On 10/12/07, Simon Riggs <[EMAIL PROTECTED]> wrote: > I think you should add some examples to show how we would handle an > INSERT or an UPDATE SET with quite_nullable() and a SELECT WHERE clause > with quote_literal. The difference is a subtle one, which is why nobody > mentioned it before, so it needs some better docs too. > > A cross-ref to the functions page would help also.
Alright, I've improved the documentation along the lines suggested by Simon. There's a full example on doing a null-safe dynamic UPDATE, as well as a brief discussion about being wary of using comparison operators with NULLs (e.g., in WHERE clauses). Cross references abound. I did make a version of the patch which has the pg_proc entries for quote_literal and quote_nullable both pointing to the same internal function. I thought this was a tidier solution, but it failed regression test #5 in opr_sanity; apparently two entries in pg_proc can't have the same prosrc and differing proisstrict? Cheers, BJ
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