On Thu, Mar 27, 2008 at 8:58 PM, Tom Lane <[EMAIL PROTECTED]> wrote: > If you want a sub-array you need to use the slice notation, eg > tdr_tags[2:2][1:2]
The slice approach is not a general solution...in fact there seems to be no way to convert an array of N dimensions to N-1 dimensions except in the special case of N=1. One side effect of this is that the _pg_expand_array approaches which I was about to suggest to the OP only work for one dimensional arrays. reading the archives, you wrote: "Because it isn't a slice expression --- you used colon nowhere, so the result type is going to be text not text[]. (Remember that the parser must determine the expression's result type at parse time, so whether there are enough subscripts can't enter into this.) Our alternatives here are to throw a subscripting error or return NULL. I'd personally have gone with throwing an error, I think, but it seems far too late to revisit that decision." is there not enough information available to the parser to reduce the expression dimensions by one? merlin -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
