| From: | Joe Conway <mail(at)joeconway(dot)com> |
|---|---|
| To: | Markus Bertheau <twanger(at)bluetwanger(dot)de> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "Patches (PostgreSQL)" <pgsql-patches(at)postgresql(dot)org> |
| Subject: | Re: [SQL] array_in: '{}}'::text[] |
| Date: | 2004-08-28 22:41:27 |
| Message-ID: | 41310A17.5020405@joeconway.com |
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| Lists: | pgsql-patches pgsql-sql |
Markus Bertheau wrote:
>
> Without looking at the code in a whole, you accept '{} ' as an empty
> array literal, so why is the special case for '{}' needed here?
It's a fast path for a common special case. Why spend any cycles parsing
if we can immediately recognize it? However, anything other than a
simple '{}' does require parsing.
Joe
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