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Difference between HeapTupleData and TupleTableSlot structures - Mailing list pgsql-hackers

From Ajay P S
Subject Difference between HeapTupleData and TupleTableSlot structures
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Msg-id CAHjjAw3Ja=DXUEH2zO1Hp8POCDsKk89u02Fc0pAC-Zoe_vTnUA@mail.gmail.com
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Responses Re: Difference between HeapTupleData and TupleTableSlot structures  (Tom Lane <tgl@sss.pgh.pa.us>)
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Hi,

I am pretty new to the Postgres code base. I would like to know the difference between HeapTupleData and TupleTableSlot structures. 

Basically I am trying to understand some of the table access methods like heap_insert, heap_getnext, heap_getnextslot etc where some accepts Heaptuple as input and some accepts TupleTableSlot.

Could anyone please help me to understand this? Any example would also be helpful.

Best,
Ajay 

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