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Simplify handling of the timezone GUC by making initdb choose the default.

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We were doing some amazingly complicated things in order to avoid running
the very expensive identify_system_timezone() procedure during GUC
initialization.  But there is an obvious fix for that, which is to do it
once during initdb and have initdb install the system-specific default into
postgresql.conf, as it already does for most other GUC variables that need
system-environment-dependent defaults.  This means that the timezone (and
log_timezone) settings no longer have any magic behavior in the server.
Per discussion.
This commit is contained in:
Tom Lane
2011-09-09 17:59:11 -04:00
parent a7801b62f2
commit ca4af308c3
19 changed files with 1373 additions and 1368 deletions
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25
src/include/pgtime.h
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@ -40,6 +40,11 @@ struct pg_tm
typedef struct pg_tz pg_tz;
typedef struct pg_tzenum pg_tzenum;
/* Maximum length of a timezone name (not including trailing null) */
#define TZ_STRLEN_MAX 255
/* these functions are in localtime.c */
extern struct pg_tm *pg_localtime(const pg_time_t *timep, const pg_tz *tz);
extern struct pg_tm *pg_gmtime(const pg_time_t *timep);
extern int pg_next_dst_boundary(const pg_time_t *timep,
@ -52,22 +57,20 @@ extern int pg_next_dst_boundary(const pg_time_t *timep,
extern size_t pg_strftime(char *s, size_t max, const char *format,
const struct pg_tm * tm);
extern void pg_timezone_pre_initialize(void);
extern void pg_timezone_initialize(void);
extern pg_tz *pg_tzset(const char *tzname);
extern bool tz_acceptable(pg_tz *tz);
extern bool pg_get_timezone_offset(const pg_tz *tz, long int *gmtoff);
extern const char *pg_get_timezone_name(pg_tz *tz);
extern bool pg_tz_acceptable(pg_tz *tz);
/* these functions and variables are in pgtz.c */
extern pg_tz *session_timezone;
extern pg_tz *log_timezone;
extern void pg_timezone_initialize(void);
extern pg_tz *pg_tzset(const char *tzname);
extern pg_tzenum *pg_tzenumerate_start(void);
extern pg_tz *pg_tzenumerate_next(pg_tzenum *dir);
extern void pg_tzenumerate_end(pg_tzenum *dir);
extern pg_tz *session_timezone;
extern pg_tz *log_timezone;
extern pg_tz *gmt_timezone;
/* Maximum length of a timezone name (not including trailing null) */
#define TZ_STRLEN_MAX 255
#endif /* _PGTIME_H */