you can set a (rather simplistic) length limit to a variable by code.
OBJECT SET FILTER(*;"__object_name_here";"! &@"+("#"*$maxlen))
http://doc.4d.com/4Dv15/4D/15.4/OBJECT-SET-FILTER.301-3273846.en.html
http://doc.4d.com/4Dv15/4D/15.4/Filter-and-format-codes.300-3285353.en.html
but I still don't understand how knowing the variable type would help.
you would have gotten "text" whether the definition on the Oracle side was 255,
4000.
> 2017/09/11 16:13、Piotr Chabot Stadhouders <p.stadhoud...@timeff.com> のメール：
> When I know the "subtype", I can then handle typing in the "On before
> keystroke"
> Off course setting a max length field as property for an object would be the
> ideal world.
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