Date: 2011-04-25 20:22:41
Message-ID: E1QESIr-0002ul-DC@gemulon.postgresql.org
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Fix pg_size_pretty() to avoid overflow for inputs close to INT64_MAX.

The expression that tried to round the value to the nearest TB could
overflow, leading to bogus output as reported in bug #5993 from Nicola
Cossu. This isn't likely to ever happen in the intended usage of the
function (if it could, we'd be needing to use a wider datatype instead);
but it's not hard to give the expected output, so let's do so.

Branch
------
REL8_4_STABLE

Details
-------
http://git.postgresql.org/pg/commitdiff/13ec0bda2a127c3af85ed5f08e8d69c9082dccf5

Modified Files
--------------
src/backend/utils/adt/dbsize.c | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)

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