Why there is a union in HeapTupleHeaderData struct

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От Soroosh Sardari
Тема Why there is a union in HeapTupleHeaderData struct
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Msg-id CAFUsPDaD1yTJ0KmRUaAOt80ULBe-LhkWpmSYTU2ZgxnKKLecFQ@mail.gmail.com
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Ответы Re: Why there is a union in HeapTupleHeaderData struct
Список pgsql-hackers
Dear Hackers

In fix part oh HeapTuple, there is a union that is named t_choice,
union
    {
        HeapTupleFields t_heap;
        DatumTupleFields t_datum;
    }            t_choice;

I can't find out why we need t_datum, actually there is no comment about DatumTupleFields.

Regards
Soroosh


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