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Obtaining primary key information from pg system tables - Mailing list pgsql-sql

From Kris
Subject Obtaining primary key information from pg system tables
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Msg-id 009201c219d7$c6605420$30267bd5@graveland
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List pgsql-sql
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Hi,
 
I am trying to generate some xml metadata from the pg system tables for my java code generation utility. I have can get most information, but i would like to be able to tell which column is a primary key or which one is a foreign key (i dont need to know which table the foreign key references at this point).
 
Which tables do i need reference, could anyone provide an example query?
 
Kris

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