Re: [HACKERS] Associative Operators? (Was: Re: [NOVICE] Out of frying pan, into fire)

> Seth McQuale pointed out that the follwing does not work:
>   SELECT LASTNAME || ',' || FIRSTNAME [AS] NAME FROM FRIENDS;
> 
> The solution, was:
>   SELECT ( LASTNAME || ',' ) || FIRSTNAME AS NAME FROM FRIENDS;
> 
> I looked at pg_operator and didn't see any flag to mark
> an operator as 'associative'.   Perhaps if we added a flag
> like this, the re-write system could be modified to handle
> cases like this.
> 
> Thoughts?
> 
> Clark Evans
> 
> 

My guess is that we should auto-left-associate functions like || if no
parens are present.  It would be a small change to the parser.

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