Hi Roland,

Unfortunately that limit can't be change  as it's at the very base levels of 
the runtime, development indicate.

What is the use case you have that requires such a large GROUP_CONCAT size ?

Best Regards
Hugh Williams
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> On 7 Nov 2016, at 22:57, Roland Cornelissen <metamatter...@gmail.com> wrote:
> 
> Him
> 
> Is it possible to (temporarily) increase the maximum GROUP_CONCAT size? 
> Someting like this:     
> SET SESSION group_concat_max_len = 1000000;
> I run into this error when using GROUP_CONCAT:
> 
> *** Error 22023: [Virtuoso Driver][Virtuoso Server]SR578: The expected result 
> length of string concatenation is too large (10000059 bytes)
> in lines 120-125 of Top-Level:
> I would like to temporarily increase the maximum value; how can this be done?
> 
> Thanks,
> Roland
> 
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