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INTERSECT/EXCEPT and duplicates? - Mailing list pgsql-hackers

From Tatsuo Ishii
Subject INTERSECT/EXCEPT and duplicates?
Date
Msg-id 199908050113.KAA03407@ext16.sra.co.jp
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Responses Re: [HACKERS] INTERSECT/EXCEPT and duplicates?
Re: [HACKERS] INTERSECT/EXCEPT and duplicates?
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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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