Re: Re: Escaping strings for inclusion into SQL queries

Peter Eisentraut <peter_e(at)gmx(dot)net> writes:

> Florian Weimer writes:
>
> > The first version escaped ' with ''. I changed it when I noticed that
> > if \' is used instead, the same function can be used for strings
> > ('...') and identifiers ("...").
>
> Last time I checked (15 seconds ago), you could not escape " with \ in
> PostgreSQL. The identifer parsing rules are a bit different from strings.

Yes, we misread the lexer description. I'm sorry about that.

In addition, there seems to be a bug in the treatment of "" escapes in
identifiers. 'SELECT """";' yields the error message 'Attribute '""'
not found ' (not '"'!) or even 'Attribute '""\' not found', depending
on the queries executed before.

For identifiers, comparing the characters to a white list is probably
a more reasonable approach.

--
Florian Weimer Florian(dot)Weimer(at)RUS(dot)Uni-Stuttgart(dot)DE
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