INTERSECT/EXCEPT and duplicates?

From: Tatsuo Ishii <t-ishii(at)sra(dot)co(dot)jp>
To: pgsql-hackers(at)postgreSQL(dot)org
Subject: INTERSECT/EXCEPT and duplicates?
Date: 1999-08-05 01:13:59
Message-ID: 199908050113.KAA03407@ext16.sra.co.jp
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Hi,

SQL92 seems to assume that results of the INTERSECT/EXCEPT contain no
duplications unless "ALL" is specified. However PostgreSQL 6.5.1 does
not follow the requirement, I think. Maybe we need to add this to the
TODO list?
---
Tatsuo Ishii

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