Joshua Reich <josh@root.net> writes:
>> if (PG_ARGISNULL(0) || PG_ARGISNULL(1))
>> {
>> ereport(ERROR,
>> (errcode(ERRCODE_ARRAY_ELEMENT_ERROR),
>> errmsg("Cannot work with NULL arrays")));
>> }
This is useless code if the function is declared STRICT, as C functions
most often are. What you *do* need to be checking is ARR_HASNULL(),
since there isn't anything very useful you can do with null elements
within the arrays.
regards, tom lane
