Tom Lane writes:
> I don't see any clear statement in SQL92 that <delimited identifiers>
> can't have zero length, so I'm not convinced there's anything wrong here.
Hmm, I do:
<delimited identifier> ::=
<double quote> <delimited identifier body> <double quote>
<delimited identifier body> ::= <delimited identifier part>...
<delimited identifier part> ::=
<nondoublequote character>
| <doublequote symbol>
As opposed to, say, an empty character string literal:
<character string literal> ::=
[ <introducer><character set specification> ]
<quote> [ <character representation>... ] <quote>
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[ { <separator>... <quote> [ <character representation>... ] <quote>
}... ]
--
Peter Eisentraut [EMAIL PROTECTED] http://yi.org/peter-e/
