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From:Baron Schwartz Date:February 11 2009 2:41pm
Subject:Re: Size limitation of user variable?
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Right, my (implied) point was that you have AT LEAST one limitation --
your max_packet_size.  And I showed the way the original author can
investigate and figure out the rest himself :)

On Wed, Feb 11, 2009 at 4:28 AM, Johan De Meersman <vegivamp@stripped> wrote:
> What you just tested, on the other hand, was the limit of your maxpacket :-)
> Up that to something unlikely and try again :-)
>
> On Tue, Feb 10, 2009 at 9:24 PM, Baron Schwartz <baron@stripped> wrote:
>>
>> On Tue, Feb 10, 2009 at 1:29 PM, Cantwell, Bryan
>> <bcantwell@stripped> wrote:
>> > I am trying to put the result of a function that returns MEDIUMTEXT into
>> > a user variable in my procedure. I haven't attempted to push the limits
>> > of the MEDIUMTEXT size, but wonder if the user variable can even handle
>> > this?
>>
>>
>> The REPEAT() function helps here:
>>
>> mysql> set @var := repeat('a', 1024 * 1024);
>> Query OK, 0 rows affected (0.05 sec)
>>
>> mysql> select length(@var);
>> +--------------+
>> | length(@var) |
>> +--------------+
>> |      1048576 |
>> +--------------+
>> 1 row in set (0.01 sec)
>>
>> So it accepts a mebibyte, let's see if we can notch that up :)
>>
>> mysql> set @var := repeat('a', 1024 * 1024 * 1024);
>> Query OK, 0 rows affected, 1 warning (0.00 sec)
>>
>> mysql> show warnings;
>>
>>
> +---------+------+------------------------------------------------------------------------------+
>> | Level   | Code | Message
>>                         |
>>
>>
> +---------+------+------------------------------------------------------------------------------+
>> | Warning | 1301 | Result of repeat() was larger than
>> max_allowed_packet (16777216) - truncated |
>>
>>
> +---------+------+------------------------------------------------------------------------------+
>> 1 row in set (0.00 sec)
>>
>> --
>> Baron Schwartz, Director of Consulting, Percona Inc.
>> Our Blog: http://www.mysqlperformanceblog.com/
>> Our Services: http://www.percona.com/services.html
>>
>> --
>> MySQL General Mailing List
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>>
>
>
>
> --
> Celsius is based on water temperature.
> Fahrenheit is based on alcohol temperature.
> Ergo, Fahrenheit is better than Celsius. QED.
>



-- 
Baron Schwartz, Director of Consulting, Percona Inc.
Our Blog: http://www.mysqlperformanceblog.com/
Our Services: http://www.percona.com/services.html
Thread
db setupPJ9 Feb
  • Re: db setupOlaf Stein9 Feb
  • Re: db setup - correctionOlaf Stein9 Feb
    • Re: db setup - correctionPJ9 Feb
      • Re: db setup - correctionPeter Brawley9 Feb
        • Re: db setup - correctionOlaf Stein9 Feb
        • Re: db setup - correctionPJ9 Feb
          • Re: db setup - correctionOlaf Stein9 Feb
          • Re: db setup - correctionPeter Brawley9 Feb
            • Re: db setup - correctionPJ10 Feb
              • Re: db setup - correctionPeter Brawley10 Feb
                • Re: db setup - correctionPJ10 Feb
                  • Re: db setup - correctionPeter Brawley10 Feb
                  • Re: db setup - correctionddevaudreuil10 Feb
                    • Size limitation of user variable?Bryan Cantwell10 Feb
                      • Re: Size limitation of user variable?Baron Schwartz10 Feb
                        • Re: Size limitation of user variable?Johan De Meersman11 Feb
                          • Re: Size limitation of user variable?Baron Schwartz11 Feb
Re: db setup - correctionPJ10 Feb