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Tom Lane f2a69b352d Doc: clarify that CREATE TABLE discards redundant unique constraints. ... The SQL standard says that redundant unique constraints are disallowed, but we long ago decided that throwing an error would be too user-unfriendly, so we just drop redundant ones. The docs weren't very clear about that though, as this behavior was only explained for PRIMARY KEY vs UNIQUE, not UNIQUE vs UNIQUE. While here, I couldn't resist doing some copy-editing and markup-fixing on the adjacent text about INCLUDE options. Per bug #16767 from Matthias vd Meent. Discussion: https://postgr.es/m/16767-1714a2056ca516d0@postgresql.org		5 years ago
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src	Doc: clarify that CREATE TABLE discards redundant unique constraints.	5 years ago
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