When I check the unique property of a field, 4D adds an index to that field. 
Same when I define a primary key. So I'm wondering if being unique is an index 
property instead of a field property… But in system tables, that property 
exists twice:
  _USER_COLUMNS.UNIQUENESS
  _USER_INDEXES.UNIQUENESS
Some light?

-- 
Arnaud de Montard 


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