Re: Patches for LOCALTIME and regexp, feature list

You wrote "was either to voluminous" instead of "was either too voluminous"
in the first paragraph of the appendix...

Chris

----- Original Message -----
From: "Thomas Lockhart" <lockhart@fourpalms.org>
To: "PostgreSQL Hackers List" <pgsql-hackers@postgresql.org>
Sent: Saturday, June 15, 2002 1:16 PM
Subject: [HACKERS] Patches for LOCALTIME and regexp, feature list


> I've just committed changes to include an SQL99 feature list as an
> appendix in the User's Guide. While preparing that I noticed a feature
> or two which would be trivial to implement, so we now have LOCALTIME and
> LOCALTIMESTAMP function calls per spec (afaict; the spec is very vague
> on the behaviors).
>
> I've also removed the ODBC-compatible parentheses on CURRENT_TIMESTAMP
> etc and made sure that the ODBC driver handles the case correctly.
>
> More details from the CVS logs are below...
>
>                      - Thomas
>
> Add LOCALTIME and LOCALTIMESTAMP functions per SQL99 standard.
> Remove ODBC-compatible empty parentheses from calls to SQL99 functions
>  for which these parentheses do not match the standard.
> Update the ODBC driver to ensure compatibility with the ODBC standard
>  for these functions (e.g. CURRENT_TIMESTAMP, CURRENT_USER, etc).
> Include a new appendix in the User's Guide which lists the labeled
> features
>  for SQL99 (the labeled features replaced the "basic", "intermediate",
>  and "advanced" categories from SQL92). features.sgml does not yet split
>  this list into "supported" and "unsupported" lists.
> Search the existing regular expression cache as a ring buffer.
> Will optimize the case for repeated calls for the same expression,
>  which seems to be the most common case. Formerly, always searched
>  from the first entry.
> May want to look at the least-recently-used algorithm to make sure it
>  is identifying the right slots to reclaim. Seems silly to do math when
>  it seems that we could simply use an incrementing counter...
>
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