Re: Missing array support

Joe, do you need a TODO added for this?

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Joe Conway wrote:
> Tom Lane wrote:
> > Joe Conway <mail@joeconway.com> writes:
> > 
> >>So array[] should produce '{}' of (an array) type determined by the 
> >>context? OK -- seems easy enough.
> > 
> > Is it?  I think we'd decided that this could only reasonably be handled
> > by creating a datatype representing array-of-UNKNOWN.  I'm afraid to do
> > that because I think it might allow the parser's type resolution
> > algorithms to follow paths we will not like.  Perhaps it can be made to
> > work, but I think it will require some careful study.
> 
> I took a closer look -- yeah, without array-of-UNKNOWN I don't think we 
> can make this work.
> 
> I got something working by forcing the element type to UNKNOWN when the 
> elements list is empty in transformExpr(), but then select_common_type() 
> turns around and turns UNKNOWN into TEXT, so you wind up with an empty 
> text[].
> 
> I won't bother sending that patch in because I *know* it will get 
> rejected ;-)
> 
> I guess we should put array-of-UNKNOWN on the list of things to look at 
> for 7.5.
> 
> Joe
> 
> 
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