differnce from ansi sql standard - unicode strings?

From: Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>
To: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: differnce from ansi sql standard - unicode strings?
Date: 2009-02-16 22:09:00
Message-ID: 162867790902161409gf483a4n3a815faaf11ea99a@mail.gmail.com
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Hello

I found BNF for SQL 2003 and I found there some small difference.
Standard use keyword ESCAPE, but PostgreSQL use keybord UESCAPE.

Anybody knows reason?

<Unicode character string literal> ::=
[ <introducer> <character set specification> ]
U <ampersand> <quote> [ <Unicode representation> ... ] <quote>
[ { <separator> <quote> [ <Unicode representation> ... ] <quote> }... ]
[ ESCAPE <escape character> ]

thank you
Pavel Stehule

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