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Why there is a union in HeapTupleHeaderData struct - Mailing list pgsql-hackers

From Soroosh Sardari
Subject Why there is a union in HeapTupleHeaderData struct
Date
Msg-id CAFUsPDaD1yTJ0KmRUaAOt80ULBe-LhkWpmSYTU2ZgxnKKLecFQ@mail.gmail.com
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Responses Re: Why there is a union in HeapTupleHeaderData struct  (Amit Langote <amitlangote09@gmail.com>)
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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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