Pavel Stehule wrote:
Hello
2008/11/5 Peter Eisentraut <[EMAIL PROTECTED]>:
Decibel! wrote:
ISTM it'd be useful to have an array_length function (since I just wrote
one for work ;), so here's a patch. Note that I don't have the docs
toolchain setup, so I wasn't able to test the doc patches.
There is a tiny problem with this implementation: It returns null for an
empty array, not zero. This is because array_lower and/or array_upper
return null for an empty array, which makes sense for those cases. We could
fix this by putting a coalesce around the expression, but since the array
functions return null for all kinds of error cases, this might mask other
problems. Or we move to a C implementation.
we should to write function isempty(anyarray), that returns true when
param is empty.
Well, isn't isempty() just a special case of array_length()? One or the
other needs to be implemented, so we might as well go for the general
case, IMO.
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