Re: Querying all documents for a company and its projects etc
David G. Johnston <david.g.johnston@gmail.com>
From: David G Johnston <david.g.johnston@gmail.com>
To: pgsql-general@postgresql.org
Date: 2014-04-14T19:55:26Z
Lists: pgsql-general
A couple of thoughts: 1) The "union" really only pertains to the entity table rows; once you "union all" those (duplicates should not matter and probably will not even be present so using "all" avoids an unnecessary sort) you can join that sub-query to the document_usage table. 2) Since every entity must have an associated company moving the company_id field to the entity table will allow a direct search for company objects using entity alone and remove the need to perform the union. The "company" table omits the implicit self-referencing company_id but it is still there in reality. David J. -- View this message in context: http://postgresql.1045698.n5.nabble.com/Querying-all-documents-for-a-company-and-its-projects-etc-tp5799967p5799978.html Sent from the PostgreSQL - general mailing list archive at Nabble.com.