| From: | Gregory Stark <stark(at)enterprisedb(dot)com> |
|---|---|
| To: | Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> |
| Cc: | Peter Eisentraut <peter_e(at)gmx(dot)net>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Sam Mason <sam(at)samason(dot)me(dot)uk>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: WIP: hooking parser |
| Date: | 2009-02-20 14:19:31 |
| Message-ID: | 87d4ddw5qk.fsf@oxford.xeocode.com |
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| Thread: | |
| Lists: | pgsql-hackers |
Pavel Stehule <pavel(dot)stehule(at)gmail(dot)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...
--
Gregory Stark
EnterpriseDB http://www.enterprisedb.com
Get trained by Bruce Momjian - ask me about EnterpriseDB's PostgreSQL training!
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