I'm building some custom extension on top of postgres 9.6.1. As part of
that, I would like to read Heap Tuple directly from my extension using
Primary Key.

By default, postgres table index(B-Tree) its PrimaryKey(PK). So, i would
like to get TID by doing a lookup into PK's B-Tree index. Using which i
could read HeapTuple directly.

Please suggest me the easiest way to lookup into PK's B-Tree index for
getting TIDs.

Suggesting a postgres extensions which does B-Tree lookup will also helps

Awaiting your response.

Thanks & Best Regards
- Mahi

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