| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Sandro Dentella <sandro(dot)dentella(at)tin(dot)it> |
| Cc: | pgsql-interfaces(at)postgresql(dot)org, pgsql-docs(at)postgresql(dot)org |
| Subject: | Re: [INTERFACES] function returning NULL? |
| Date: | 2001-04-30 14:24:24 |
| Message-ID: | 14767.988640664@sss.pgh.pa.us |
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| Lists: | pgsql-docs pgsql-interfaces |
Sandro Dentella <sandro(dot)dentella(at)tin(dot)it> writes:
> I'm trying to create a function that should return a date, and occasionally
> NULL value. I can't see how to do that. I'm using pl/tcl.
You need the "return_null" command, which is new in 7.1 --- before that
there was no way to do it in pltcl.
"return_null" seems to be missing from the documentation :-(. No wonder
you couldn't find it.
regards, tom lane
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