Hi,
 
  I am now studying PostgreSQL.
 
in your web site:

Developer's Frequently Asked Questions (FAQ) for PostgreSQL

Technical Questions

2.1) How do I efficiently access information in tables from the backend code?

Since heap_open function needs the oid of the relation, how can I get those parameters for heap_open?
 
Suppose that at the beginning, I only know the name of the relation, which functions I need to call?
 
 
Best regards.

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