Re: Very specialised query

On Wed, 1 Apr 2009, Matthew Wakeling wrote:
> So, I have written a plpgsql function to calculate overlaps. It works
> reasonably quickly where there aren't that many overlaps. However, it seems
> to go very slowly when there are a large number of rows to return.

In plpgsql, what happens about memory allocation? It's just, I'm
generating and throwing away an awful lot of arrays. When do they get
unallocated?

Also, if I assign a variable (or an element of an array) to be the
contents of another variable (which may be a primitive, array, or row),
does it copy the contents or do it by reference?

Matthew

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