stfdxv commented on issue #38883:
URL: https://github.com/apache/arrow/issues/38883#issuecomment-1827115752

   For example
   Struct's validity bitmap: 00001011
   Field-0's validity bitmap: 00001101
   Field-1's validity bitmap: 00001111
   
   If field-0 or field-1 had valid values at index 2 (hence validity bit 1 at 
index 2), these values would be hidden indeed by the struct's validity bit 0 at 
index 2.


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