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Commitf4c4f1c

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>> Do you agree that using a hashtable for it in general is a good idea
>> assuming this sideeffect is removed, though?>>I have no problem with the hashtable, only with preloading it with>everything. What I'd like to see is that the table inherited at fork()>contains just the data for the default timezone. (At least in the>normal case where that setting hasn't been changed since postmaster>start.)Here's a patch doing this. Changes score_timezone not to use pg_tzset(),and thus not loading all the zones in the cache. The actual timezonebeing picked will be set using set_global_timezone() which in turn callspg_tzset() and loads it in the cache.Magnus Hagander
1 parentb4132fd commitf4c4f1c

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‎src/timezone/pgtz.c‎

Lines changed: 12 additions & 7 deletions
Original file line numberDiff line numberDiff line change
@@ -6,7 +6,7 @@
66
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
77
*
88
* IDENTIFICATION
9-
* $PostgreSQL: pgsql/src/timezone/pgtz.c,v 1.32 2005/05/29 04:23:07 tgl Exp $
9+
* $PostgreSQL: pgsql/src/timezone/pgtz.c,v 1.33 2005/06/15 00:09:26 momjian Exp $
1010
*
1111
*-------------------------------------------------------------------------
1212
*/
@@ -162,14 +162,19 @@ score_timezone(const char *tzname, struct tztry * tt)
162162
structtm*systm;
163163
structpg_tm*pgtm;
164164
charcbuf[TZ_STRLEN_MAX+1];
165-
pg_tz*tz;
165+
pg_tztz;
166166

167-
tz=pg_tzset(tzname);
168-
if (!tz)
169-
return-1;/* can't handle the TZ name at all */
167+
168+
/* Load timezone directly. Don't use pg_tzset, because we don't want
169+
* all timezones loaded in the cache at startup. */
170+
if (tzload(tzname,&tz.state)!=0) {
171+
if (tzname[0]==':'||tzparse(tzname,&tz.state, FALSE)!=0) {
172+
return-1;/* can't handle the TZ name at all */
173+
}
174+
}
170175

171176
/* Reject if leap seconds involved */
172-
if (!tz_acceptable(tz))
177+
if (!tz_acceptable(&tz))
173178
{
174179
elog(DEBUG4,"Reject TZ \"%s\": uses leap seconds",tzname);
175180
return-1;
@@ -179,7 +184,7 @@ score_timezone(const char *tzname, struct tztry * tt)
179184
for (i=0;i<tt->n_test_times;i++)
180185
{
181186
pgtt= (pg_time_t) (tt->test_times[i]);
182-
pgtm=pg_localtime(&pgtt,tz);
187+
pgtm=pg_localtime(&pgtt,&tz);
183188
if (!pgtm)
184189
return-1;/* probably shouldn't happen */
185190
systm=localtime(&(tt->test_times[i]));

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