From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
---|---|
To: | Alvaro Herrera <alvherre(at)commandprompt(dot)com> |
Cc: | Andrew Hammond <andrew(dot)george(dot)hammond(at)gmail(dot)com>, pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: interval / interval -> double operator |
Date: | 2007-05-30 02:47:00 |
Message-ID: | 24438.1180493220@sss.pgh.pa.us |
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Lists: | pgsql-hackers |
Alvaro Herrera <alvherre(at)commandprompt(dot)com> writes:
> Andrew Hammond escribi:
>> Which got me looking for "date_part". But that only seems to be in the
>> gram.y file, include/catalog/pg_proc.h and the test suite. The pg_proc.h
>> stuff looks pretty interesting, but to decipher it, I figured I need to read
>> up on SystemFuncName().
> That's where you got lost -- if you had looked at the pg_proc.h entries
> more carefully you would have seen that they point to other functions,
Yeah --- AFAIR SystemFuncName() is just a convenience function that
does the equivalent of plastering "pg_catalog." on the front of the
mentioned name, so that it can't be confused with any non-built-in
function.
regards, tom lane
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