Re: [pgsql-general 2011-1-21:] Are there any projects interested in object functionality? (+ rule bases)

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От Peter Eisentraut
Тема Re: [pgsql-general 2011-1-21:] Are there any projects interested in object functionality? (+ rule bases)
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Msg-id 1296573076.16066.6.camel@fsopti579.F-Secure.com
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Ответ на Re: [pgsql-general 2011-1-21:] Are there any projects interested in object functionality? (+ rule bases)  (Tom Lane <tgl@sss.pgh.pa.us>)
Ответы Re: [pgsql-general 2011-1-21:] Are there any projects interested in object functionality? (+ rule bases)  (Nick Rudnick <joerg.rudnick@t-online.de>)
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On mån, 2011-01-31 at 21:53 -0500, Tom Lane wrote:
> You would probably have better luck shoehorning in such a feature if the
> syntax looked like this:
> 
>     (foo).bar(baz)
> 
> foo being a value of some type that has methods, and bar being a method
> name.

The SQL standard has the <method invocation> clause that appears to
allow:
   ...something.column.method(args)

Good luck finding out how to interpret the dots, but it's specified
somewhere.

It'd be kind of nice as a syntax and namespacing alternative, actually,
but figuring out the compatibility problems would be a headache.

>   Another possibility is
> 
>     foo->bar(baz)

This is in the SQL standard under <attribute or method reference>, but
it requires the left side to be of a reference type, which is something
that we don't have.




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