Pavel Stehule <pavel.stehule@gmail.com> writes:
>> Curiously enough, Oracle has it so that || of null arguments treats the
>> arguments as empty string.
>>
>> It's beyond comprehension.
>>
> what is result of '' || '' ?
Well the result of this is NULL of course (which is the same as '')
What's more puzzling is what the answer to 'foo' || NULL is...
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